Duplicate Finder
Group a set of files by SHA-256 to find byte-identical duplicates.
How to Use
- Drop files or a folder.
- Duplicates get grouped; non-dupes are hidden by default.
Notes
About the Duplicate Finder
Whether you are at a desk or on your phone, the Duplicate Finder makes image, audio and file tasks easy — and it is completely free. Group a set of files by SHA-256 to find byte-identical duplicates.
How it works
Type in what you have, and the answer shows up right away. Change anything and it updates by itself. Everything runs in your browser, so it is fast and nothing you type is sent away.
Want the deeper story? The Knowledge Base explains the ideas behind the tools in more detail.
Frequently Asked Questions
Similar images?
This is bit-identical only. For perceptual matching use Image Compare.
How do I use the Duplicate Finder?
Just type your numbers. The answer shows up right away — there is no button to press. Change anything and it updates by itself.
Is it free? Does it work without internet?
Yes to both. It is free with no sign-up, and once the page has loaded it keeps working even with no internet.
Where does my data go?
Nowhere — every calculation runs on your own device. Nothing you enter is uploaded, logged, or stored.
Common Use Cases
Photo library
Dedup exact copies.
Downloads cleanup
Find duplicated installers.
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