File Checksum Calculator
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How to use File Checksum (SHA-256)
- Choose your file (or drop it onto the page).
- Adjust the options shown.
- Select the action button and wait for it to finish.
- Review the result, then download it.
What to expect
A new file is created. Your original file is never modified.
- Files up to 400 MB; the whole file must fit in memory.
Frequently asked questions
Why isn't MD5 offered?
Browsers' Web Crypto doesn't include MD5, and MD5 isn't safe for verifying downloads. Use SHA-256.
Is my file uploaded anywhere?
No. The file is read and processed by JavaScript in your browser. Only the website's own code and assets are downloaded.
Do I need to create an account?
No. Every tool works without sign-up or login.
Is it safe for confidential documents?
Files are processed locally in your browser and never uploaded. Close the tab or select Clear to release them from memory.