100% In-Browser & Private — your data never leaves this device

JWT Tools — Decode, Verify & Sign Tokens Online

Debugging auth flows usually means jumping between a decoder, a signature checker, and a secret generator. PeachTools keeps the whole JWT workflow on one site with zero server uploads. Paste a token, verify it with your secret, then hop to the encoder to mint test tokens.

Decode, verify, and create JSON Web Tokens entirely in your browser. Production tokens never leave your device — verify signatures with HMAC or RSA public keys locally.

6 tools · 100% in-browser · All developer tools

JWT Decoder
Decode JSON Web Tokens instantly. View header, payload, signature, and expiration — 100% in your browser.

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JWT Encoder
Create HS256/384/512 (or unsigned) JSON Web Tokens from a JSON payload — private companion to the JWT Decoder.

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Secure Passphrase & Secret Generator
Generate cryptographically strong passwords, passphrases, API keys, UUIDs, and keypairs with Web Crypto — nothing is logged or uploaded.

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HMAC Generator
Compute HMAC-SHA1/256/512 signatures for webhooks and APIs — Web Crypto in your browser.

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Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 digests for text or files — Web Crypto in your browser, nothing uploaded.

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Base64 Encode / Decode
Encode or decode text as standard or URL-safe Base64 — private and instant.

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