Bulk File Renamer – Free Batch File Renamer (Online + Windows App)

Use this free bulk file renamer from PlainBench to rename multiple files at once with automatic numbering and clear patterns. Great for TV shows, movies, photos, and documents that need neat, consistent filenames.

Prefer the easiest option? Download the Windows desktop file renamer

Get the free, standalone PlainBench Windows file renamer. It runs locally on your PC, works offline, and gives you a friendly interface with preview and in-app undo – no scripts, no command line.

Download the Windows Desktop File Renamer

Standalone app – no login, no “free trial”, no subscriptions. Just a PlainBench tool that works.

Online bulk file renamer (3 easy steps)

Select your files, choose a filename pattern with automatic numbering, preview the changes, and download a Windows .bat script to rename your files locally.

1. Select the files you want to rename

Choose individual files or an entire folder. The tool only reads filenames in your browser and does not upload file contents.

Folder selection works in most modern browsers. All processing stays on your machine.

No files selected yet.

2. Set your rename pattern and automatic numbering

Type any static text you want and the tool will automatically add a progressive number. You can also use tokens to keep parts of the original name.

The pattern is your static part (e.g. My Show S01E or Vacation-2025). The tool will automatically add numbers to each file.

Start #
Step
Zero-pad

Example: 2 = 01–02–03, 3 = 001–002–003

Optional tokens: [NAME] = original filename (no extension), [N] = exact placement for the number. If you skip [N], the number is simply appended to the end (e.g. Test1, Test2, Test3).

3. Preview your new file names and export the script

Check that everything looks right, then download a Windows .bat script or copy the commands to run manually.

How to use the script: download plainbench_rename.bat, move it into the folder that contains your files, open it in a text editor to adjust the cd path if needed, then double-click to run.

Want an even easier method?

Skip scripts and use the PlainBench Windows desktop file renamer .

Free • Easy to Use • Trusted • Secure • No Login Required – just download, open, and rename whole folders with a click.

How to use this bulk file renamer

This PlainBench bulk file renamer is designed to make large file collections easier to manage. Instead of renaming files one by one, you choose a simple pattern and let the tool create clean, consistent filenames with automatic numbering.

  • Select a folder or group of files from your computer.
  • Optionally filter by extension so you only rename video files, images, or documents.
  • Enter a base pattern like My Show S01E or Vacation-2025.
  • Set the starting number, step, and zero-padding for your sequence.
  • Preview the new names in the table, then export a Windows .bat script or copy the commands.

Because everything runs in your browser and the script is executed locally on your PC, your files stay private. This makes it ideal for personal media libraries, client work, and internal archives where you don’t want to upload anything.