SHA-256 Hash Generator
Generate the SHA-256 hash of any text instantly, using your browser's built-in Web Crypto API. It is checked against the standard test vector: the SHA-256 of “abc” must come out as the well-known 64-character hash — this tool produces exactly that.
SHA-256 hash
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256-bit hash, shown as 64 hexadecimal characters. SHA-256 is the modern standard for checksums and integrity checks. Test vector: SHA-256 of “abc” is ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad.
How to use
- Type or paste the text you want to hash.
- Click Generate SHA-256 to see its 64-character hexadecimal hash.
- Copy the hash to compare it with a published checksum.
Frequently asked questions
What is a SHA-256 hash?
SHA-256 turns any input into a fixed 256-bit fingerprint, shown as 64 hexadecimal characters. The same input always gives the same hash, and changing even one character changes the hash completely.
Is SHA-256 secure?
Yes. SHA-256 is a standard cryptographic hash used worldwide for file checksums, certificate signatures and blockchain systems. Unlike MD5, no practical collisions are known.
Why would I compare SHA-256 hashes?
To check that a file or piece of text is unchanged. If you hash a download and the result matches the hash published by the author, the file arrived intact and unmodified.
Does my text leave my device?
No. The hash is computed in your browser with the Web Crypto API. Nothing is uploaded to any server. Use it as a sha256 hash generator free — no signup, nothing to install.
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