Duplicate File Finder
Compare files by content hash and group the ones that are byte-for-byte identical.
Files & batch Client-side Hash grouping
Tool preview
How to use it
- 01
Drop the files to compare.
- 02
Wait for hashing.
- 03
Review the identical groups.
Limitations
- ! It compares content, not names; renamed copies are still found.
- ! Very large sets are limited by memory and time.
FAQ
Can it find near-duplicates?
No, only exact matches; similar photos with different compression are not grouped.
Does it delete anything?
No, it only reports; you decide what to remove.
Are files uploaded?
No, hashing is local.
Files never leave your device
Processing happens in your browser using the File API, WebAssembly and Web Workers. There is no upload endpoint.
Technical details
- Processing
- Client-side
- Implementation
- Hash grouping
- Category
- Files & batch
- Network requests
- None while processing