Free Bulk File Renamer

Give lots of files tidy, consistent names in one go: number them, add a prefix or date, find and replace words, fix capitals and remove spaces. See every new name before you commit.

Quick human check, then the tool unlocks:

Drop any files or whole folders here Photos, documents, music, anything. Use ↑ ↓ to set the numbering order.

New name pattern Numbers start at Number digits Number again in each folder Find Replace with Find uses a regular expression Ignore capitals when finding Capitals Spaces Remove accents and symbols (web-safe names) Extension

Pattern codes: {name} original name, {n} number, {folder} folder name, {date} file date (2026-10-31), {time} file time (14-05-09), {size} size in KB. Example: {folder}-{date}-{n}. The extension is kept automatically.

How to rename files in bulk

Drop in your files, or press Choose a folder, and put them in order.
Type a pattern and choose any clean-ups. The table shows every old and new name as you type.
Download a ZIP of the renamed files, or a rename script that renames the originals on your computer.

🔒 Your files never leave your computer. Renaming happens in your browser.

ZIP or rename script?

ZIP gives you renamed copies, and the originals stay untouched. Simple, but slow for huge folders of video.
Rename script renames the files where they are, instantly, whatever their size. Save it in the folder you chose, then double-click rename.bat on Windows, or run sh rename.sh on Mac/Linux. It never overwrites an existing file, and an undo script is included.