Title: Will it not break the source code?
Last modified: May 18, 2018

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# Will it not break the source code?

 *  Resolved [Melpomene](https://wordpress.org/support/users/melpomene/)
 * (@melpomene)
 * [8 years ago](https://wordpress.org/support/topic/will-it-not-break-the-source-code/)
 * More of a question before I attempt to use it rather than an observation based
   on use
 * I’ve probably got in the region of 2500 PNG images in a website. Clearly this
   is my fault for not using JPG’s in the first place. I have a few questions therefore
   regarding how I can rectify this
 * Does the plug-in convert the PNG’s to JPG’s in the website? or does it do it 
   from image library in WordPress? Not all the images I have in the website at 
   present are in the image library
 * Assuming it can do it to the website, will it not break the source code in the
   HTML and effectively convert them into snapped images. I’m aware that people 
   using Smush have complained about this and it would be a concern to me, as clearly
   losing 2500 images in one application would be pretty drastic
 * Obviously I’m desperate to avoid having to render every image one at a time, (
   it’ll take months) but equally I’m worried that I could break all the images 
   in a single action if it breaks the HTML
 * Thx
 * in anticipation (and no small about of hope!)

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Thread Starter [Melpomene](https://wordpress.org/support/users/melpomene/)
 * (@melpomene)
 * [8 years ago](https://wordpress.org/support/topic/will-it-not-break-the-source-code/#post-10295814)
 * OK, I’ve tried to experiment a bit, and now realise that no one is likely to 
   reply to the first question(s) because the answer should be self-evident (apologies
   for that).
 * The first one is answered it pulls through all PNG files that have ever been 
   posted to the domain (which came as a surprise to me). I thought these were long
   ago gone and didn’t realise they were still rattling around the system. I could
   do with a whole load of them exterminating rather than taking up memory. Is there
   any way of doing this?
 * The second question concerns the default setting of 90%. Why would anyone want
   to reproduce a JPG image that is 90% of the quality of the PNG? Should I not 
   set it at 100%? or is the 90% setting something to do with compressing the image,
   and the image quality itself doesn’t look any different?
 *  Plugin Author [kubiq](https://wordpress.org/support/users/kubiq/)
 * (@kubiq)
 * [7 years, 11 months ago](https://wordpress.org/support/topic/will-it-not-break-the-source-code/#post-10409711)
 * Hello,
 * sorry I don’t understand your question in second paragraph.
 * About JPG quality, there are many articles online… you can see one of them also
   with examples here: [http://regex.info/blog/lightroom-goodies/jpeg-quality](http://regex.info/blog/lightroom-goodies/jpeg-quality)
 * Simply said – lower quality means lower image size = faster web load, less data
   usage, but if quality is too low, then image can be ugly… most photos are almost
   unnoticeable on 55-60% quality and file size is a way lower… be careful with 
   images with some significant red element, they need at least 70%
 * Also when image has only few colors (max 32) then it’s good to keep it as PNG
   and just use some PNG optimizer – it will be lower on filesize and keeps its 
   quality on 100% … or use SVG

Viewing 2 replies - 1 through 2 (of 2 total)

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 * 2 replies
 * 2 participants
 * Last reply from: [kubiq](https://wordpress.org/support/users/kubiq/)
 * Last activity: [7 years, 11 months ago](https://wordpress.org/support/topic/will-it-not-break-the-source-code/#post-10409711)
 * Status: resolved