Duplicate File Finder

Compare file sizes and SHA-256 hashes to find byte-identical files.

Tool options · presets, sharing & more

Presets & sharing: options only, never files, text or passwords. Undo/redo: editable form values, not file selection or generated results.

How to Use Duplicate File Finder

Choose the file or files for the operation; Base64 decode uses pasted input.

Set the options and arrange multiple files using the arrows if needed.

Run the operation and inspect its output or report.

Copy the text or download the resulting file(s).

What This Tool Does

Compare file sizes and SHA-256 hashes to find byte-identical files. Only byte-identical content is grouped. Similar-looking photos or reformatted documents are not treated as duplicates.

Common Use Cases

Preparing local file exports and checking file contents before sharing.

Managing project assets and test fixtures on your own device.

Privacy & Processing

This tool processes files and input in this browser tab. Its processing code does not upload them to a server. Loading this page and fetching uncached app files uses an internet connection. Optional usage analytics requires your consent and excludes input, filenames, passwords and generated content. Form undo history and result transfers stay in session memory. Explicitly saved presets contain approved settings only.

Offline use is not verified for this tool. Keep an internet connection available to load its page, code and any additional dependencies.

Frequently Asked Questions

What should I check before using the result?

Only byte-identical content is grouped. Similar-looking photos or reformatted documents are not treated as duplicates.

Are my files or inputs uploaded?

No. This tool processes selected files and entered data locally in your browser. Only the page and its supporting code are downloaded.

Does this tool work offline?

Offline use is not verified for this tool. Keep an internet connection available to load its page, code and any additional dependencies.