diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..53c37a1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+dist
\ No newline at end of file
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..47f4396
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,39 @@
+# https://golang.org/doc/install/source#environment
+GOOS := $(shell go env | awk -F= '$$1=="GOOS" {print $$2}' | awk -F '"' '{print $$2}') # 此处 awk 需使用两个 $
+GOARCH := $(shell go env | awk -F= '$$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 $(GOARCH)).exe
+# endif
+
+.PHONY: build
+build:
+	@ go build -ldflags "-s -w" -o dist/jwt_$(strip $(GOOS))_$(strip $(if \
+    $(findstring windows,$(GOOS)),\
+    $(strip $(GOARCH)).exe,\
+    $(strip $(GOARCH))\
+	))
+
+.PHONY: amd64
+amd64:
+	@ $(foreach OS,\
+	$(OSS),\
+	$(shell CGO_ENABLED=0 GOOS=$(OS) GOARCH=amd64 go build -ldflags "-s -w" -o dist/jwt_$(OS)_amd64$(if $(findstring windows,$(OS)),.exe)))
+	@ echo done
+
+.PHONY: 386
+386:
+	@ $(foreach OS,\
+	$(OSS),\
+	$(shell CGO_ENABLED=0 GOOS=$(OS) GOARCH=386 go build -ldflags "-s -w" -o dist/jwt_$(OS)_386$(if $(findstring windows,$(OS)),.exe)))
+	@ echo done
+
+.PHONY: clean
+clean:
+	@ rm -rf dist/jwt* jbls
+
+# 压缩。需要安装 https://github.com/upx/upx
+.PHONY: upx
+upx:
+	@ upx $(if $(PKG),$(PKG),dist/jwt*)
\ No newline at end of file
diff --git a/README.md b/README.md
index 5b5f0a5..e372406 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,2 @@
-# jwt
\ No newline at end of file
+# JWT
+> This is a simple tool to sign, verify and show JSON Web Tokens ([JWT](http://jwt.io/)) from the command line, base [jwt-go](https://github.com/dgrijalva/jwt-go).