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Encode, decode, hash, inspect tokens, and work with certificate and key material locally.
17 tools
Encode or decode HTML entities instantly in your browser.
Encode text to Base64 format or decode it back to a readable string.
Encode text for safe URL transmission or decode it back to readable string.
Decode JSON Web Tokens instantly. Never sends your token to any server.
Encode, decode, and verify JWT tokens in one local-first workspace.
Instantly generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text.
Generate an MD5 hash quickly with a focused single-algorithm workflow.
Convert images to Base64 data URIs and back.
Decode PEM-encoded X.509 certificates and inspect all details locally.
Verify JWT signatures (HMAC) and validate claims — all client-side.
Parse Content Security Policy headers and analyze for security issues.
Analyze security headers with pass/warn/fail scoring and remediation guidance.
Generate time-based or counter-based one-time passwords for 2FA.
Gzip/Deflate compression lab with browser-dependent Brotli support for HTTP debugging, size checks, and Base64 transfer.
Decode SAML requests and responses locally, inspect assertions, attributes, audiences, recipients, and signature material without validating trust.
Parse DER, PEM, Base64, or hex encoded ASN.1 data locally and inspect TLV structure, tag names, lengths, OIDs, strings, and nested containers.
Inspect text, hex, and Base64 as bytes locally with UTF-8 text, grouped hex, Base64, binary rows, offsets, and byte statistics.