Hash generator and file checksum calculator
Check that a download is intact or that two files are identical. Drop files of any size, and each is read in small pieces by a worker, so even multi gigabyte files do not fill your memory. Paste a published checksum or a SHA256SUMS file and see at once whether it matches.
Tooloat runs in your browser and needs JavaScript. It opens in a moment, and your files are processed on your device.
How it works
- Drop files, or switch to Text.
- Choose the algorithms.
- Copy the hashes, or paste a checksum to verify.
Why use it
- MD5, SHA-1, SHA-256, SHA-384, SHA-512, BLAKE3 and CRC-32.
- Streams large files in the background.
- Verifies against pasted hashes and checksum files.
- HMAC for text.
Popular ways to use this tool
Questions and answers
How do I verify a downloaded file?
Drop the file, paste the checksum from the download page into the verify box, and you will see whether it matches.
Which algorithm should I use?
SHA-256 is the usual choice for published checksums. MD5 and SHA-1 only detect accidental damage.
Is my file uploaded?
No, hashing runs on your device.
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