How to use this developer tool
Select a file and calculate a SHA checksum locally with browser crypto APIs.
How the processing works
- Reads the selected file in your browser.
- Hashes the file bytes with the selected SHA algorithm.
- Shows a copyable hexadecimal checksum.
Example
Compare a downloaded file's SHA-256 checksum with the value published by its distributor.
Using the output
Use the output as a practical starting point, then review it before using it in an important workflow.
Assumptions and limitations
- The file is not uploaded to Tool2Do.
- General checksums are not password hashing and should not be used as password storage.
Frequently asked questions
Does this require an account?
No. The core tool works without creating a Tool2Do account.
Is my input included in share links or analytics?
No. Tool2Do share actions use the tool page URL and safe metadata, not private values or uploaded files.