File Hash Calculator: MD5, SHA-1, SHA-256 & SHA-512 Checksums

Use this free file hash calculator to compute MD5, SHA-1, SHA-256 and SHA-512 checksums of any file right in your browser. Drop in a file, tick the hash algorithms you need, and copy a lowercase hex digest to verify a download, confirm file integrity, or compare against a published checksum. SHA-1, SHA-256 and SHA-512 are computed with the browser's native Web Crypto API, while MD5 uses a built-in implementation, so results are fast and accurate. Everything runs 100% in your browser: your file is read into memory locally and is never uploaded to any server. There is no sign-up, no watermark, and no limit on how many hashes you generate.

🔒 100% private — files never leave your device

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How to use

  1. Drop or select any file (documents, ISO images, ZIP archives, photos, videos — any type).
  2. Tick the hash algorithms you want: MD5, SHA-1, SHA-256 (selected by default) or SHA-512.
  3. Click Compute to generate each checksum locally in your browser.
  4. Copy each lowercase hex digest and compare it against the publisher's value.

Frequently asked questions

What file types can I hash?

Any file. The hash is computed from the raw bytes, so documents, ISO and disk images, ZIP archives, EXE and DMG installers, photos, videos, audio and any other type all work the same way, regardless of size or format.

Is my file uploaded anywhere?

No. Hashing runs 100% in your browser — your file is read into memory on your device and processed locally, so nothing is ever sent to a server or stored anywhere.

Which hash algorithms are supported?

Four: MD5, SHA-1, SHA-256 and SHA-512. SHA-256 is ticked by default. You can select any combination and get every requested digest in one click.

What is a checksum used for?

A checksum verifies that a download was not corrupted or tampered with. Compute the hash of your copy and compare it to the value the publisher lists; if they match, the file is intact and authentic.

Will the same file always give the same hash?

Yes. A given algorithm always produces the same digest for the same file, and even a one-byte change produces a completely different hash — which is exactly what makes checksums reliable for integrity checks.

Is there a file size limit?

There is no fixed limit — the file is read into memory in your browser, so very large files depend on your device's available RAM. Most everyday files hash in a second or two.

About this tool

Free file hash calculator to compute MD5, SHA-1, SHA-256 and SHA-512 checksums and verify downloads. Runs 100% in your browser with no uploads, giving copyable lowercase hex.

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