File Checksum Calculator

Calculate a SHA-256 or SHA-512 checksum for a local file and compare it with a value supplied by the file publisher.

Files and content are processed locally in your browser and are not uploaded to our server.

About this tool

Choose a file to calculate its SHA-256 or SHA-512 checksum. Large files show reading progress, and the resulting hexadecimal value can be copied and compared with a checksum supplied on a download page.

Features

SHA-256 and SHA-512
File-reading progress
Copy the hexadecimal checksum
Compare with an expected value
Files remain in the browser

How to use

Choose a file: Select the file whose checksum you want to calculate.
Choose an algorithm: Select SHA-256 or SHA-512.
Compare the result: Copy the result and compare it with the checksum supplied by the file publisher.

Examples

Check whether a downloaded file matches the publisher's checksum
Confirm that a file has not changed
Compare two copies of the same file
Record a checksum for later comparison

Limitations

The checksum covers the file contents, not its file name or other file-system information
Very large files may take longer to read
The entered text or selected file is processed directly in your browser and is not sent to a server.

FAQ

Why show progress for reading?: Large files take time to read from disk into memory before the checksum completes.
MD5 support?: This tool supports SHA-256 and SHA-512 hashing in the browser.
Will renamed files change the hash?: No. Checksums cover file bytes only, not filenames or metadata.