Hash generator — MD5, SHA-256, SHA-3, BLAKE3 and 9 more at once

How to use the hash generator

1. Type or paste into Text. Every character counts, including spaces and line breaks.
2. Choose an Output format: Hex (lowercase), HEX (upper) or Base64.
3. Optionally paste a digest into Compare with a known hash. The tool tells you which algorithm produced it, or that none did.
4. Copy the digest you need from the table.

What it does and when to use it

Use it to check a published checksum, find which algorithm made a hash you found in a config or a database column, or produce test vectors for your own code. Seeing every algorithm at once is useful when you only know the length of a hash. A 32-character hex digest is often MD5, 40 is SHA-1 or RIPEMD-160, and 64 is SHA-256, SHA3-256, BLAKE2b-256 or BLAKE3.

The 13 algorithms are MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA3-256, SHA3-512, BLAKE2b-256, BLAKE3, RIPEMD-160, CRC32 and xxHash64. CRC32 and xxHash64 are checksums for spotting accidental changes, not cryptographic hashes.

For a keyed signature (webhooks, API requests), use the HMAC generator instead. To verify a file, use the file hash checker, and to compare two digests directly, the hash compare tool.

How it works

The text is encoded as UTF-8 bytes and passed to the hash-wasm library. That is WebAssembly code that loads the first time you use the tool and then runs in your browser. Your text is not uploaded. Base64 output re-encodes the same raw digest bytes, so a SHA-256 is 64 hex characters or 44 Base64 characters. After the table, a notice reminds you that MD5 and SHA-1 are broken for security use.

Worked examples

The input abc gives the published test values: MD5 as listed in RFC 1321, and SHA-1 and SHA-256 as in the NIST examples:

MD5 | 900150983cd24fb0d6963f7d28e17f72
SHA-1 | a9993e364706816aba3e25717850c26c9cd0d89d
SHA-256 | ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad
CRC32 | 352441c2

Pasting the SHA-256 in uppercase into the compare box returns Matches SHA-256.

The newline trap. hello world hashes to b94d27b9…cde9 with SHA-256, but hello world followed by a line break (what echo sends) gives:

SHA-256 | a948904f2f0f479b8f8197694b30184b0d2ed1c1cd2a1ec0fb85d299a192a447

Limits and tips

• Empty input still hashes. An empty box gives the well-known empty-string digests, such as SHA-256 e3b0c442…b855, so check the box is not blank by mistake.
• No salt or key. The same text always gives the same digest. Short or common inputs can be found in lookup tables.
• Text only. Binary data, hex strings and Base64 strings are hashed as the characters you typed, not decoded first.