πŸ”‘
πŸ”

Debug Authentication Issues with JWT Decoder

Inspect JWTs from your app to debug login failures, permission issues, and token expiration problems.

Nid oes angen mewngofnodi

πŸ”’ The token is decoded entirely in your browser. Nothing is sent to any server.

Auth Debugging tips

πŸ”

When users report "I keep getting logged out," paste their token here to check the `exp` claim. Most session expiry bugs are off-by-one errors in token TTL config.

πŸ’‘

Check the `iat` (issued at) claim to see if tokens are being refreshed correctly. If `iat` is hours old when it should be minutes, your refresh flow is broken.

πŸ”

Look at the `aud` (audience) claim β€” many auth failures happen when a token issued for one service is sent to another that has different audience validation.

⚠️

Tokens are decoded entirely in your browser β€” safe to use for production tokens during debugging. The decoder never sees them server-side.

Sut Mae'n Gweithio

1
Ewch i mewn
Enter your data into the tool above. Everything stays local to your browser.
2
Proses
The tool processes your data instantly in your browser using JavaScript. No server, no waiting.
3
Lawrlwythwch
Get your result instantly. Nothing is stored after you leave the page β€” complete privacy.

Pam defnyddio ein un ni?

βœ“Hollol rhad ac am ddim - dim costau cudd, byth
βœ“Nid oes angen cyfrif, e-bost na mewngofnodi
βœ“Nid yw ffeiliau byth yn gadael eich dyfais
βœ“Dim cyfyngiadau maint ffeil o gwbl
βœ“Dim dyfrnodau ar unrhyw allbwn

Also check out…

Cwestiynau Cyffredin