JWT.io vs BrowserUtils

Quick comparison

Checked November 14, 2026

Where JWT.io is better

• Verifies signatures for HS, RS, ES and PS algorithms (256/384/512) and EdDSA. It accepts public keys as SPKI/PEM, PKCS #1, X.509 certificates or JWK. BrowserUtils' JWT decoder shows the header and payload but doesn't check the signature.
• Can fetch the issuer's public key on its own (using the token's iss claim and the OpenID configuration/JWKS endpoint) to verify a token without pasting a key.
• Its encoder signs with private keys (PKCS #8, PKCS #1 or JWK) as well as shared secrets. BrowserUtils' JWT builder supports only HS256, HS384 and HS512.
• A libraries directory lists JWT libraries for each language, with which claims and algorithms each one supports.

Where BrowserUtils is better

• Paste a token into the BrowserUtils homepage box and it shows the header, the payload and the expiry time (including how long until it expires) before you open any tool.
• From that same box, one click sends the decoded payload to the JSON formatter or the JSON-to-TypeScript converter.
• Covers other auth formats on the same site: a SAML response decoder, a TOTP code generator and bcrypt hashing.
• Base64 and HMAC tools sit alongside, so you can check a token's parts or a signature by hand.

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