Plugin / Clean Filenames

Samuel Aguilera




It takes the following steps for getting cleaner and safe to use filenames

  • Removes or replace special/international characters that can make your filenames not compliant with servers that don’t have support for international locales and filenames, or third-party services. (e.g. ‘España.png’ will become ‘Espana.png’, ‘prüfen’ will become ‘prufen’).
  • Replaces any ‘+’ in the filename with ‘-‘ (e.g. ‘A+nice+picture.png’ will become ‘A-nice-picture.png’).
  • Replaces any ‘.’ character before the one used for file extension with ‘-‘(e.g. ‘A.nice.picture.png’ will become ‘A-nice-picture.png’).
  • After running all character replacement filters, a filter is applied to ensure that the filename only contains letters, numbers, underscores, dashes, and dots. Any other character will be removed from the filename.
  • And finally all letters in the filename are set to lowercase to prevent issues with case insensitive systems.

This reduces problems with some servers, services, plugins… That may have problems handling filenames with special or international characters.

The plugin does its job during file upload process, so it’ll change only filenames for files being uploaded after plugin activation.

It supports a large number of international characters, including but not only, characters from belarusian, cyrillic alphabet, czech, german, hebrew, hungarian, russian, polish, spanish, ukrainian, and some other special characters (e.g. №, @, $, etc.).

If you have any questions or need support, please check FAQ for additional information before asking.


  • WordPress 3.0 or higher


7 reviews

Rating breakdown

Details Information



First Released

26 Apr, 2009

Total Downloads


Wordpress Version

4.9 or higher

Tested up to:


Require PHP Version:

5.6 or higher





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