jwtd

README

jwtd

A CLI tool that decodes and pretty-prints JSON Web Tokens (JWTs) with syntax-highlighted JSON output.

Features

• Decode any JWT and display its header, payload, and signature
• Syntax-highlighted JSON output with a consistent color scheme
• Automatic conversion of iat, exp, and nbf timestamps to human-readable RFC3339 dates
• Accepts tokens as arguments, from stdin pipes, or via an interactive prompt
• Colors auto-disable when output is not a TTY

Installation

Homebrew (macOS and Linux)

brew install webcodr/tap/jwtd

From source

Requires Go 1.26+.

go install github.com/webcodr/jwtd@latest

From releases

Download a prebuilt binary from the Releases page. Binaries are available for:

• Linux (amd64, arm64)
• macOS (amd64, arm64)
• Windows (amd64, arm64)

Usage

Pass a token as an argument:

jwtd eyJhbGciOiJIUzI1NiIs...

Pipe a token from stdin:

echo eyJhbGciOiJIUzI1NiIs... | jwtd

Or run without arguments for an interactive prompt:

jwtd
Enter JWT: _

Output

jwtd prints three sections — Header, Payload, and Signature — with colored, indented JSON:

Element	Color
Keys	Bold blue
Strings	Green
Numbers	Yellow
Booleans	Magenta
Null	Red
Labels	Bold cyan
Signature	Dim

Development

Build

go build -o jwtd .

Test

go test -v ./...

License

MIT