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.

Sean Butze

Many users do not compress or resize their images before uploading them into a post, and oftentimes WordPress’s maximum upload limit of 2MB-10MB is still too large to prevent the insertion of photos that can signficantly slow down a website.
WP Image Size Limit allows an administrator to set a custom file size limit that is specific to image files and smaller than WordPress’s general file size limit.
This is especially useful when you need to put tighter restriction on image uploads but want to preserve the ability to upload larger files of other formats (audio, video, etc.).

WP Image Size Limit

Just what I needed to tamp down those designers who think it's okay to use 20MB images!

Brilliant

Adds a new setting under Settings -> Media where an admin can set a maximum upload file size for image files.

UploadPlus : File Name Cleaner vs WP Image Size Limit