Paolo T. (pixline)

swergroup

NEW: <a href="http://blog.sucuri.net/?p=7654" rel="nofollow ugc">EXIF header malware/backdoor</a> sanitization!
Filenames on the web are different than those on the desktop. Empty spaces and strange characters doesn’t belong to web space. Enter UploadPlus: you can set your rules and clean your files’ name while they upload. Three basic rules:
<ul>
<li>keep only alphanumeric [A-Za-z] and digits, spaces and strange characters stripped out;</li>
<li>convert spaces and strange characters into dashes (-)</li>
<li>convert spaces and strange characters in underscores (_)</li>
</ul>
You can apply website-based or date-based prefix, even a custom prefix. Lowercase or Uppercase? Your choice! 
Some default prefix:
<ul>
<li>time/date based timestamps via PHP date()</li>
<li>blog name/slug</li>
<li>random</li>
<li>and many more!</li>
</ul>
UploadPlus can also transliterate filenames (text conversion from a non-latin script to raw latin characters). 
You can preview settings in the media settings page without uploading files.
<h4>Support</h4>
We’ll do our best to support the plugin on <a href="https://wordpress.org/support/plugin/page2cat">support forum</a>. Paid support and custom coding options are available on the <a href="https://swergroup.zendesk.com" rel="nofollow ugc">SWERgroup HelpDesk</a>.
If you found this plugin useful or need a new feature feel free to <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=CX6VQ6FVJFN4L" rel="nofollow ugc">sponsor a coding/support session</a>!
<h4>Credits</h4>
GPL2© 2008+ Paolo Tresso/<a href="http://swergroup.com/sviluppo/siti-internet-torino/" rel="nofollow ugc">SWERgroup</a>.

UploadPlus : File Name Cleaner

Clean file names and enhance security while uploading.

Onni Hakala

Geniem Oy

WordPress plugin which removes all accented characters like <code>åöä</code> from future uploads and has easy wp-cli command for removing accents from current uploads and attachment links from database. 
This helps tremendously with current and future migrations of your site and helps you to avoid strange filename encoding bugs.
Sanitize accents from Cyrillic, German, French, Polish, Spanish, Hungarian, Czech, Greek, Swedish. 
This even removes rare but possible unicode NFD characters from files by using <a href="http://php.net/manual/en/normalizer.normalize.php" rel="nofollow ugc">PHP Normalizer class</a>. These usually happen if you have mounted uploads into your vagrant box in OS-X.
This plugin is wordpress multisite compatible.
More information in github page: https://github.com/devgeniem/wp-sanitize-accented-uploads

WP Sanitize Accented Uploads

Simple plugin which removes accented characters from uploaded files.

UploadPlus : File Name Cleaner vs WP Sanitize Accented Uploads