JWT Decoder — Free Online
Inspect headers, payloads and expiry. Works in your browser, no install needed.
Free with a CeevTech Tools account — no credit card required.
How to use JWT Decoder
Paste the JWT (the long string starting with "eyJ…").
Click decode to see the header and payload as readable JSON.
Read the claims, or copy them for your notes.
Why use CeevTech JWT Decoder?
Debugging an authentication problem? CeevTech JWT Decoder splits a JSON Web Token into its header and payload and shows the claims (user ID, roles, expiry time) as readable JSON. Decoding happens in your browser, so the token is never sent to a third party.
- Fast: processes your code or data in seconds.
- Private: runs in your browser, so nothing is uploaded.
- Works everywhere: desktop, tablet and phone, in any modern browser.
- One account, 79+ tools: PDF, image, office, AI, developer and business tools in one place.
Frequently asked questions
Does decoding verify the signature?
No. Decoding only reads the header and payload, which anyone can do. Signature verification needs the secret key and should happen on your server.
Is it safe to paste a real token?
With this tool the token never leaves your browser. Still, treat live tokens like passwords and avoid sharing them.
Is JWT Decoder free?
Free with a CeevTech Tools account — no credit card required.
Do I need to install anything?
No. JWT Decoder runs online in your browser on Windows, Mac, Linux, Android and iPhone.
Is my data private?
Yes. JWT Decoder runs entirely in your browser, so your data never leaves your device.