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Tools tagged "JWT"
3 tools
Tools to decode, verify, and create JSON Web Tokens.
All NoSend Tools that carry the "JWT" tag. Everything runs inside the browser — your inputs never leave your device.
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JWT decode — inspect header & payload
Paste a JWT and break it down into Header / Payload / Signature. Numeric claims like exp / iat / nbf are translated into human-readable timestamps. No signature verification — purely for inspection. Runs entirely in your browser.
developerJWTdecode
JWT Encode (sign) — HMAC / RSA / ECDSA via Web Crypto
Generate (sign) a JWT (JSON Web Token) entirely in your browser using the Web Crypto API. Supports HS256 / HS384 / HS512 (HMAC), RS256 / RS384 / RS512 (RSASSA-PKCS1-v1_5), PS256 / PS384 / PS512 (RSA-PSS), and ES256 / ES384 / ES512 (ECDSA P-256/P-384/P-521). Provide Header / Payload as JSON (with optional auto-fill for `exp` / `iat` / `nbf`), and a key — a string for HMAC, or a PKCS#8 PEM / JWK for asymmetric. Output is the standard `header.payload.signature` JWT which can be pasted straight into jwt-decode / jwt-verify. Secrets and payloads stay in your browser.
developerJWTsecuritygenerate
JWT signature verify — HMAC / RSA / ECDSA
Verify a JWT signature using WebCrypto — supports HS / RS / PS / ES with SHA-256/384/512. Paste an HMAC secret for HS*, or an SPKI PEM / JWK public key for RSA / ECDSA. exp / nbf are checked alongside the signature. Nothing leaves your browser.
developerJWTsecurity