commit 4bb4f6e0973bc5eb45bd2d348013fd827aec189e
Author: ehlxr <ehlxr.me@gmail.com>
Date:   Wed Aug 1 11:18:23 2018 +0800

    init

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ca3d917
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,18 @@
+# Binaries for programs and plugins
+*.exe
+*.dll
+*.so
+*.dylib
+
+# Test binary, build with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+vendor
+
+hc*
+hex-convert
+.idea
+dist
\ No newline at end of file
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..bcc17e1
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..d9fa103
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,46 @@
+.PHONY: default init build install release dep get_deps clean build_amd64 build_386 upx
+
+# https://golang.org/doc/install/source#environment
+GOOS := $(shell go2 env | awk -F= '$$1=="GOOS" {print $$2}' | awk -F '"' '{print $$2}') # 此处 awk 需使用两个 $
+GOARCH := $(shell go2 env | awk -F= '$$1=="GOARCH" {print $$2}' | awk -F '"' '{print $$2}')
+OSS = darwin dragonfly freebsd linux netbsd openbsd plan9 solaris windows
+PKG =
+# ifeq ($(strip $(GOOS)), windows)
+# 	GOARCH := $(strip $(GOARCH)).exe
+# endif
+
+default:
+	@echo "hc info: please choose a target for 'make'"
+	@echo "available target: build install release clean build_amd64 build_386 upx"
+
+build:
+	@ go2 build -ldflags "-s -w" -o dist/hc_$(strip $(GOOS))_$(strip $(if \
+    $(findstring windows,$(GOOS)),\
+    $(strip $(GOARCH)).exe,\
+    $(strip $(GOARCH))\
+	))
+
+install:
+	go2 install -ldflags "-s -w"
+
+release: build_amd64 build_386 upx
+
+clean:
+	go2 clean -i
+	rm -rf dist/hc* hc* hex-convert
+
+build_amd64:
+	@ $(foreach OS,\
+	$(OSS),\
+	$(shell CGO_ENABLED=0 GOOS=$(OS) GOARCH=amd64 go2 build -ldflags "-s -w" -o dist/hc_$(OS)_amd64$(if $(findstring windows,$(OS)),.exe)))
+	@ echo done
+
+build_386:
+	@ $(foreach OS,\
+	$(OSS),\
+	$(shell CGO_ENABLED=0 GOOS=$(OS) GOARCH=386 go2 build -ldflags "-s -w" -o dist/hc_$(OS)_386$(if $(findstring windows,$(OS)),.exe)))
+	@ echo done
+
+# 压缩。需要安装 https://github.com/upx/upx
+upx:
+	upx $(if $(PKG),$(PKG),dist/hc*)
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..33363c8
--- /dev/null
+++ b/README.md
@@ -0,0 +1,22 @@
+# hex-convert
+
+```
+支持 76 位以内的任意进制相互转换
+
+Usage:
+  hc [command]
+
+Available Commands:
+  b           转换为二进制
+  d           转换为十进制
+  h           转换为十六进制
+  help        Help about any command
+  o           转换为八进制
+  server      启动 HTTP Server
+
+Flags:
+  -d, --data string   要转换数值
+  -h, --help          help for hc
+  -s, --scale int     要转换的进制
+  -v, --version       show version of the hc.
+```
\ No newline at end of file
diff --git a/assets/index.tpl b/assets/index.tpl
new file mode 100644
index 0000000..7b60d60
--- /dev/null
+++ b/assets/index.tpl
@@ -0,0 +1,13 @@
+<h1>转换十进制</h1>
+<form action="d" method="post">
+    <input type="text" name="scale" onkeyup="this.value=this.value.replace(/\D/g,'')" placeholder="进制数"/><br>
+    <input type="text" name="data" placeholder="数值"/>
+    <input type="submit" value="转换"/>
+</form>
+
+<h1>转换二进制</h1>
+<form action="b" method="post">
+    <input type="text" name="scale" onkeyup="this.value=this.value.replace(/\D/g,'')" placeholder="进制数"/><br>
+    <input type="text" name="data" placeholder="数值"/>
+    <input type="submit" value="转换" />
+</form>
\ No newline at end of file
diff --git a/cmd/binary.go b/cmd/binary.go
new file mode 100644
index 0000000..57a2796
--- /dev/null
+++ b/cmd/binary.go
@@ -0,0 +1,52 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+
+	"github.com/ehlxr/hex-convert/converter"
+	"github.com/spf13/cobra"
+)
+
+// binaryCmd represents the binary command
+var binaryCmd = &cobra.Command{
+	Use:   "b",
+	Short: "转换为二进制",
+	Long:  `转换为二进制：包括 76 位以内的任意进制转换为二进制`,
+	Run: func(cmd *cobra.Command, args []string) {
+		scale, _ := strconv.Atoi(rootCmd.PersistentFlags().Lookup("scale").Value.String())
+		data := rootCmd.LocalFlags().Lookup("data").Value.String()
+
+		result, err := converter.ToBinary(scale, data)
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		fmt.Println(result)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(binaryCmd)
+}
diff --git a/cmd/decimal.go b/cmd/decimal.go
new file mode 100644
index 0000000..1bef921
--- /dev/null
+++ b/cmd/decimal.go
@@ -0,0 +1,52 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+
+	"github.com/ehlxr/hex-convert/converter"
+	"github.com/spf13/cobra"
+)
+
+// decimalCmd represents the decimal command
+var decimalCmd = &cobra.Command{
+	Use:   "d",
+	Short: "转换为十进制",
+	Long:  `转换为十进制：包括 76 位以内的任意进制转换为十进制`,
+	Run: func(cmd *cobra.Command, args []string) {
+		scale, _ := strconv.Atoi(rootCmd.PersistentFlags().Lookup("scale").Value.String())
+		data := rootCmd.LocalFlags().Lookup("data").Value.String()
+
+		result, err := converter.ToDecimal(scale, data)
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		fmt.Println(result)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(decimalCmd)
+}
diff --git a/cmd/hexadecimal.go b/cmd/hexadecimal.go
new file mode 100644
index 0000000..2d5722a
--- /dev/null
+++ b/cmd/hexadecimal.go
@@ -0,0 +1,53 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+
+	"github.com/ehlxr/hex-convert/converter"
+
+	"github.com/spf13/cobra"
+)
+
+// hexadecimalCmd represents the hexadecimal command
+var hexadecimalCmd = &cobra.Command{
+	Use:   "h",
+	Short: "转换为十六进制",
+	Long:  `转换为十六进制：包括 76 位以内的任意进制转换为十六进制`,
+	Run: func(cmd *cobra.Command, args []string) {
+		scale, _ := strconv.Atoi(rootCmd.PersistentFlags().Lookup("scale").Value.String())
+		data := rootCmd.LocalFlags().Lookup("data").Value.String()
+
+		result, err := converter.ToHex(scale, data)
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		fmt.Println(result)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(hexadecimalCmd)
+}
diff --git a/cmd/octal.go b/cmd/octal.go
new file mode 100644
index 0000000..ba75695
--- /dev/null
+++ b/cmd/octal.go
@@ -0,0 +1,52 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+
+	"github.com/ehlxr/hex-convert/converter"
+	"github.com/spf13/cobra"
+)
+
+// octalCmd represents the octal command
+var octalCmd = &cobra.Command{
+	Use:   "o",
+	Short: "转换为八进制",
+	Long:  `转换为八进制：包括 76 位以内的任意进制转换为八进制`,
+	Run: func(cmd *cobra.Command, args []string) {
+		scale, _ := strconv.Atoi(rootCmd.PersistentFlags().Lookup("scale").Value.String())
+		data := rootCmd.LocalFlags().Lookup("data").Value.String()
+
+		result, err := converter.ToOctal(scale, data)
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		fmt.Println(result)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(octalCmd)
+}
diff --git a/cmd/root.go b/cmd/root.go
new file mode 100644
index 0000000..b1fe9b3
--- /dev/null
+++ b/cmd/root.go
@@ -0,0 +1,83 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/ehlxr/hex-convert/metadata"
+	homedir "github.com/mitchellh/go-homedir"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var cfgFile string
+
+var rootCmd = &cobra.Command{
+	Use:     "hc",
+	Short:   "进制转换",
+	Long:    `支持 76 位以内的任意进制相互转换`,
+	Version: metadata.VERSION,
+}
+
+// Execute adds all child commands to the root command and sets flags appropriately.
+// This is called by main.main(). It only needs to happen once to the rootCmd.
+func Execute() {
+	if err := rootCmd.Execute(); err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}
+
+func init() {
+	cobra.OnInitialize(initConfig)
+
+	rootCmd.Flags().BoolP("version", "v", false, "show version of the hc.")
+	rootCmd.PersistentFlags().IntP("scale", "s", 0, "要转换的进制")
+	rootCmd.PersistentFlags().StringP("data", "d", "", "要转换数值")
+}
+
+// initConfig reads in config file and ENV variables if set.
+func initConfig() {
+	if cfgFile != "" {
+		// Use config file from the flag.
+		viper.SetConfigFile(cfgFile)
+	} else {
+		// Find home directory.
+		home, err := homedir.Dir()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+
+		// Search config in home directory with name ".hex-convert" (without extension).
+		viper.AddConfigPath(home)
+		viper.SetConfigName(".hex-convert")
+	}
+
+	viper.AutomaticEnv() // read in environment variables that match
+
+	// If a config file is found, read it in.
+	if err := viper.ReadInConfig(); err == nil {
+		fmt.Println("Using config file:", viper.ConfigFileUsed())
+	}
+}
diff --git a/cmd/server.go b/cmd/server.go
new file mode 100644
index 0000000..6ba5778
--- /dev/null
+++ b/cmd/server.go
@@ -0,0 +1,54 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+
+	"github.com/ehlxr/hex-convert/server"
+	"github.com/spf13/cobra"
+)
+
+// serverCmd represents the server command
+var serverCmd = &cobra.Command{
+	Use:   "server",
+	Short: "启动 HTTP Server",
+	Long: `
+启动一个简单的 http server 用于提供页面访问`,
+	Run: func(cmd *cobra.Command, args []string) {
+
+		host := cmd.LocalFlags().Lookup("host").Value.String()
+		port, _ := strconv.Atoi(cmd.LocalFlags().Lookup("port").Value.String())
+
+		if err := server.Start(host, port); err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(serverCmd)
+	serverCmd.Flags().IntP("port", "p", 8080, "bind port of the server.")
+	serverCmd.Flags().StringP("host", "a", "0.0.0.0", "bind TCP address of the server.")
+}
diff --git a/converter/converter.go b/converter/converter.go
new file mode 100644
index 0000000..353e530
--- /dev/null
+++ b/converter/converter.go
@@ -0,0 +1,100 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package converter
+
+import (
+	"math"
+	"strconv"
+	"strings"
+
+	"github.com/ehlxr/hex-convert/metadata"
+)
+
+func ToDecimal(scale int, data string) (int, error) {
+	var new_num float64
+	new_num = 0.0
+	nNum := len(strings.Split(data, "")) - 1
+	for _, value := range strings.Split(data, "") {
+		tmp := float64(findkey(value))
+		if tmp != -1 {
+			new_num = new_num + tmp*math.Pow(float64(scale), float64(nNum))
+			nNum = nNum - 1
+		} else {
+			break
+		}
+	}
+	return int(new_num), nil
+}
+
+func ToBinary(scale int, data string) (string, error) {
+	result, err := ToDecimal(scale, data)
+	if err != nil {
+		return "", err
+	}
+
+	return fromDecimal(2, result)
+}
+
+func ToHex(scale int, data string) (string, error) {
+	result, err := ToDecimal(scale, data)
+	if err != nil {
+		return "", err
+	}
+
+	return fromDecimal(16, result)
+}
+
+func ToOctal(scale int, data string) (string, error) {
+	result, err := ToDecimal(scale, data)
+	if err != nil {
+		return "", err
+	}
+
+	return fromDecimal(8, result)
+}
+
+func findkey(in string) int {
+	result := -1
+	for k, v := range metadata.TEN_TO_ANY {
+		if in == v {
+			result = k
+		}
+	}
+	return result
+}
+
+func fromDecimal(scale, data int) (string, error) {
+	new_num_str := ""
+	var remainder int
+	var remainder_string string
+	for data != 0 {
+		remainder = data % scale
+		if 76 > remainder && remainder > 9 {
+			remainder_string = metadata.TEN_TO_ANY[remainder]
+		} else {
+			remainder_string = strconv.Itoa(remainder)
+		}
+		new_num_str = remainder_string + new_num_str
+		data = data / scale
+	}
+
+	return new_num_str, nil
+}
diff --git a/gen/assets_generate.go b/gen/assets_generate.go
new file mode 100644
index 0000000..f2da43d
--- /dev/null
+++ b/gen/assets_generate.go
@@ -0,0 +1,44 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+// +build ignore
+//go:generate go run assets_generate.go
+
+package main
+
+import (
+	"log"
+	"net/http"
+
+	"github.com/shurcooL/vfsgen"
+)
+
+func main() {
+	var fs http.FileSystem = http.Dir("../assets")
+
+	err := vfsgen.Generate(fs, vfsgen.Options{
+		Filename:     "assets_vfsdata.go",
+		PackageName:  "gen",
+		VariableName: "Assets",
+	})
+	if err != nil {
+		log.Fatalln(err)
+	}
+}
diff --git a/gen/assets_vfsdata.go b/gen/assets_vfsdata.go
new file mode 100644
index 0000000..22487b1
--- /dev/null
+++ b/gen/assets_vfsdata.go
@@ -0,0 +1,184 @@
+// Code generated by vfsgen; DO NOT EDIT.
+
+package gen
+
+import (
+	"bytes"
+	"compress/gzip"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+	pathpkg "path"
+	"time"
+)
+
+// Assets statically implements the virtual filesystem provided to vfsgen.
+var Assets = func() http.FileSystem {
+	fs := vfsgen۰FS{
+		"/": &vfsgen۰DirInfo{
+			name:    "/",
+			modTime: time.Date(2018, 8, 2, 2, 1, 27, 751097893, time.UTC),
+		},
+		"/index.tpl": &vfsgen۰CompressedFileInfo{
+			name:             "index.tpl",
+			modTime:          time.Date(2018, 8, 2, 2, 1, 27, 751448710, time.UTC),
+			uncompressedSize: 563,
+
+			compressedContent: []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\xe4\xd0\xbd\x4e\xc3\x30\x10\x07\xf0\x3d\x4f\x71\xba\xa5\x20\xa1\x5a\xdd\x6d\x4f\x3c\x06\x8b\x93\x1c\x38\x22\xfe\x90\x7d\x46\x74\x83\x8d\x81\x8e\x9d\xd8\x98\x19\x3a\x31\x20\x10\x2f\x43\xa2\x3e\x06\x2a\x19\x22\x21\x10\x0f\xc0\x66\x59\xf7\xf1\xbf\x9f\xb4\x2b\xbd\x7f\x7b\x1a\x37\x8f\xc3\xe6\x76\xff\xfe\x30\xdc\x3d\x4b\x61\x57\xba\x92\xe7\x21\x39\x30\x0d\x77\xc1\x2b\x6c\x11\x1c\xb1\x0d\xad\xc2\x18\x32\xa3\xae\x00\x00\x64\xe7\x63\x61\xe0\x75\x24\x85\x4c\xd7\x8c\xe0\x8d\x23\x85\xb9\x31\x3d\x21\x04\x7f\x49\xeb\x12\x15\xb2\xed\xf2\xf2\xca\xf4\x85\xd4\xfc\x5c\x26\x8a\xbd\x69\xe8\x48\x9c\x9d\x8a\x8b\x93\xc5\xe2\x18\xe1\xeb\xc3\x86\xbe\xa5\xa4\x70\x8a\x33\x6e\x77\x28\xb4\xac\xd3\x1f\x3b\x5b\xc3\xe6\xdb\x80\x71\xbb\x1b\x6e\x5e\x51\xfc\xd0\x99\x4b\xed\x3a\x46\x98\x42\xe1\x44\x70\xa8\x94\xe2\x70\xb8\xae\xaa\x59\xe6\xe3\xe5\xfe\x77\x99\xfa\x7f\xc8\xc0\x4c\xf3\x19\x00\x00\xff\xff\xac\x32\x6c\x93\x33\x02\x00\x00"),
+		},
+	}
+	fs["/"].(*vfsgen۰DirInfo).entries = []os.FileInfo{
+		fs["/index.tpl"].(os.FileInfo),
+	}
+
+	return fs
+}()
+
+type vfsgen۰FS map[string]interface{}
+
+func (fs vfsgen۰FS) Open(path string) (http.File, error) {
+	path = pathpkg.Clean("/" + path)
+	f, ok := fs[path]
+	if !ok {
+		return nil, &os.PathError{Op: "open", Path: path, Err: os.ErrNotExist}
+	}
+
+	switch f := f.(type) {
+	case *vfsgen۰CompressedFileInfo:
+		gr, err := gzip.NewReader(bytes.NewReader(f.compressedContent))
+		if err != nil {
+			// This should never happen because we generate the gzip bytes such that they are always valid.
+			panic("unexpected error reading own gzip compressed bytes: " + err.Error())
+		}
+		return &vfsgen۰CompressedFile{
+			vfsgen۰CompressedFileInfo: f,
+			gr: gr,
+		}, nil
+	case *vfsgen۰DirInfo:
+		return &vfsgen۰Dir{
+			vfsgen۰DirInfo: f,
+		}, nil
+	default:
+		// This should never happen because we generate only the above types.
+		panic(fmt.Sprintf("unexpected type %T", f))
+	}
+}
+
+// vfsgen۰CompressedFileInfo is a static definition of a gzip compressed file.
+type vfsgen۰CompressedFileInfo struct {
+	name              string
+	modTime           time.Time
+	compressedContent []byte
+	uncompressedSize  int64
+}
+
+func (f *vfsgen۰CompressedFileInfo) Readdir(count int) ([]os.FileInfo, error) {
+	return nil, fmt.Errorf("cannot Readdir from file %s", f.name)
+}
+func (f *vfsgen۰CompressedFileInfo) Stat() (os.FileInfo, error) { return f, nil }
+
+func (f *vfsgen۰CompressedFileInfo) GzipBytes() []byte {
+	return f.compressedContent
+}
+
+func (f *vfsgen۰CompressedFileInfo) Name() string       { return f.name }
+func (f *vfsgen۰CompressedFileInfo) Size() int64        { return f.uncompressedSize }
+func (f *vfsgen۰CompressedFileInfo) Mode() os.FileMode  { return 0444 }
+func (f *vfsgen۰CompressedFileInfo) ModTime() time.Time { return f.modTime }
+func (f *vfsgen۰CompressedFileInfo) IsDir() bool        { return false }
+func (f *vfsgen۰CompressedFileInfo) Sys() interface{}   { return nil }
+
+// vfsgen۰CompressedFile is an opened compressedFile instance.
+type vfsgen۰CompressedFile struct {
+	*vfsgen۰CompressedFileInfo
+	gr      *gzip.Reader
+	grPos   int64 // Actual gr uncompressed position.
+	seekPos int64 // Seek uncompressed position.
+}
+
+func (f *vfsgen۰CompressedFile) Read(p []byte) (n int, err error) {
+	if f.grPos > f.seekPos {
+		// Rewind to beginning.
+		err = f.gr.Reset(bytes.NewReader(f.compressedContent))
+		if err != nil {
+			return 0, err
+		}
+		f.grPos = 0
+	}
+	if f.grPos < f.seekPos {
+		// Fast-forward.
+		_, err = io.CopyN(ioutil.Discard, f.gr, f.seekPos-f.grPos)
+		if err != nil {
+			return 0, err
+		}
+		f.grPos = f.seekPos
+	}
+	n, err = f.gr.Read(p)
+	f.grPos += int64(n)
+	f.seekPos = f.grPos
+	return n, err
+}
+func (f *vfsgen۰CompressedFile) Seek(offset int64, whence int) (int64, error) {
+	switch whence {
+	case io.SeekStart:
+		f.seekPos = 0 + offset
+	case io.SeekCurrent:
+		f.seekPos += offset
+	case io.SeekEnd:
+		f.seekPos = f.uncompressedSize + offset
+	default:
+		panic(fmt.Errorf("invalid whence value: %v", whence))
+	}
+	return f.seekPos, nil
+}
+func (f *vfsgen۰CompressedFile) Close() error {
+	return f.gr.Close()
+}
+
+// vfsgen۰DirInfo is a static definition of a directory.
+type vfsgen۰DirInfo struct {
+	name    string
+	modTime time.Time
+	entries []os.FileInfo
+}
+
+func (d *vfsgen۰DirInfo) Read([]byte) (int, error) {
+	return 0, fmt.Errorf("cannot Read from directory %s", d.name)
+}
+func (d *vfsgen۰DirInfo) Close() error               { return nil }
+func (d *vfsgen۰DirInfo) Stat() (os.FileInfo, error) { return d, nil }
+
+func (d *vfsgen۰DirInfo) Name() string       { return d.name }
+func (d *vfsgen۰DirInfo) Size() int64        { return 0 }
+func (d *vfsgen۰DirInfo) Mode() os.FileMode  { return 0755 | os.ModeDir }
+func (d *vfsgen۰DirInfo) ModTime() time.Time { return d.modTime }
+func (d *vfsgen۰DirInfo) IsDir() bool        { return true }
+func (d *vfsgen۰DirInfo) Sys() interface{}   { return nil }
+
+// vfsgen۰Dir is an opened dir instance.
+type vfsgen۰Dir struct {
+	*vfsgen۰DirInfo
+	pos int // Position within entries for Seek and Readdir.
+}
+
+func (d *vfsgen۰Dir) Seek(offset int64, whence int) (int64, error) {
+	if offset == 0 && whence == io.SeekStart {
+		d.pos = 0
+		return 0, nil
+	}
+	return 0, fmt.Errorf("unsupported Seek in directory %s", d.name)
+}
+
+func (d *vfsgen۰Dir) Readdir(count int) ([]os.FileInfo, error) {
+	if d.pos >= len(d.entries) && count > 0 {
+		return nil, io.EOF
+	}
+	if count <= 0 || count > len(d.entries)-d.pos {
+		count = len(d.entries) - d.pos
+	}
+	e := d.entries[d.pos : d.pos+count]
+	d.pos += count
+	return e, nil
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..c2a4217
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,24 @@
+module github.com/ehlxr/hex-convert
+
+require (
+	github.com/BurntSushi/toml v0.3.0 // indirect
+	github.com/davecgh/go-spew v1.1.0 // indirect
+	github.com/fsnotify/fsnotify v1.4.7 // indirect
+	github.com/hashicorp/hcl v0.0.0-20180404174102-ef8a98b0bbce // indirect
+	github.com/inconshreveable/mousetrap v1.0.0 // indirect
+	github.com/magiconair/properties v1.8.0 // indirect
+	github.com/mitchellh/go-homedir v0.0.0-20180523094522-3864e76763d9
+	github.com/mitchellh/mapstructure v0.0.0-20180715050151-f15292f7a699 // indirect
+	github.com/pelletier/go-toml v1.2.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/spf13/afero v1.1.1 // indirect
+	github.com/spf13/cast v1.2.0 // indirect
+	github.com/spf13/cobra v0.0.3
+	github.com/spf13/jwalterweatherman v0.0.0-20180109140146-7c0cea34c8ec // indirect
+	github.com/spf13/pflag v1.0.1 // indirect
+	github.com/spf13/viper v1.0.2
+	github.com/stretchr/testify v1.2.2 // indirect
+	golang.org/x/sys v0.0.0-20180727230415-bd9dbc187b6e // indirect
+	golang.org/x/text v0.3.0 // indirect
+	gopkg.in/yaml.v2 v2.2.1 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..ce92fa5
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,42 @@
+github.com/BurntSushi/toml v0.3.0 h1:e1/Ivsx3Z0FVTV0NSOv/aVgbUWyQuzj7DDnFblkRvsY=
+github.com/BurntSushi/toml v0.3.0/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
+github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/hashicorp/hcl v0.0.0-20180404174102-ef8a98b0bbce h1:xdsDDbiBDQTKASoGEZ+pEmF1OnWuu8AQ9I8iNbHNeno=
+github.com/hashicorp/hcl v0.0.0-20180404174102-ef8a98b0bbce/go.mod h1:oZtUIOe8dh44I2q6ScRibXws4Ajl+d+nod3AaR9vL5w=
+github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
+github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
+github.com/magiconair/properties v1.8.0 h1:LLgXmsheXeRoUOBOjtwPQCWIYqM/LU1ayDtDePerRcY=
+github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
+github.com/mitchellh/go-homedir v0.0.0-20180523094522-3864e76763d9 h1:Y94YB7jrsihrbGSqRNMwRWJ2/dCxr0hdC2oPRohkx0A=
+github.com/mitchellh/go-homedir v0.0.0-20180523094522-3864e76763d9/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
+github.com/mitchellh/mapstructure v0.0.0-20180715050151-f15292f7a699 h1:KXZJFdun9knAVAR8tg/aHJEr5DgtcbqyvzacK+CDCaI=
+github.com/mitchellh/mapstructure v0.0.0-20180715050151-f15292f7a699/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
+github.com/pelletier/go-toml v1.2.0 h1:T5zMGML61Wp+FlcbWjRDT7yAxhJNAiPPLOFECq181zc=
+github.com/pelletier/go-toml v1.2.0/go.mod h1:5z9KED0ma1S8pY6P1sdut58dfprrGBbd/94hg7ilaic=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/spf13/afero v1.1.1 h1:Lt3ihYMlE+lreX1GS4Qw4ZsNpYQLxIXKBTEOXm3nt6I=
+github.com/spf13/afero v1.1.1/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B0CQ=
+github.com/spf13/cast v1.2.0 h1:HHl1DSRbEQN2i8tJmtS6ViPyHx35+p51amrdsiTCrkg=
+github.com/spf13/cast v1.2.0/go.mod h1:r2rcYCSwa1IExKTDiTfzaxqT2FNHs8hODu4LnUfgKEg=
+github.com/spf13/cobra v0.0.3 h1:ZlrZ4XsMRm04Fr5pSFxBgfND2EBVa1nLpiy1stUsX/8=
+github.com/spf13/cobra v0.0.3/go.mod h1:1l0Ry5zgKvJasoi3XT1TypsSe7PqH0Sj9dhYf7v3XqQ=
+github.com/spf13/jwalterweatherman v0.0.0-20180109140146-7c0cea34c8ec h1:2ZXvIUGghLpdTVHR1UfvfrzoVlZaE/yOWC5LueIHZig=
+github.com/spf13/jwalterweatherman v0.0.0-20180109140146-7c0cea34c8ec/go.mod h1:cQK4TGJAtQXfYWX+Ddv3mKDzgVb68N+wFjFa4jdeBTo=
+github.com/spf13/pflag v1.0.1 h1:aCvUg6QPl3ibpQUxyLkrEkCHtPqYJL4x9AuhqVqFis4=
+github.com/spf13/pflag v1.0.1/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
+github.com/spf13/viper v1.0.2 h1:Ncr3ZIuJn322w2k1qmzXDnkLAdQMlJqBa9kfAH+irso=
+github.com/spf13/viper v1.0.2/go.mod h1:A8kyI5cUJhb8N+3pkfONlcEcZbueH6nhAm0Fq7SrnBM=
+github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+golang.org/x/sys v0.0.0-20180727230415-bd9dbc187b6e h1:3dQ4fR8k5KugjVKO0oqSd1odxuk2yaE2CIfxWP2WarQ=
+golang.org/x/sys v0.0.0-20180727230415-bd9dbc187b6e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..183e88c
--- /dev/null
+++ b/main.go
@@ -0,0 +1,27 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package main // import "github.com/ehlxr/hex-convert"
+
+import "github.com/ehlxr/hex-convert/cmd"
+
+func main() {
+	cmd.Execute()
+}
diff --git a/metadata/metadata.go b/metadata/metadata.go
new file mode 100644
index 0000000..d7a387c
--- /dev/null
+++ b/metadata/metadata.go
@@ -0,0 +1,25 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package metadata
+
+const VERSION = "v0.0.1"
+
+var TEN_TO_ANY map[int]string = map[int]string{0: "0", 1: "1", 2: "2", 3: "3", 4: "4", 5: "5", 6: "6", 7: "7", 8: "8", 9: "9", 10: "a", 11: "b", 12: "c", 13: "d", 14: "e", 15: "f", 16: "g", 17: "h", 18: "i", 19: "j", 20: "k", 21: "l", 22: "m", 23: "n", 24: "o", 25: "p", 26: "q", 27: "r", 28: "s", 29: "t", 30: "u", 31: "v", 32: "w", 33: "x", 34: "y", 35: "z", 36: ":", 37: ";", 38: "<", 39: "=", 40: ">", 41: "?", 42: "@", 43: "[", 44: "]", 45: "^", 46: "_", 47: "{", 48: "|", 49: "}", 50: "A", 51: "B", 52: "C", 53: "D", 54: "E", 55: "F", 56: "G", 57: "H", 58: "I", 59: "J", 60: "K", 61: "L", 62: "M", 63: "N", 64: "O", 65: "P", 66: "Q", 67: "R", 68: "S", 69: "T", 70: "U", 71: "V", 72: "W", 73: "X", 74: "Y", 75: "Z"}
diff --git a/server/server.go b/server/server.go
new file mode 100644
index 0000000..4c980dd
--- /dev/null
+++ b/server/server.go
@@ -0,0 +1,96 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package server
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+	"strconv"
+	"strings"
+
+	"github.com/ehlxr/hex-convert/gen"
+
+	"github.com/ehlxr/hex-convert/converter"
+)
+
+func decimal(w http.ResponseWriter, req *http.Request) {
+	scale, _ := strconv.Atoi(req.FormValue("scale"))
+	data := req.FormValue("data")
+
+	result, err := converter.ToDecimal(scale, data)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+
+	log.Println(result)
+	fmt.Fprintf(w, "<a href='/'>首页</a><br> %s", strconv.Itoa(result))
+}
+
+func binary(w http.ResponseWriter, req *http.Request) {
+	scale, _ := strconv.Atoi(req.FormValue("scale"))
+	data := req.FormValue("data")
+
+	result, err := converter.ToBinary(scale, data)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+
+	log.Println(result)
+	fmt.Fprintf(w, "<a href='/'>首页</a><br> %s", result)
+}
+
+func index(w http.ResponseWriter, r *http.Request) {
+	f, err := gen.Assets.Open("/index.tpl")
+	if err != nil {
+		log.Fatalln(err)
+	}
+	defer f.Close()
+
+	fd, err := ioutil.ReadAll(f)
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Fprintf(w, string(fd))
+}
+
+func Start(host string, port int) error {
+	http.HandleFunc("/", index)
+	http.HandleFunc("/d", decimal)
+	http.HandleFunc("/b", binary)
+
+	addr := fmt.Sprintf("%s:%d", host, port)
+	if strings.Contains(addr, "0.0.0.0") {
+		addr = strings.Replace(addr, "0.0.0.0", "", 1)
+		host = strings.Replace(host, "0.0.0.0", "127.0.0.1", 1)
+	}
+	fmt.Printf("server start on: %s", fmt.Sprintf("http://%s:%d", host, port))
+
+	if err := http.ListenAndServe(addr, nil); err != nil {
+		return fmt.Errorf("ListenAndServe: : %v", err)
+	}
+	return nil
+}