What this tool does
Choose a file and hash algorithm to calculate its hash without uploading it. Large files may need more time and memory, so allow the calculation to finish.
- Choose SHA-256, SHA-512, or MD5.
- Status is displayed during calculations and prevents repeated starts of the same task.
- MD5 is only suitable for compatibility check, and SHA-256 or SHA-512 is preferred for security integrity check.
How to use it
- Click "Choose File" and select a local file.
- Confirm the displayed file name, size and type.
- Select the algorithm and click "Calculate Hash".
- Once the calculation finishes, copy the digest and compare it with the expected value.
Common uses
- Verify the downloaded file against the SHA digest provided by the publisher.
- Confirm whether the byte contents of the two local files are consistent.
- Record deterministic checksums for build artifacts.
Privacy and security
Choose a file and hash algorithm to calculate its hash without uploading it. Large files may need more time and memory, so allow the calculation to finish.
File Hash Calculator Features
Select a local file and calculate SHA-256, SHA-512 or MD5 within the browser, no upload required. Review the result, then copy it for use.
FAQ
Will the file be uploaded to the server?
No. Files are only read and evaluated by the current browser tab.
Why do large files require more memory?
The browser reads the entire file for the calculation, so larger files usually need more memory. If it fails, close other resource-intensive tabs and try again.
Which algorithm should be chosen?
SHA-256 is preferred for general integrity checks; SHA-512 provides a longer digest, and MD5 is only used for compatibility with older systems.
Will the results be the same every time for the same file?
Yes. As long as the file bytes and algorithm are the same, the digest is deterministic.