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Check whether two files are exactly the same, byte for byte, and see where they differ in a side-by-side hex view — any file type, any size.
Also covers: Binary file compare · Compare two files · Hex diff
Drop file A
Drop file B
Any type and size.
See whether they're identical, how many bytes differ, and view the differences in hex. Files never leave your device.
A matching SHA-256 tells you files are identical; this also shows where and how they differ. You can show SHA-256 too.
Yes — both are read in 4 MB chunks in a background worker, so they're never loaded whole.
Use the Diff Checker, which shows added and removed lines.
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.