TinyTool vs JWT.io
JWT.io is Auth0's dedicated JSON Web Token debugger and decoder — the go-to tool for inspecting, verifying, and understanding JWTs.
JSON Web Tokens are everywhere in modern authentication — from OAuth flows and single sign-on to API authorization. When something goes wrong with a JWT, a good decoder is the fastest way to understand what happened.
JWT.io, built by Auth0 (now Okta), is the industry-standard JWT debugger. Paste a token and it instantly shows the decoded header and payload, color-coded by section. It also supports signature verification with a shared secret or public key, and its library directory helps developers find JWT implementations in every major language.
TinyTool's JWT Decoder provides the same core functionality — paste a token, see the decoded header and payload with syntax highlighting, and verify signatures — plus it is part of a broader developer toolkit with 80+ tools including Base64, JSON formatter, hash generators, regex tester, and more. Both tools decode client-side, but TinyTool ensures your token data stays in your browser tab without any third-party scripts beyond what is needed for the tool itself.
| Feature | TinyTool | JWT.io |
|---|---|---|
| JWT decoding | Yes — instant decode of header and payload | Yes — color-coded by section |
| Signature verification | Yes — HS256, RS256 | Yes — multiple algorithms |
| Privacy | ✓ 100% client-side, no third-party analytics on tool page | Client-side decode, but page includes third-party scripts |
| Price | Free | Free |
| Sign-up required | No | No |
| JWT library directory | No | ✓ Yes — lists libraries for 15+ languages |
| Token generation | No | ✓ Partial — edit payload and re-encode |
| Dark mode | ✓ Yes — system-aware dark/light theme | No |
| Additional dev tools | ✓ 80+ tools — Base64, JSON, hash, regex, timestamp, UUID | Single-purpose JWT tool |
| Mobile experience | ✓ Fully responsive mobile-first design | Desktop-optimised layout |
Privacy advantage
TinyTool processes everything 100% in your browser. Your files are never uploaded to any server. No account needed, no usage limits, and no data collection. When you close the tab, your data is gone.
The verdict
Both tools decode JWTs instantly and client-side. JWT.io is the industry standard and adds a useful library directory and payload editing. TinyTool is the better choice if you want a clean, private experience with dark mode and mobile support, and you value having Base64, JSON formatting, hash generation, and 80+ other dev tools in the same place — no need to keep ten browser tabs open.
Frequently asked questions
Is JWT.io safe to paste tokens into?
JWT.io decodes tokens client-side in your browser, so the token content is not sent to Auth0's servers for decoding. However, the page does include third-party analytics and tracking scripts. TinyTool minimises external scripts on tool pages, keeping your token data as private as possible.
Can TinyTool verify JWT signatures?
Yes. TinyTool's JWT Decoder supports signature verification for common algorithms including HS256 and RS256. Paste your secret or public key and the tool will verify the signature entirely in your browser.
Does JWT.io support all JWT algorithms?
JWT.io supports a wide range of algorithms including HS256, HS384, HS512, RS256, RS384, RS512, ES256, ES384, ES512, and PS256. TinyTool covers the most commonly used algorithms (HS256, RS256) which handle the vast majority of real-world JWTs.
Why use TinyTool instead of JWT.io?
If you already have a tab open with TinyTool for JSON formatting, Base64 encoding, or hash generation, decoding a JWT there saves opening yet another tab. TinyTool also offers a cleaner interface with dark mode support and a mobile-friendly layout — useful when debugging on the go.