Make Filename Lowercase
Sets uploaded media filename to lowercase.
The facts
- Rating
- 4.8★ from 4
- Active installs
- 1k+
- Price
- Free
- Last updated
- 3 Sep 2025
- Added
- Feb 2011
- Requires WP
- 3.0.1
- Tested up to
- WP 6.8.8
- Downloads
- 10,018
Our analysis
AI-assistedMake Filename Lowercase is a WordPress plugin that automatically converts uploaded media filenames to lowercase. It works by applying a filter on the filename during the upload process, ensuring that any uppercase characters are transformed to lowercase. This is particularly useful for maintaining consistency in file naming conventions across your media library.
The plugin is suitable for users who frequently upload media files and want to avoid issues related to uppercase characters in filenames. It is compatible with WordPress versions 3.0.1 and above, making it a straightforward solution for those looking to manage their media files effectively.
Best for: This plugin suits WordPress users who upload media files and prefer lowercase filenames.
What it does well
- ✓Automatically converts filenames to lowercase
- ✓Applies during the upload process
- ✓Compatible with WordPress 3.0.1 and above
- ✓Free to use from the WordPress.org directory
- ✓Has a good rating of 4.8 out of 5
Where it falls short
- •Limited feature information available
Verdict
Make Filename Lowercase provides a simple solution for managing media file names in WordPress. It is a useful tool for ensuring consistency in file naming.
From the developer
ereckers's own description of Make Filename Lowercase, lightly tidied.
Sets uploaded media filename to lowercase as filter on sanitize_file_name. Based on post at Stack Overflow asking if there is a way to “Rename files during upload within WordPress 3.0 backend”.
Created for WordPress 3.0.1+ which saves any uploaded media filename (Image, Video, Audio) as lowercase. This effectively changes the name of the file at upload if a user were to upload a file with any uppercase characters.
For instance:
- MOVIE-FILE.MOV > movie-file.mov
- Movie-File.wmv > movie-file.wmv
- ImAgEfILe.gif > imagefile.gif
- imageFile.JPG > imagefile.jpg
- ETC > etc
Note: WordPress sets file extension to lowercase. This plugin does a strtolower on the filename.
More Information
Visit the Red Bridge Internet site for more information about Make Filename Lowercase plugin.