File Hash Checker
Compute file digests for integrity checks.
⛨File Hash Checker
All processing happens locallyWhat this tool does
File Hash Checker is a local file checksum tool, the file is read and hashed in the browser without uploading, so large files stay private.
Compare the result character by character with the published checksum. A single differing character means the file was altered or the download was incomplete.
How to use it
- Paste or type your content into the input field at the top, or press the sample button to load demo data.
- Adjust the options below the input, such as output format, separators, letter case or precision.
- Press the main button to run the conversion. Results appear instantly in the output panel without a page reload.
- When the result looks right, use the copy button in the corner, or download it as a local file.
Tips and notes
Clean up stray spaces and line breaks before pasting for more accurate results.
FAQ
Hundreds of megabytes work; the file is read in chunks to limit memory, though very large files take noticeably longer.
SHA-256 is the general choice; MD5 survives in legacy systems but suits integrity comparison only, not security.
No. Reading and hashing happen locally and the file never leaves your device.
Yes. The tool is completely free with no usage limits, and you never need an account or a sign-in.
No. All processing runs locally in your browser, so the input never reaches a server and is never logged or stored.
Yes. The layout is mobile-first, so inputs and buttons stay comfortable on phones and tablets in both orientations.
Yes. A copy button in the output panel puts the result on your clipboard, and you can also download it as a text file.