· encryption
Transform text with the ROT13, ROT5, ROT18 or ROT47 substitution ciphers.
Encryption
A hash turns any input into a short, fixed-length fingerprint. The same input always gives the same digest, and changing a single byte gives a different one. That makes hashes the standard way to check a download, compare two files or store a password without keeping the password itself.
This category covers the SHA-2 and SHA-3 families, BLAKE2 and BLAKE3, Keccak and SHAKE, and the legacy MD4, MD5 and SHA-1 for older systems that still expect them. For error detection there are CRC-32, CRC-64, Adler-32 and FNV checksums. Keyed and password hashing come with matching verifiers: HMAC, and Argon2id. ROT13 and ROT47 sit here too, as simple letter rotation ciphers.
For accounts and logins there is a random password generator and a JWT decoder for reading the header and claims of a token.
23 public tools
Transform text with the ROT13, ROT5, ROT18 or ROT47 substitution ciphers.
Generate an HMAC authentication code for text or a file using a hexadecimal secret key.
Generate SHA-1 digests from text or uploaded files: 160 bits, 40 hexadecimal characters. SHA-1 is not suitable for new security-sensitive uses.
Generate MD4 digests from text or files up to 2 GiB each for legacy compatibility. MD4 is cryptographically broken.
Generate MD5 digests from text or uploaded files: 128 bits, 32 hexadecimal characters. MD5 is cryptographically broken and is for legacy use only.
Generate SHA-512/224, SHA-512/256 or full SHA-512 digests from text or files up to 2 GiB each.
Generate SHA-384 digests from text or files up to 2 GiB each: 384 bits, 48 bytes, 96 hexadecimal characters.
Hash text or files up to 2 GiB with SHA-256 and copy the 64-character hex digest, or paste a published checksum to verify a download.
Generate SHA-224 digests from text or files up to 2 GiB each: 224 bits, 28 bytes, 56 hexadecimal characters.
Generate SHAKE128 or SHAKE256 extendable-output hashes of 1 to 1,048,576 bytes from text or files up to 2 GiB each.
Generate Keccak-224, Keccak-256, Keccak-384 or Keccak-512 hashes from text or files up to 2 GiB each.
Generate SHA3-224, SHA3-256, SHA3-384 or SHA3-512 digests from text or files up to 2 GiB each.
Generate BLAKE2b digests at 128, 256, 384 or 512 bits, or any length from 1 to 64 bytes, from text or files up to 2 GiB each.
Generate BLAKE2s digests at 128, 160 or 256 bits, or any length from 1 to 32 bytes, from text or files up to 2 GiB each.
Generate BLAKE3 hashes from text or uploaded files, 256-bit by default and any length up to 1,048,576 bytes, with optional keyed hashing.
Create a salted Argon2id password hash using memory-hard, interoperable defaults.
Generate FNV-1a or FNV-1 32-bit and 64-bit non-cryptographic hashes from text or files up to 2 GiB each, with the offset basis and prime for each width.
Generate CRC-32 checksums from text or files up to 2 GiB each using ISO-HDLC, CRC-32C, BZIP2, MPEG-2, cksum and six more named variants.
Generate CRC-64 checksums from text or files up to 2 GiB each using the XZ, ECMA-182, Go-ISO, MS, NVMe, Redis or WE variant.
Generate Adler-32 checksums from text or files up to 2 GiB each. Adler-32 is built for speed rather than security.
Decode a JWT to read its header, claims and signature. Nothing is verified, so use it to inspect a token, not to trust one.
Verify an HMAC authentication code against a message or file, using a hexadecimal secret key and SHA-2 or SHA-3.
Verify a password against an Argon2 PHC hash using the parameters embedded in the hash.