Text Hash Generator
Compute the hash of any text with a selectable algorithm — MD5, SHA-1, the SHA-2 family, SHA-3, BLAKE2 and BLAKE3 — in hex or base64. Runs entirely in your browser, no server, no sign-up.
About this tool
This text hash generator computes a cryptographic hash of any text right in your browser, with the algorithm of your choice. The hashing runs locally in WebAssembly — your input is never uploaded to a server, which makes it safe for passwords, keys, and other sensitive strings.
A hash is a fixed-length fingerprint of its input. The same text always produces the same digest, but the digest cannot be reversed back into the original — so hashes are ideal for verifying that data has not changed, fingerprinting content, and deriving identifiers.
Supported algorithms
- MD5 and SHA-1 — fast and widely supported, but broken for security use; treat them as checksums only, not for passwords or signatures.
- SHA-2 family — SHA-224, SHA-256, SHA-384, SHA-512. SHA-256 (the default) is the standard modern choice: it secures TLS certificates, Git object IDs, and download checksums.
- SHA-3 family — SHA3-256 and SHA3-512, the Keccak-based NIST standard with a different internal design from SHA-2.
- BLAKE2 (BLAKE2b-512, BLAKE2s-256) and BLAKE3 — modern hashes that are typically faster than SHA-2 while remaining cryptographically strong.
Options
- Algorithm — choose which hash to compute.
- Interpret input as — hash the text as plain UTF-8 (default), or decode it from hex or base64 first so you can hash existing raw bytes such as a key or ciphertext.
- Output format — return the digest as hex (default) or as base64.
- Uppercase hex — emit the hex digest in uppercase.
Notes
- A hash is a one-way function: a digest cannot be reversed back into the original text.
- To hash an entire file (and get MD5, SHA-1, SHA-256, SHA-512, and CRC-32 at once), use the file-hash tool instead.
FAQ
Why doesn't my digest match what sha256sum prints?
Almost always a trailing newline. echo "abc" | sha256sum hashes abc\n
(four bytes), while this tool hashes exactly the characters you typed —
abc — with no newline appended. Use printf '%s' "abc" | sha256sum to
compare like-for-like.
Can I hash raw bytes instead of text?
Yes. Set Interpret input as to hex or base64 and the tool decodes
your input to bytes before hashing — handy for hashing a key, a ciphertext,
or another digest. The default text mode hashes the input as UTF-8.
Does the algorithm name have to be written exactly?
No — names are normalized, so SHA-256, sha_256 and sha256 are all the
same algorithm, and blake2b is accepted as shorthand for BLAKE2b-512.
Leaving the algorithm blank falls back to the default, SHA-256.
Can I get the original text back from a hash?
No. All of these are one-way functions — the digest can verify or fingerprint data but cannot be reversed. If you need something reversible, you want encryption (e.g. the aes-cipher tool), not a hash.
Developer & Automation Access
Run it from the terminal
Same engine as this page, headless — via the gizza CLI:
gizza tool hash-text "Hello, world!"New to the CLI? Get gizza →
Open it by URL
Pre-fill and auto-run this tool with query parameters — the names match the API/CLI:
https://gizza.ai/tools/hash-text/?text=Hello%2C%20world%21&algorithm=sha256&input_encoding=text&output_format=hex&uppercase=trueMachine-readable descriptor: tool.json — title + parameters JSON Schema for agents.