JWT input
Note: this tool only decodes and shows header/payload. It does not verify signatures and never asks for secrets.
Structure info
Algorithm：
-
Type：
-
Expires (exp)：
-
Not before (nbf)：
-
Issued at (iat)：
-
Hint: exp/nbf/iat in JWT payload are typically Unix timestamps in seconds; this tool converts them into your local time.
Header
Payload
Signature
How to Use
1. Input Token: Paste your JWT string into the "JWT input" box on the left.
2. Auto Decode: The tool automatically parses the Header, Payload, and Signature segments.
3. View Details: The right side shows the decoded JSON for Header and Payload, along with structure info (algorithm, expiration, etc.).
4. Copy Result: Click the "Copy" button on each section to extract the content.
Tips & FAQ
Local & Secure All decoding is done locally in your browser. Your token is never uploaded to any server.
Timestamp Conversion The tool automatically converts Unix timestamps in the Payload (like `exp`, `nbf`, `iat`) into your local readable time format.
Signature Verification This tool is for decoding and display only. It does not verify signatures (as that would require your secret key, which we recommend against entering online).
