Compute SHA-256 hashes of text and files instantly — the modern standard for checksums and digital fingerprints. 100% in your browser, nothing uploaded.
Your data is completely safe. The cryptographic hashing is executed leveraging your web browser's memory natively. No data is sent over the network.
SHA-256 is part of the SHA-2 family designed by the NSA and standardized by NIST. It maps any input to a fixed 256-bit digest — 64 hexadecimal characters — and is the workhorse of modern computing: TLS certificates, code signing, Git object storage, blockchain, and software release checksums all rely on it.
Unlike MD5 and SHA-1, SHA-256 has no known practical collision attacks, which is why it's the default recommendation for file integrity and digital fingerprints today. This generator computes SHA-256 entirely in your browser — your text and files never leave your device, and hashing works even offline.
Hashing a file to verify a release? Load the file, copy the 64-character digest, and compare it against the vendor's published SHA-256 checksum. One different character means the file is not the same.
No backend API calls are required. Algorithms operate entirely over your local device.
Because data isn't uploaded dynamically, generation happens with zero network latency.
Supports MD5, the entire SHA-2 and SHA-3 family, alongside bcrypt.
Calculate the exact checksum of PDFs, images, code files, and more by uploading.
A: Always 256 bits — 64 hexadecimal characters — no matter how large the input is.
A: Yes. There are no practical collision or preimage attacks against SHA-256. It remains the standard choice for integrity checks and digital signatures.
A: No — it's too fast, which makes brute-forcing cheap. Use a deliberately slow algorithm like bcrypt (available in the selector above) or Argon2 for passwords.
A: No. It's a one-way function; the only 'reversal' is guessing inputs and comparing digests, which is computationally infeasible for strong inputs.
A: SHA-512 produces a longer 512-bit digest and is faster on 64-bit CPUs, but SHA-256 is more widely used and more than strong enough. Match whatever your counterpart system expects — both are available here.
No registration, no tracking of your content, no server uploads. Don't just take our word for it:
Your files and text are processed entirely on your device. Nothing is ever sent to us.
Once loaded, this tool keeps working with your Wi-Fi turned off. Try it.
Open your browser's DevTools → Network tab. You'll see zero requests carrying your data.
Discover other powerful utilities designed to supercharge your workflow and boost productivity.
Generate MD5 checksums from text or files instantly. 100% client-side — verify downloads and deduplicate files without uploading anything.
Secure, client-side hash generator supporting MD5, SHA-256, bcrypt, and more. Hash texts or files instantly offline.
Instantly generate accurate APA, MLA, Chicago, and Harvard citations. Export to Word or BibTeX.