DevKits vs jwt.io
jwt.io is the gold standard for JWT inspection — trusted by Auth0 and the broader auth community. DevKits offers the same JWT decoding alongside 100+ tools, so you stop bouncing between tabs during API debugging sessions.
Quick Verdict
Choose DevKits if you...
- ✓ Debug APIs and need JWT + JSON + Base64 + headers in one place
- ✓ Want to reduce tab sprawl during development
- ✓ Need JWT alongside other security and encoding tools
- ✓ Want a fully offline-capable (PWA) toolkit
- ✓ Prefer a curated set of tools with learning guides
Choose jwt.io if you...
- ✓ Need the most complete JWT library list by language/framework
- ✓ Want deep JWT signature verification with custom secrets
- ✓ Need a tool that is the canonical reference for JWT
- ✓ Want to cross-reference algorithm support across libraries
The 10-Tab Problem
A typical API debugging session: your JWT is failing. Here's how many tabs you'd open without DevKits:
Typical tool tab sprawl:
- jwt.io — decode the token
- base64decode.org — decode the payload manually
- jsonlint.com — validate the decoded JSON
- unixtimestamp.com — check expiry timestamp
- curl command in terminal — test the endpoint
- Google — look up the error code in the response
6 tabs. All context switching.
With DevKits:
- Open DevKits
- JWT Decoder — decode and inspect the token
- Switch to JSON Formatter — validate the payload
- Switch to Timestamp Converter — check expiry
1 tab. All tools in one place.
Feature Comparison
| Feature | DevKits | jwt.io |
|---|---|---|
| JWT Decode (Header + Payload) | Yes | Yes |
| Signature Verification | Yes | Yes (more in-depth) |
| JWT Encoding / Generation | Yes | Yes |
| JWT Libraries by Language | Via guides | Extensive curated list |
| Algorithm Support Matrix | Limited | HS256, RS256, ES256, and more |
| Base64 Encode/Decode | Dedicated tool | No |
| JSON Formatter / Validator | Yes | No |
| Unix Timestamp Converter | Yes | No |
| Hash Generator (SHA-256 etc.) | Yes | No |
| Offline Mode (PWA) | Yes | No |
| Privacy | All client-side | All client-side |
| Pricing | Free + $9 Pro | Free |
DevKits Strengths
- → No Tab Switching: Decode your JWT, validate the JSON payload, convert the expiry timestamp, and hash-check the secret — all without leaving the page.
- → Offline-Ready: Install as a PWA and use JWT tools and all 100+ other tools even without an internet connection.
- → Learning Resources: JWT concepts, claims reference, and security guides available alongside the tool itself.
- → Companion Tools: After decoding a JWT, use URL Decoder, JSON Formatter, or Hash Generator in the same session.
jwt.io Strengths
- → JWT Authority: Maintained by Auth0, the canonical reference for JWT. Trusted by millions of developers worldwide.
- → Library Directory: Comprehensive, regularly updated list of JWT libraries for every language and framework.
- → Algorithm Depth: Detailed algorithm comparison — which libraries support RS256, ES256, PS256, and more.
- → Simplicity: Dedicated, focused tool for JWT. Zero distraction, zero navigation overhead.
When to Use Each Tool
Use DevKits For:
- • Debugging auth issues during API development
- • JWT + JSON + timestamp work in one session
- • Offline JWT inspection (airport, no WiFi)
- • Understanding JWT concepts with integrated guides
- • When JWT is one of many tools you need right now
Use jwt.io For:
- • Deep JWT library research by language
- • Cross-referencing algorithm support across libraries
- • Sharing a reference link with your team about JWT
- • The most complete, authoritative JWT decoder
Stop Juggling 10 Tabs
JWT decoder, JSON formatter, Base64, timestamp converter and 100+ more developer tools in one place. No signup. Works offline.
Try DevKits Free →