Is my file uploaded to a server?

No, hashing runs entirely locally using the Web Crypto API — the file's bytes never leave your device.

Why isn't MD5 offered?

The Web Crypto API doesn't implement MD5; use SHA-256 or higher for integrity checks.

Is there a file size limit?

Very large files may be slow or memory-intensive since the whole file is read into memory before hashing.

File Hash Calculator

Compute SHA-1/256/384/512 digests of a local file.

Works Offline

Privacy First

No Login

No API

Web Crypto API

File

Nothing is uploaded — hashing happens locally

Drop a file here

or choose a file — it never leaves your device

Digests

SHA-1

SHA-256

SHA-384

SHA-512

About the File Hash Calculator

Drag and drop a file to compute its SHA-1, SHA-256, SHA-384, and SHA-512 digests simultaneously using the Web Crypto API, with a progress indicator. Files are hashed in memory and never uploaded.

Examples

Hash a downloaded file

installer.zip

Output

SHA-256: 9f86d0818...(64 hex chars)

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser