Computes four common hashes of your text at once: MD5 (32 hex chars), SHA-1 (40), SHA-256 (64) and SHA-512 (128). Input is hashed as UTF-8 bytes, so results match md5sum / sha256sum on Linux for the same text.
SHA family uses the browser's native WebCrypto; MD5 uses a built-in implementation verified against standard test vectors. Nothing is uploaded. Note: MD5 and SHA-1 are fine for checksums but no longer safe for password storage.