What can I do with this free JWT tool?

You can decode any JWT (read header, payload and all claims), verify HMAC signatures (HS256/384/512) and RSA/EC signatures (RS256/PS256/ES256), use time travel to check expiration, and build new signed JWT tokens.

Are there any limitations?

No rate limits, no token length limits, no daily quotas. The tool runs entirely in your browser, so performance depends on your device. HMAC signing in the builder is supported; RSA/EC signing requires an external key pair.

Flowfiles ← JWT Decoder

Free JWT Decoder Online

Q: Is this JWT decoder really free?

Yes. The tool is completely free with no account, no sign-up, no trial, and no credit card. It is hosted as a static site on Cloudflare Pages and fully open to use.

Q: Do I need to create an account?

No account, sign-up, or email address is required. Open the page, paste your JWT, and start decoding immediately.

Decode · Verify · Build — no account · no sign-up · no limits — HS256 · RS256 · ES256 · PS256

A completely free JWT tool. Decode any JWT, verify signatures with HMAC secrets or RSA/EC public keys, check expiration with time travel, and build new tokens. No account, no email, no registration — just open the page and use it.

Access the full JWT tool — free, no account required

Open the JWT Decoder →

What you get for free

Decode — header, payload, and signature with JSON syntax highlighting
Claims panel — color-coded badges for exp, nbf, iat, iss, sub, aud, scope, jti, and more
Signature verification — HS256/384/512 with HMAC secret, RS/PS/ES 256/384/512 with PEM key
Time travel — check expiration/nbf at any past or future date
Builder — add claims, set algorithm, sign HS256 tokens, export unsigned payload for RS/ES
Export — copy header/payload JSON, download as .json, copy raw JWT

Frequently asked questions

Is this JWT decoder really free?

Yes. Completely free, forever. No freemium plan, no API credits, no account. The site is a static page hosted on Cloudflare Pages with no usage limits.

What algorithms does it support?

HS256, HS384, HS512 (HMAC-SHA), RS256, RS384, RS512 (RSA-PKCS1), PS256, PS384, PS512 (RSA-PSS), and ES256, ES384, ES512 (ECDSA). Decoding works with any well-formed JWT regardless of algorithm.

Do I need to create an account?

No. No account, no email, no Google sign-in. Just open the page and start using it immediately.

Are there rate limits or token size limits?

No. The tool runs entirely in your browser, so there is no server to rate-limit. Performance depends on your device and browser, but typical JWTs are decoded instantly.

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