Files & archives
Badly named piles, copies, junk and mystery formats. Sorted without uploading a thing.
10 tools · free · no upload
- Hundreds of files to renameBatch rename files
- What is missing from my backup?Compare folders
- Same files saved twiceFind duplicate files
- What is inside this ZIP?ZIP viewer
- Is this file what its name says?File type checker
- Is this file broken or cut off?Check file corruption
- What is eating my disk space?Folder size analyzer
- Are these two files the same?Compare binary files
- File too big to copy or emailSplit file
- ZIP full of junk and copiesClean ZIP file
How the file tools work
Every tool reads your files with the browser’s own file access, in this tab. Big files are read in slices, so a multi-gigabyte backup does not have to fit in memory at once, and ZIP archives are read from their table of contents before anything is unpacked. Nothing is uploaded; folders you drop are only read, never changed.
Which tool for which problem
- Files have useless names like IMG_4821: rename them in bulk with a live preview.
- A folder is full of copies: find the duplicates and see how much space they waste.
- The disk is full and you don't know why: see what takes the space.
- A backup might be incomplete: compare the two folders and list what is missing or changed.
- Someone sent a ZIP: look inside it before you extract anything, or clean it of Mac and Windows junk.
- A file won't open or has the wrong extension: check its real type, then check it for damage.
- Two files should be identical: compare them byte by byte.
- A file is too big to email or copy to a USB stick: split it into parts and join them again later.
Questions
Are my files uploaded or changed?
Neither. Files are read in this browser tab and the originals stay exactly as they are. When a tool makes something new, such as a renamed copy or a cleaned ZIP, it is offered as a download.
Why can’t the tools rename or delete files directly?
Websites are not allowed to change files on your disk. The renamer and the duplicate finder give you renamed copies or a short script to run yourself, so nothing happens without you.
Can I drop a whole folder?
Yes, in Chrome, Edge, Firefox and Safari on a computer. On phones, pick several files instead, because most mobile browsers cannot open a folder.
Is it safe to open a ZIP I don’t trust here?
Opening it here only reads its list of contents, and unpacking is capped so a “zip bomb” cannot fill your memory. Nothing in the archive is run. Still, don’t open a program from an archive you don’t trust.