JWT Decoder Online - Decode Tokens Locally, No Upload

JWTs are the standard way apps prove who you are - but the token on screen is a gobbledygook string of base64. The JWT decoder unpacks it into readable JSON in a single paste, entirely on your device.

Quick answer

Open the JWT decoder, paste the token, read the decoded header + payload with an expiry check.

Step-by-step

1. Grab a JWT from a browser devtools → Network → Authorization header, or localStorage.
2. Paste it into getconvertify.me/tools/jwt.
3. Read the pretty-printed header (algorithm, token type) and payload (claims).
4. The tool flags exp as valid or EXPIRED.

What you're looking at

• Header - alg (signing algorithm) and typ (usually JWT).
• Payload - claims like sub, email, iat, exp.
• Signature - the third segment; shown but not verified.

Private by design

This is a paste-only, local tool. The token is decoded with plain JavaScript in your tab - it is never sent anywhere. That matters: JWTs often contain emails, user IDs, and scopes you shouldn't be pasting into random websites. Paste with confidence here.

Common questions

Can you verify the signature? No - verification needs the server's secret or public key. For that you'd use a proper debugger like jwt.io, which also runs client-side.

Is my token still valid? The tool checks expiry time against your clock and labels it valid or EXPIRED - but validity also depends on the signature and the server.

Need to see the raw base64? The header and payload are Base64url - the Base64 tool can decode them manually.

Decode a JWT now →