Duplicate File Finder
Drop a set of files and find exact duplicates by comparing SHA-256 checksums — plus a CSV report of every file's hash. Done in your browser; nothing is uploaded.
Runs in your browser — your file never leaves your deviceDrag & drop files here
or click to browse — you can select several
Processed entirely in your browser. Your files are never uploaded.
Frequently asked questions
Is Duplicate File Finder free to use?
Yes — Duplicate File Finder is completely free with no limits, no watermarks and no sign-up. It runs in your browser, so there is nothing to pay for.
Are my files uploaded or stored anywhere?
No. This tool does all its work locally in your browser using your own device's power. Your files never leave your device and we never see them.
Do I need to install anything or create an account?
No installation and no account needed. Duplicate File Finder works on any modern browser — Windows, Mac, Linux, Android and iPhone.
How do I use Duplicate File Finder?
Open the tool, add your file (or paste your content), adjust any options, then press “Find duplicates”. Your result is ready to download in seconds.
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