SHA-256 hash generator
Type or paste text, or drop a file, and get its SHA-256 hash instantly. Everything happens in your browser: nothing is uploaded. Paste a published hash to check it matches.
SHA-256 hash
Base64:
SHA-256 turns any input into a 64-character fingerprint. The same input always gives the same fingerprint, a one-character change gives a completely different one, and the process cannot be reversed. Lotteries and "provably fair" games publish hashes so results can be checked afterwards.
What a SHA-256 hash is
SHA-256 is a hash function: it turns any input into a fixed 64-character fingerprint. The same input always gives the same fingerprint, and changing a single character changes the whole thing. You cannot work backwards from the hash to the input. It is used in Bitcoin, in software downloads, in digital signatures and in provably fair games.
What people use it for
- Verifying a download: compare the file's hash with the one published by the author.
- Provably fair games and lotteries: a hash published in advance commits to data revealed later.
- Checking that two files are identical.
- Learning how hashes behave: change one letter and watch the result.
Privacy
The tool uses your browser's built-in cryptography. Your text and files are not sent to any server and are not stored.
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For bloggers and site owners
Embed this tool on your site.
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<iframe src="https://cryptodrawz.com/embed/sha256-hash-generator" title="SHA-256 hash generator" width="100%" height="1000" style="border:0;max-width:960px" loading="lazy"></iframe>
<p style="font-size:14px">Free tool by <a href="https://cryptodrawz.com/tools/sha256-hash-generator">CryptoDrawz</a></p>Frequently asked questions
Is SHA-256 encryption?
No. It is a one-way hash, not encryption. You cannot decrypt a hash.
Can I decrypt a SHA-256 hash?
Not directly. Short or common inputs can be found by guessing, which is why passwords should use slow, salted hashes.
Is it safe to hash a file here?
Yes. The file is read by your browser and never uploaded.
How is SHA-256 used in lotteries?
To fingerprint the ticket list before a draw, so that nobody can change a ticket afterwards without the fingerprint changing. See how to verify a draw.