DevConvertor

Security & Cryptography Tools

These tools help developers inspect authentication tokens and generate hashes for integrity checks. Decoding a JWT reveals its header and payload claims but does not verify its signature — a decoded token should never be treated as a validated one. Hash generators are provided for checksums and comparisons, not for password storage.

Common use cases

  • Inspecting the claims, expiration, and issuer inside a JWT during debugging
  • Generating a SHA-256 checksum to verify a file or string wasn't altered
  • Comparing two pieces of text by their hash instead of reading them character by character
  • Understanding what algorithm and claims a third-party API's token actually uses

Tools

JWT Decoder

Decode a JWT's header and payload — without verifying its signature.

JWT Inspector

A deeper look at a JWT's structure, sizes, and expiration status.

JWT Generator

Encode and HMAC-sign a JWT for testing, entirely in your browser.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, or SHA-512 hashes.

SHA256 Generator

Generate a SHA-256 hash from text or a file.

MD5 Generator

Generate an MD5 hash — for legacy compatibility, not security.