SHA-256 Hash Generator

Hash text or files to SHA-256 instantly — runs entirely in your browser

Or hash a file (max 100 MB)

What Is SHA-256 and What Is It Used For?

SHA-256 (Secure Hash Algorithm, 256-bit) turns any input — a word, a paragraph or an entire file — into a fixed 64-character hexadecimal fingerprint. The same input always produces the same hash, but even a one-letter change produces a completely different result, and the process cannot be reversed to reveal the original text.

Developers use SHA-256 to verify file downloads against published checksums, store password digests, sign API requests, generate cache keys and validate data integrity. It's the hashing backbone of TLS certificates, Git object storage, blockchain systems and most modern security standards — unlike the older MD5 and SHA-1, no practical collisions are known for SHA-256.

Private by design

This generator uses your browser's built-in Web Crypto API, so the hashing happens entirely on your device — the text or file you hash is never uploaded, logged or stored. That makes it safe to hash sensitive strings, API keys or private documents. Both lowercase and uppercase hex outputs are provided, since different systems expect different casing.

Frequently Asked Questions

Verifying file integrity against checksums, password digest storage, API request signing, digital signatures, Git and blockchain systems. It produces a unique 64-character fingerprint of any input.
No. SHA-256 is a one-way function — you cannot recover the original text from the hash. That's exactly why it's used for security purposes.
No. Hashing runs in your browser using the built-in Web Crypto API. Nothing you enter is uploaded, logged or stored anywhere.
SHA-256. MD5 is broken — collisions can be manufactured — and should only be used for non-security checksums on legacy systems. SHA-256 remains cryptographically secure.

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