File tools

Zip and unzip, rename files in bulk, find out what a file really is and split large files, all in your browser without uploading anything.

  • Free
  • No sign-up
  • Runs in your browser

All tools in this category

Bulk rename filesRename many files at once with a prefix, numbering and find and replace. Upload limit checkerCheck which files pass a size limit before you try to upload them. Clean file namesRemove accents, spaces and symbols from file names before uploading them. Create a ZIP filePack any files into a single ZIP archive and download it. File type detectorFind what a file really is by its content, not its extension. Paste text, download a fileTurn any pasted text into a downloadable file, with the name and extension you choose. Total file size calculatorDrop several files and see their combined size instantly. Unzip onlineOpen a ZIP file and download only the files you choose, without any app. Compare two file listsPaste two lists of file names and see what's missing from each. File list to textDrop files and get their names as a plain text list you can copy or download. Split a large fileSplit any file into smaller parts of a chosen size, with instructions to rejoin them.

What you can do here

Working with files often means small chores: compress a folder into a ZIP, rename 200 photos with a pattern, find out what a file with no extension is, or cut a big file into pieces small enough to email. These tools handle them on your device, so the files never travel to a server.

Most operate on names and structure rather than content, which keeps them fast even with big folders, and they show a preview before you commit to a change, so a wrong pattern does not cost you your originals.

  • Archives: create a ZIP and open one online.
  • Names: rename in bulk, clean file names and compare two lists of files.
  • Identify and check: detect the real type of a file, sum the size of many files and check an upload limit.
  • Split and export: split a large file, list files as text and turn pasted text into a download.

Frequently asked questions

Are my files uploaded?
No. Files are processed in your browser and never leave your device.
Is there a size limit?
Your device's memory is the limit. Each tool states a practical size, and large files may be slow on old phones.
Can I rename files without changing their content?
Yes. The bulk renamer changes only names and gives you the renamed files in a ZIP, and your originals stay untouched.
How do I know what a file really is?
The file type detector reads the first bytes of the file and reports its real format, whatever its extension says.
Can I open a ZIP without installing anything?
Yes. Drop it in the unzip tool and download the files you need.