FREE · DEVELOPER TOOLS
File Checksum Calculator.
Calculate SHA-256 or SHA-512 hashes of files locally.
How to use File Checksum Calculator
Choose a file and hash algorithm, then calculate and copy the digest.
How it works
A checksum changes when the file’s bytes change, making it useful for integrity comparison. A matching hash is only meaningful when the expected value comes from a trusted source. Hashing does not scan for malware or prove who created the file.
Example
Compare a downloaded file’s SHA-256 with the publisher’s checksum.
Questions about File Checksum Calculator
Is File Checksum Calculator free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
One file up to 25 MB. Requires a secure browser context such as HTTPS or localhost. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.