A jwt.io alternative with more than JWTs
jwt.io is the well-known JWT debugger from Auth0/Okta, and — importantly — it already runs client-side. So this is not a privacy pitch. It is an honest comparison for when you want JWT tools alongside the rest of your everyday toolkit, with no account prompts.
What is jwt.io?
jwt.io is a free JWT debugger operated by Auth0 (owned by Okta). It decodes a token’s header and payload, verifies the signature, and can generate/sign tokens. Its own guidance states "all validation and debugging is done on the client side", and it hosts a cross-language JWT libraries directory. Using the debugger does not require an account, though the site promotes Auth0 sign-up and shows ad/cookie preferences.
Daily Developer Tools includes JWT decoding, verification and signing as part of a broader set of 66 tools — so a JWT sits next to JSON, cURL, HAR, SQL and regex tools, with tool-to-tool handoff and no vendor upsell.
Feature comparison
Every claim below was checked against jwt.io’s own pages (linked under Sources). Where a fact can change over time, the prose says so.
| Feature | Daily Developer Tools | jwt.io |
|---|---|---|
| Decode JWT header and payload in the browser | Yes | Yes |
| Verify a JWT signature | Yes | Yes |
| Generate / sign a JWT | Yes — JWT & OAuth Toolkit | Yes |
| Processing stays client-side | Yes | Yes — "all validation and debugging is done on the client side" |
| Part of a broader multi-tool toolkit | Yes — 66 tools | Focused on JWTs |
| Cross-language JWT libraries directory | No | Yes — a dedicated libraries page |
| In-depth JWT learning material | Per-tool guides | Yes — the JWT Handbook |
| No account prompts, ad partners or vendor upsell | Yes | Auth0/Okta property with sign-up promotion and cookie/ad preferences |
| Hand off a decoded payload straight into other tools | Yes — workflows | No |
jwt.io states it processes tokens client-side, and so does this site — so privacy is not the difference here. The difference is breadth, workflows, and the absence of a vendor/account wrapper.
What jwt.io does better
- A deep, dedicated focus on JWTs, backed by Auth0/Okta.
- A cross-language libraries directory to find a JWT library in your language.
- The free JWT Handbook and rich educational content.
Which should you use?
Use jwt.io: Choose jwt.io when you want the canonical, JWT-dedicated debugger and its libraries directory and handbook.
Use Daily Developer Tools: Choose Daily Developer Tools when you want JWT decoding/verifying/signing alongside JSON, cURL, HAR and 60+ other tools, with tool-to-tool workflows and no account or ad prompts.
Try these tools
Sources
Facts about jwt.io on this page were verified on 2026-07-08 against its official pages: