Upperdog

Emil Gustafsson

<p>This plugin automatically converts language accent characters in filenames when uploading to the media library. Characters are converted into browser and server friendly, non-accent characters.</p>
<h3>Features</h3>
<ul>
<li>Converts accent characters to non-accent, latin equivalents in Swedish, Danish, German, and more.</li>
<li>Removes special characters like exclamation marks, periods, hashtags, and more.</li>
<li>Lets you choose if you want to convert only image files, or all file types.</li>
<li>Makes site and server migrations easier thanks to non-accent character filenames.</li>
<li>Provides filter hook for developers who want to specify which file types to convert.</li>
</ul>
<h3>Examples</h3>
<ul>
<li>Räksmörgås.jpg <span aria-hidden="true" class="wp-exclude-emoji">→</span> raksmorgas.jpg</li>
<li>Æblegrød_FTW!.gif <span aria-hidden="true" class="wp-exclude-emoji">→</span> aeblegrod-ftw.gif</li>
<li>Château de Ferrières.png <span aria-hidden="true" class="wp-exclude-emoji">→</span> chateau-de-ferrieres.png</li>
</ul>
<h3>Worth noting</h3>
<p>The plugin only converts filenames when the files are being uploaded. It can not convert existing files.</p>
<h3>Filter for developers</h3>
<p>This filter provides developers a way to specify which file types the plugin should convert. This filter overrides the plugin settings on the media settings page. For a complete list of mime types, see <a href="http://en.wikipedia.org/wiki/Internet_media_type" rel="nofollow ugc">Wikipedia</a>.</p>
<p>The following example will convert PDF, JPEG and PNG files only:</p>
<pre><code>function my_clean_image_filenames_mime_types() {
    $mime_types = array(
        'application/pdf',
        'image/jpeg',
        'image/png',
    );
    return $mime_types;
}
add_filter( 'clean_image_filenames_mime_types', 'my_clean_image_filenames_mime_types' );
</code></pre>


Clean Image Filenames

Using it happily on many websites without any issue.

Does what it says


Works like indicated. Simple and efficient


Works as expected

This plugin automatically converts language accent characters to non-accent characters in filenames when uploading to the media library.

Samuel Aguilera

<h4>Features</h4>
<h4>It takes the following steps for getting cleaner and safe to use filenames</h4>
<ul>
<li>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’).</li>
<li>Replaces any ‘+’ in the filename with ‘-‘ (e.g. ‘A+nice+picture.png’ will become ‘A-nice-picture.png’).</li>
<li>Replaces any ‘.’ character before the one used for file extension with ‘-‘(e.g. ‘A.nice.picture.png’ will become ‘A-nice-picture.png’).</li>
<li>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.</li>
<li>And finally all letters in the filename are set to lowercase to prevent issues with case insensitive systems. </li>
</ul>
<p>This reduces problems with some servers, services, plugins… That may have problems handling filenames with special or international characters.</p>
<p>The plugin does its job during file upload process, so it’ll change only filenames for files being <em>uploaded after plugin activation</em>.</p>
<p>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.).</p>
<p>If you have any questions or need support, please check FAQ for additional information before asking.</p>
<h4>Requirements</h4>
<ul>
<li>WordPress 3.0 or higher</li>
</ul>


Clean Filenames

Fix issues with some weird plugins and their stupid developers. Work as described except spaces in filename. The plugin just don't handle it correctly.

I like it!

Removes or replace international or special characters that can make your filenames not compliant with some servers or services.

Clean Image Filenames vs Clean Filenames