Security Tools
File Checksum Calculator
Upload any file to calculate its MD5, SHA-1, and SHA-256 checksums, and optionally compare against an expected value to verify integrity — processed entirely on your device.
Add a file to checksum
Click to browse, or drag and drop
How to use this tool
- 1Add any file.
- 2MD5, SHA-1, and SHA-256 checksums are calculated automatically.
- 3Optionally paste an expected checksum to verify a match.
Frequently asked questions
Why would I check a file's checksum?+
To verify a downloaded file wasn't corrupted or tampered with in transit — the publisher usually lists the expected checksum alongside the download.
Is my file uploaded anywhere?+
No — the checksum is calculated entirely in your browser using the Web Crypto API (and a client-side MD5 implementation), and the file is never transmitted anywhere.