How are duplicate files detected?
Files can be grouped by size and then compared using content checksums. Matching checksums indicate identical file contents.
File
Duplicate File Finder
Find duplicate files by comparing file size and content checksums directly in your browser without uploading them.
Tool
Duplicate File Finder
Find duplicate files by comparing file size and content checksums directly in your browser without uploading them.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Use this free Duplicate File Finder to identify files with identical contents. The tool can first group files by size and then compare checksums to confirm exact duplicates, even when the filenames are different. All selected files are analyzed directly in your browser, so they do not need to be uploaded to a server.
Examples
- photo-copy.jpg and photo.jpg
- report-final.pdf and report-final-2.pdf
- Duplicate files in a download folder
Frequently Asked Questions
Can files with different names still be duplicates?
Yes. Duplicate detection is based on file contents rather than filenames.
Are my files uploaded?
No. Duplicate detection is designed to run locally in your browser.