Yes. All 42 tools are 100% free with no signup, no ads in your face, and no hidden limits. The core tools will always be free.

Do AHX tools upload my data to a server?

No. Every tool runs entirely in your browser using JavaScript. Your data never leaves your device.

Can I use AHX offline?

Yes. Once the page has loaded, every tool works without an internet connection. AHX is installable as a PWA.

Yes. JWT Decoder is 100% free with no signup and no usage limits.

Does JWT Decoder upload my data?

No. JWT Decoder runs entirely in your browser. Your data never leaves your device.

Do I need to install anything?

No. JWT Decoder works in any modern web browser. Just visit the page and start using it.

AHX

JWT Decoder

Decode JWT tokens. Inspect header, payload, and signature.

JWT Token

Runs entirely in your browser. No data leaves your device.

About JWT Decoder

Decode JSON Web Tokens (JWT) instantly. Paste a JWT and see the decoded header, payload, and signature. Useful for debugging authentication flows, OAuth tokens, and API authorization. Everything runs in your browser.

Common use cases

Debug authentication tokens
Inspect OAuth/OIDC tokens
Verify JWT claims and expiration
Troubleshoot API auth issues

Auth0 — managed JWT auth

affiliate

Shipping JWT auth in production? Auth0 handles rotation, revocation, and OIDC so you don't roll your own crypto.

auth0.com

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