Hashing & crypto
MD5, SHA family, HMAC, CRC and bcrypt digests, each following its published specification. 26 tools, including Hash generator, UUID generator, Adler32 Checksum Calculator and Atbash cipher. All free, with no account and nothing to install.
Hash generatorCompute 15 hashes (MD5, SHA-256, SHA-3, CRC-32…) of a text or a file.UUID generatorGenerate UUID v7, v4, v5, v3, v1 or v6 in bulk, in several output formats.Adler32 Checksum CalculatorGenerate a Adler-32 hash of any text instantly in your browser, with hex or Base64 output. Used in zlib and PNG.Atbash cipherEncode or decode text with the Atbash substitution cipher (A↔Z, B↔Y…). Paste the text or drop the file; nothing leaves the page either way.Caesar cipher (ROT13)Encode or decode text with a Caesar shift cipher — ROT13 by default.CRC32 Checksum CalculatorGenerate a CRC32 hash of any text instantly in your browser, with hex or Base64 output. Fast integrity check (zip, PNG).CRC64 Checksum CalculatorGenerate a CRC64 hash of any text instantly in your browser, with hex or Base64 output. ECMA-182, 64-bit integrity check.Crypto address validatorPaste a Bitcoin or Ethereum address and get a real verdict: the actual checksum is verified — Base58Check for legacy addresses, Bech32/Bech32m for SegWit and Taproot, EIP-55 for Ethereum — so a single mistyped character is caught, not just a wrong length. It reports the address type and network, and runs entirely in your browser.CSS Box Shadow GeneratorDial in a CSS box-shadow with live preview and copy the generated code — offset, blur, spread, color, inset.FNV-1a Hash GeneratorGenerate a FNV-1a hash of any text instantly in your browser, with hex or Base64 output. Fast non-cryptographic 64-bit hash.JWT GeneratorBuild and HMAC-sign a JSON Web Token in your browser — HS256, HS384 or HS512.MD5 Hash GeneratorGenerate a MD5 hash of any text instantly in your browser, with hex or Base64 output. 128-bit digest — fast, but not for security.MurmurHash3 GeneratorGenerate a MurmurHash3 hash of any text instantly in your browser, with hex or Base64 output. Fast 32-bit hash for hash tables.Password entropy calculatorMeasure a password's real strength, or the entropy of a randomly generated one.Screen Resolution GuideGet the total pixels, megapixels and aspect ratio of a resolution.RIPEMD-160 Hash GeneratorGenerate a RIPEMD-160 hash of any text instantly in your browser, with hex or Base64 output. 160-bit, used in Bitcoin addresses.ROT47 cipherEncode or decode text with ROT47, which rotates all printable ASCII characters. Works on a pasted block or on a file you drop in.SHA1 Hash GeneratorGenerate a SHA-1 hash of any text instantly in your browser, with hex or Base64 output. 160-bit — deprecated for security uses.SHA224 Hash GeneratorGenerate a SHA-224 hash of any text instantly in your browser, with hex or Base64 output. SHA-2 family, 224-bit output.SHA256 Hash GeneratorGenerate a SHA-256 hash of any text instantly in your browser, with hex or Base64 output. The most widely used secure hash.SHA3-256 Hash GeneratorGenerate a SHA3-256 hash of any text instantly in your browser, with hex or Base64 output. Keccak sponge, FIPS 202.SHA3-384 Hash GeneratorGenerate a SHA3-384 hash of any text instantly in your browser, with hex or Base64 output. Keccak sponge, 384-bit.SHA3-512 Hash GeneratorGenerate a SHA3-512 hash of any text instantly in your browser, with hex or Base64 output. Keccak sponge, 512-bit.SHA384 Hash GeneratorGenerate a SHA-384 hash of any text instantly in your browser, with hex or Base64 output. SHA-2 family, 384-bit output.SHA512 Hash GeneratorGenerate a SHA-512 hash of any text instantly in your browser, with hex or Base64 output. SHA-2 family, 512-bit output.Vigenère cipherEncode or decode text with the Vigenère keyword cipher. Drop a file in rather than pasting it — it is read in your browser and never uploaded.