Everyday utilities
Duplicate File Finder Online
Identify byte-for-byte duplicates among files you choose.
Data is processed on your device · No data is uploaded to our servers
Instructions
- Choose two or more files.
- Scan the selected files.
- Review matching groups or download the report.
Understanding your result
A duplicate group contains files with identical bytes even if their names differ. Two resized copies of the same photo have different bytes and will not belong to the same group. Review the groups and file paths available to you before deciding what to remove elsewhere.
What to do if you have a problem
If expected duplicates do not appear, compare file sizes and whether one was edited or re-encoded. If selection exceeds the limit, choose a smaller batch. This tool supplies a report and never deletes files; use that report to guide a separate, deliberate cleanup.
What to know before using the result
Maximum 200 files and 100 MB total. Names and timestamps are ignored; visually similar files are not detected. No files are deleted. Requires Web Crypto on HTTPS or localhost.
Files and text are held in this page while you work. Downloads are saved through your browser. Reloading or closing the tab clears the working page; a downloaded copy remains in your device's download location.
Summary
Use the duplicate groups to review identical file copies before making changes in your folders.