What is jwt.io?
jwt.io lets you decode, verify and generate JSON Web Tokens. Paste a token and it splits it into header, payload and signature, showing the claims in readable JSON.
You can enter a secret or public key to check whether the signature is valid. The site also lists JWT libraries for many programming languages.
Key features
- Decode header and payload
- Verify signatures with a secret or key
- Edit claims and re-sign tokens
- Library list for many languages
Pros
- Instant decoding
- Standard reference for JWT
- Runs in the browser
Cons
- Do not paste production secrets anywhere online
- Focused on JWT only
Best for
Debugging authentication issuesInspecting token claims and expiryLearning how JWTs work
Ratings and reviews
No reviews yet. Community ratings and reviews are coming soon, so you can share how jwt.io worked for you.
jwt.io FAQ
Is jwt.io free?
jwt.io is free with no account.
Do I need an account to use jwt.io?
No. jwt.io works without signing up, so you can open jwt.io and start using it right away.
What are some alternatives to jwt.io?
Similar free tools that also work without an account include Regex101, CyberChef, Crontab Guru, Transform, JSON Crack and Carbon.