JWT Decoder & Verifier
Decode JWT tokens, inspect claims, and verify HS256, HS384, or HS512 signatures online without exposing secrets.
Secrets are used locally via the Web Crypto API.
Token breakdown
JWTs consist of three Base64URL segments: header, payload, and signature. Each segment is decoded locally and never leaves your browser.
Need to debug tokens from production? Paste them directly—no data is sent to Batch Toolkit.
- Always check the expiry before trusting a token in tooling workflows.
- Verify signatures using known secrets when debugging authentication flows.
- JWTs often include sensitive claims—avoid sharing decoded payloads publicly.
Keep your flow going
A few more tools that might come in handy.
TOTP Authenticator Generator
Generate TOTP 2FA codes online from Base32 secrets with live countdowns, SHA-1/SHA-256/SHA-512 support, and otpauth links.
JWT Generator
Build and sign JSON Web Tokens online with editable headers, payload claims, and HS256/HS384/HS512 signatures generated locally.
Password Generator
Generate strong random passwords online with custom length, character sets, and passphrase options powered by secure randomness.
SSH Key Generator
Generate secure SSH key pairs online (Ed25519, RSA, ECDSA) with OpenSSH-ready output, fingerprints, and PEM downloads.