Add one folder or several. Duplicates are looked for across all of them.
Duplicate Finder
Find byte-for-byte duplicate files across folders. Files are grouped by size first and then hashed, so only possible matches are read. See each group and the wasted space, and export CSV. This tool never deletes anything.
Drop a folder here
Add as many as you like · any file type · sub-folders included
Good to know
- Exact means exact. A re-saved or re-scanned copy of a document is not a duplicate here.
- Files with a unique size are never read, which is what keeps a big folder quick.
- The tool only reports. What to remove is your decision.
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.
- Hashing reads each candidate whole into memory, so the largest single file binds: comfortable to about 1 GB.
- Thousands of files are fine. The time depends on how many share a size and how big they are.
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.