JWT Decoder
Decode and inspect JSON Web Tokens. View header, payload, and expiration status.
Paste a JWT token above to decode it instantly.
Everything runs in your browser — no data is sent to any server.
Need API access to JWT Decoder?
Integrate this tool into your workflow with our REST API. 3 free requests/day, unlimited with Pro.
What is JWT Decoder?
Paste any JWT token to instantly decode and inspect its header, payload, and signature. See human-readable claim explanations, expiration status, and validation warnings. Color-coded token parts make it easy to understand the structure. Like jwt.io but faster and cleaner. All decoding happens client-side.
AllKit's JWT Decoder is completely free with no signup required. All processing happens directly in your browser — your data is never sent to any server, making it safe for sensitive information.
Why use AllKit?
- No ads, no distractions — a clean interface that lets you focus on the task
- Privacy-first — 100% client-side processing, nothing is uploaded
- Free forever — core tools are free with no usage limits
- API available — integrate into your workflow via our REST API
Frequently Asked Questions
What is a JWT?▾
A JSON Web Token (JWT) is a compact, URL-safe token format used for authentication and information exchange. It contains three parts: a header (algorithm info), payload (claims/data), and signature (verification).
Is it safe to paste my JWT here?▾
Yes. Decoding happens entirely in your browser — the token is never sent to any server. However, note that JWTs are only encoded (Base64), not encrypted — anyone with the token can read its contents.
Can this tool verify JWT signatures?▾
This tool decodes and displays JWT contents but does not verify signatures, as that requires the secret key or public key used to sign the token. It will flag expired tokens and show all claims.