Security & Hashing

Decode and inspect JSON Web Token (JWT) headers, payloads, and claims locally in browser memory without signature verification.

Generate cryptographic hashes and message digests including SHA-256, SHA-512, SHA-384, SHA-1, and MD5 for text payloads.

Generate cryptographically secure passwords locally with configurable character sets.

Calculate non-cryptographic checksums and cyclic redundancy checks including CRC-32, CRC-32C, CRC-16, Adler-32, and BSD sum for data integrity verification.

Compute Hash-based Message Authentication Codes (HMAC) using SHA-256, SHA-512, SHA-384, SHA-1, and MD5 with custom secret keys.

Generate and decode HTTP Basic Authentication Authorization headers (RFC 7617) and Base64 tokens from username and password.

Generate cryptographically secure random tokens, secret keys, API keys, and passwords in hex, base64, base64url, alphanumeric, or numeric formats.

Generate and inspect time-ordered, sortable RFC 9562 Version 7 UUIDs with embedded millisecond timestamps and high-entropy random bits.

Parse, decode, and inspect X.509 certificates, PEM files, and CSRs client-side: extract subject, issuer, validity dates, SANs, key algorithm, and fingerprints without online trust claims.

Compute and verify cryptographic file hashes and checksums (SHA-256, SHA-512, SHA-384, SHA-1, MD5, CRC-32) from Data URIs, Base64, Hex, or text entirely client-side.