File Checksum Calculator
Check a download's SHA-256 or MD5 checksum against the published one. Any file size, hashed in your browser, never uploaded.
Runs in your browser. Nothing you enter is uploaded
About File Checksum Calculator
Software downloads, disk images and backups often come with a checksum, a long code such as a SHA-256 hash. If your copy produces the same code, it arrived complete and unchanged.
Pick the file and paste the published checksum: you'll see straight away whether it matches. The file is read in your browser in small pieces, so even multi-gigabyte ISO files work, and nothing is uploaded.
Get the MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text or file at once. Hashes are used to check that files weren't changed, to compare data, and in many developer tasks.
Files of any size are hashed in your browser in small pieces, so even large disk images work and nothing is uploaded. Paste an expected checksum to see whether it matches.
How to use File Checksum Calculator
- 1Choose Text or File.
- 2Type or paste text, or pick a file.
- 3Copy a hash, or paste a published checksum to compare.
Frequently asked questions
Are my files uploaded?
No. Hashing runs in your browser, so your text and files never leave your device, even large ones.
Which hash should I use?
Use SHA-256 unless something specific asks for another. MD5 and SHA-1 are fine for spotting accidental changes, but they're broken for security, because attackers can create different files with the same hash.
Why doesn't my checksum match?
Either the file is different (an incomplete download, a different version or a tampered copy), or the checksum is for another algorithm. The comparison tells you which algorithm's length it matches.
Can I hash a password here?
You can, but don't store passwords as plain MD5 or SHA hashes: they're too fast to guess. Use a password hashing algorithm such as Argon2 or bcrypt instead.