Batch File Renamer

Rename every file in a folder from your browser. Add text before or after existing names, or replace filenames completely with an automatically numbered sequence.

Drop a folder here

or choose one manually

Rename mode

Prefix text + original filename Suffix original filename + text Replace new name + automatic numbering

Text to add

Prefix is added before the current filename.

Rename order

Include files inside subfolders Rename files recursively inside nested folders too. Folder names are not changed.

File extensions are preserved. Suffix text is inserted before the extension. By default, only files directly inside the selected folder are renamed.

Preview

Choose or drop a folder to begin.

How to use

I originally put this together to save some time during WordPress development work, mostly when I had batches of images and other files that needed cleaner names before uploading them.

Pick the folder you want to work with, then choose how you want the filenames changed. You can add text to the beginning or end of each name, or replace the names completely with a numbered sequence.

The preview updates before anything is changed, so give it a quick look before clicking Rename Files. If you also want to rename files tucked away inside subfolders, check Include files inside subfolders. The folders themselves will stay as they are.

Examples

Prefix: photo.jpg → vacation_photo.jpg Suffix: photo.jpg → photo_final.jpg Replace: photo.jpg → vacation_0.jpg image.png → vacation_1.png scan.pdf → vacation_2.pdf

Notes

The files stay on your computer. This page does not upload them anywhere.

The tool preserves each file's extension.

Potential filename collisions are checked before the Rename button is enabled.

Characters that Windows does not allow in filenames are blocked.

Use desktop Chrome or Edge for the best support.