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File Hash Checker

Compute MD5, SHA-1, SHA-256, SHA-512 and CRC32 checksums for any file without uploading it.

Hash a file in your browser

File: —
MD5: —
SHA-1: —
SHA-256: —
SHA-512: —
CRC32: —
Checksum check: —
The file is read with FileReader and hashed on your device, so no byte of it is ever uploaded.

How to use the File Hash Checker

  1. Choose the file you want to hash from your device.
  2. Read the MD5, SHA-1, SHA-256, SHA-512 and CRC32 values shown.
  3. Paste a published checksum to see which algorithm it matches.

Features

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Frequently Asked Questions

Common questions about the free online file hash checker.

Choose a file, wait for the hashes to appear, then paste the checksum you expect. The tool names the algorithm that matched it.
MD5, SHA-1, SHA-256, SHA-512 and CRC32. The SHA family uses the browser Web Crypto API while MD5 and CRC32 are computed in JavaScript.
No. The file is read with the browser FileReader API and hashed locally, so its bytes never leave your device.
Almost any: a bare hex digest, a full line from a checksums file with its file name, or a value with a prefix such as sha256: or 0x.
They are still used for spotting accidental corruption and for downloads published with those digests, but they must not be used for passwords.
Any file your browser can hold in memory. Very large files may take a few seconds because every byte is processed inside the page.
Only if you trust the published checksum. Compare it with the value here; a match means the file is byte for byte identical to the original.
Yes. It is completely free, needs no account, and keeps the file on your device, so no file name or content is transmitted.

Last updated: October 10, 2026