Duplicate File Finder
Find duplicate local files.
Runs locally in your browser
Your inputs are processed locally in your browser and are not uploaded or stored by us.
A free local utility for finding duplicate files based on size and cryptographic hash.
How to Use
- Select a batch of files locally using the file picker.
- Click the Process button to run the scanning algorithm within your browser.
- View the list of grouped files that share matching byte size and SHA-256 hash.
Privacy and Processing
All processing runs entirely in your browser. Files are grouped by byte size, and same-size candidates are hashed sequentially using WebCrypto SHA-256. Each candidate file is read fully into memory for its digest. Duplicates are declared based on matching size and cryptographic hash. Your selected files are processed locally and are not uploaded to our servers.