🔒 Hash & Crypto
Hashes, symmetric and asymmetric encryption, password tools 36 free online tools, no sign-up.
- MD5 HashCompute the MD5 hash of text
- SHA HashSHA-1, SHA-256 and SHA-512 hashes
- HMAC GeneratorHMAC-MD5, HMAC-SHA1 and HMAC-SHA256
- AES EncryptionAES symmetric encryption and decryption
- DES EncryptionDES symmetric encryption and decryption
- SM3 HashChinese national standard SM3 hash digest
- SM4 EncryptionChinese national standard SM4 symmetric cipher
- RSA EncryptionRSA public-key encryption and private-key decryption
- Caesar CipherClassic letter-shift encryption with adjustable offset
- JWT DecoderDecode JWT header, payload and signature
- Password GeneratorGenerate strong random passwords with custom rules
- Password Strength CheckerRate password strength with improvement tips
- JWT GeneratorSign custom JWTs with an HS256 secret
- File ChecksumCompute SHA-256 and SHA-1 checksums of files
- MD2 HashLegacy MD2 hash (RFC 1319) for old-system comparison
- MD4 HashLegacy MD4 hash (RFC 1320), predecessor of MD5
- Keccak/SHA-3 HashKeccak-256 (Ethereum) and SHA-3 hashes
- SM2 Sign & VerifyChinese national standard SM2 signing and verification
- RIPEMD-160 HashRIPEMD-160 digest, the old Bitcoin address algorithm
- RC4 EncryptionRC4 stream cipher for legacy systems
- Playfair CipherDigraph classical cipher with a 5x5 key matrix
- Affine CipherAffine encryption y = ax + b (mod 26)
- Atbash CipherFold the alphabet A-to-Z, digits 0-to-9
- Polybius SquareMap letters to 5x5 row-column coordinates
- Tap CodePrison-wall tap code with dot-dash grid
- Keyword CipherBuild a substitution alphabet from a keyword
- Seven-Segment DisplayRender digits and letters as calculator segments
- A1Z26 CipherConvert letters to numbers A=1 through Z=26
- Baudot Code (ITA2)5-bit teleprinter code with letters/figures shifts
- Beaufort CipherVigenere variant with self-reciprocal C = K - P
- Crockford Base32Human-friendly Base32 without I, L, O and U
- UUID VersionsGenerate UUID v1/v4/v5/v6/v7 in one place
- BLAKE2 HashBLAKE2b and BLAKE2s variable-length digests
- XXHashExtremely fast non-cryptographic XXH32/XXH64
- CRC-16 & AdlerModbus, CCITT, XMODEM, ARC and Adler-32 checksums
- Double SHA-256SHA256(SHA256(x)), the Bitcoin-style double hash
Browse all 1211 free online tools