File checksum
Check a download hasn’t been tampered with by comparing its checksum to the one the publisher lists. Files are hashed on your device.
Runs in your browser. Your files are never uploaded or stored.
- File
Something not working, or missing an option?
How to use File checksum
- Paste the checksum the publisher lists (optional).
- Choose or drop the file.
- See the checksum and whether it matches.
Questions
What is a checksum for?
It’s a fingerprint of a file. If yours matches the one the publisher lists, the file wasn’t corrupted or tampered with.
Are my files uploaded?
No. The tool runs inside your browser, and the page is blocked from sending data anywhere. You can check by turning off your internet connection: it keeps working.
Open-source parts
This tool uses only features built into your browser: no third-party code.
More tools: Everyday
Guides: How to check a download is genuine with its checksum