Hash and checksum tool
Work out SHA-256, SHA-1, SHA-384 and SHA-512 for text or a file, and check a download against its checksum.
Runs in this browser. Nothing you give it is uploaded.
Loading the tool...
02About this tool
How to use it.
- Choose Text or File.
- The SHA-256, SHA-1, SHA-384 and SHA-512 hashes appear.
- To check a download, paste the hash from the download page and see whether it matches.
Questions
What is a hash for?
It is a short fingerprint of a file. If even one byte differs, the fingerprint is completely different, so you can tell whether a download arrived whole and unchanged.
Can it hash a very big file?
Yes. Files over 256 MB are read in small pieces so the page does not run out of memory. For those, only SHA-256 is worked out.
Where is MD5?
Left out on purpose. MD5 is broken for security checks, and SHA-256 is what download pages publish now.
Need this built into your business?
These tools are small examples of how we work: software that does one job well, where your data already is. If a job like this happens in your company every day, tell us about it.