Encoders tools
Base64, URL, HTML entities, hash, HMAC, JWT, data: URI
Base64 encode / decode
Standard and URL-safe Base64 in both directions.
Hash & checksum
MD5, SHA1, SHA224, SHA256, SHA384, SHA512, CRC32, BLAKE2 — for any text.
HMAC generator
HMAC-SHA1/256/512 of any text with any key.
HTML entities ↔ text
Encode special characters to entities, or decode them back.
Image → data: URI
Fetch an image from URL and base64-encode it as a data: URI for inlining.
JWT decoder
Decode header, payload, signature. Show alg, typ, claims, expiry status.
URL encode / decode
percent-encode + parse a URL into scheme, host, path, query.