Choose a folder. Each file is read in this tab and nothing is uploaded.
File Hash Manifest
Compute the SHA-256 of every file in a folder and export a CSV manifest. Later, verify a folder against that manifest and see which files matched, changed, went missing or are extra.
What to do
Drop a folder here
Sub-folders included · any file type
Good to know
- A matching hash means the bytes are identical. Dates and names are not part of it.
- A file that cannot be read is reported, and the run continues.
- Verify mode reads a manifest made by this tool, so keep it somewhere safe.
Your files stay on your machine
This tool runs entirely inside your browser tab. Nothing is uploaded, stored, or sent to a server — close the tab and every trace is gone.
These are the free ones — see the full suiteHow big a file can it take?
There is no upload, so there is no upload limit — but the work happens in this tab, which means your browser’s memory is the budget. Nothing here will refuse a file for being large; a big enough one simply gets slow and, eventually, reloads the tab. The figures below are rules of thumb on a desktop browser, not enforced caps. On a phone or tablet, expect a good deal less.
- The browser's hash function reads each file whole into memory, so the largest single file binds: comfortable to about 1 GB, and larger files may fail on their own without stopping the batch.
- Files are hashed one at a time, so the folder can hold thousands. Total size sets the time.
Password-protected PDFs are declined whatever their size — unlock the file first. If a run does die on a long document, splitting it into volumes and working through them one at a time is the reliable way round it.