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Find files with identical content in a folder — whatever their names — and see how much space the extra copies take, with a CSV report.
Also covers: Duplicate file checker · Find duplicate files
Drop files or folders here
Choose a folder (sub-folders included) or drop files. Files are compared by content, not by name. Files are processed on your device and never uploaded.
Or drop files. Sub-folders are included.
Files with the same content are grouped, with the space the extra copies use. Files never leave your device.
Content. Two files with different names but identical bytes are duplicates; two files with the same name but different content aren't.
It groups files by size, then hashes only the same-size ones with BLAKE3. Identical hashes mean identical content.
No — it only reports them, so nothing is deleted by mistake. Download the CSV report and tidy up yourself.
ZIP
Zip files and whole folders in your browser, keeping the folder structure, with a choice of compression level — nothing is uploaded.
Extract
Open ZIP, 7z, RAR, TAR, .tar.gz and .gz files in your browser, including password-protected ones, and save the files one by one, as a ZIP, or straight into a folder.
TAR
Bundle files and folders into a .tar or .tar.gz archive, with long and non-English file names kept intact.
gzip
Compress files to .gz at the level you choose, or decompress .gz files back to the original, with the size saving shown.
Rename
Rename many files at once with a pattern, numbering, find & replace (with regex), case changes and new extensions — preview everything, then download renamed copies.
Clean
Make file names safe for Windows, Mac, Linux and URLs: remove forbidden characters, replace accents and spaces, and fix reserved names like CON.