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Online File Hash Checker for MD5, SHA-256 and SM3

Calculate MD5, SHA-1, SHA-256 and SM3 checksums on your device and compare them with the expected value.

or drop files here

Runs in your browser. Your files never leave your device.

About File Hash Checker

This file hash checker tells you if a file is exactly what it should be. Download pages for Linux ISOs, firmware and installers often list a SHA-256 or MD5 checksum. Paste it here and you'll see Match or No match at a glance, so you know the download wasn't corrupted or swapped along the way. It's just as handy for confirming that a backup copied to a USB drive or a NAS is identical to the original.

Everything runs in your browser. The file is read on your device and never uploaded, and files up to 2 GB work. You get MD5, SHA-1, SHA-256, SHA-512 and SM3, the Chinese national standard hash, each with a copy button.

How to use File Hash Checker

  1. 1
    Choose a file

    Click Choose files or drop a file on the page. The file hash checker starts reading it right away, on your device.

  2. 2
    Paste the expected value

    Copy the checksum from the download page into Compare with. Upper or lower case and stray spaces don't matter.

  3. 3
    Read the verdict

    You'll see Match when the values agree. No match means the file isn't the one that was published, so download it again.

  4. 4
    Copy or check more

    Copy any value with one click, or add more files; the ticked algorithms are used for each new one.

Why use Cubfile for this

  • Five hash algorithms

    MD5, SHA-1, SHA-256, SHA-512 and SM3 side by side. For later files, untick the ones you don't need to finish sooner.

  • Instant match check

    Paste the published checksum and the matching row lights up, with a clear Match or No match verdict.

  • Never uploaded

    Hashing happens in your browser, so private files stay on your device, and it doesn't count toward your daily tasks.

  • Compare two files

    Add a second file to see both sets of hashes. Identical files always give identical values.

FAQ

File Hash Checker: questions and answers

Does the file hash checker upload my file?
No. Your browser reads and hashes the file on your device, and nothing is sent to our servers. That makes it fine for contracts, backups or anything private. To lock such files with a password, Encrypt File also runs entirely on your device.
Should I use MD5 or SHA-256?
Use whichever the download page lists. For your own records, pick SHA-256 or SM3. MD5 and SHA-1 still catch accidental corruption, but they're no longer safe against deliberate tampering.
How do I verify a download with the file hash checker?
Choose the downloaded file, then paste the checksum from the download page into Compare with. Match means the file is intact; No match means it's damaged or different, so download it again. When the verified download is an archive, Unzip Online opens it without installing anything.
How large a file can I check?
Each file can be up to 2 GB. Hashing runs in your browser, so it's free and doesn't use any of your daily tasks; big files just take a little longer.
What is the SM3 hash in the file hash checker?
SM3 is the cryptographic hash from China's national standards (GB/T 32905), widely used in Chinese government and banking systems. Like SHA-256, it produces a 64-character hex value.
Share File Hash Checker with a friendIt runs in any browser, and they can try it without signing up.

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