Privacy tool
File Checksum Calculator
Choose a file to calculate its SHA-256 checksum without uploading it.
Runs in your browser. No upload.
Choose a file to begin.
About this tool
File Checksum Calculator made simple.
The checksum is calculated locally with the Web Crypto API. It can help compare a file with a trusted published hash, but does not prove who created the file.
Common questions
About File Checksum Calculator.
How do I create a SHA-256 checksum for a file?
Choose a file up to 25 MB. The checksum is calculated in your browser and shown as hexadecimal text.
How can I verify a downloaded file?
Compare its checksum with a value published by a source you trust. Matching hashes show the file contents match, but do not prove who published it.