File hash (MD5, SHA-1, SHA-256)
Calculate the MD5, SHA-1, SHA-256 and SHA-512 checksum of any file and check whether it matches the hash given on the download site.
How to useVerify a file hash
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File hash (MD5, SHA-1, SHA-256): what it is for
Choose or drag a file to calculate the MD5, SHA-1, SHA-256 and SHA-512 hashes at once. Paste the hash published by the site and the tool tells you instantly whether the file is identical to the original.
The file isn't uploaded to any server: the calculation happens on your device.
How to use
- Choose or drag the file.
- Paste the expected hash, if you have one.
- See whether it matches and copy the hash you need.
When to use it
- Checking an operating system ISO.
- Verifying a download wasn't corrupted.
- Comparing whether two files are identical.
Frequently asked questions
What is a file hash for?
To confirm that the downloaded file is exactly the original, with no corruption or changes. If the calculated hash equals the one published by the site, the file is identical.
Is the file uploaded anywhere?
No. The calculation happens in your browser, and the file never leaves your device. That's why it works even with large and confidential files.
Which algorithm should I use?
Use the one the download site gives. Today the most common is SHA-256. MD5 and SHA-1 still work for catching download errors, but aren't secure against deliberate tampering.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.