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In Adobe Illustrator CC 2014 I have designed an illustration with the instructed dimension of 300 × 400 pixels, but I have also been instructed to use 96 PPI instead of 72 PPI for web publishing of this illustration. NOTE:- The company who will publish this illustration on web asked me to send the PNG in 96ppi instead of 72ppi.

I don't see how to set a custom PPI while creating a new document. However, I can change the PPI from document setup after opening the document.

But, saving the PNG at 96 PPI increases the dimension from 300 × 400 pixels to 533 × 400 pixels and saving for web downgrades the PPI from 96 to 72.

I have to submit the final PNG illustration at 96 PPI and dimension 300 × 400 pixels. How can I do this?

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Basically whoever instructed you to do this doesn't know what they are talking about. PPI has no affect on how anything is shown on a screen, only pixels matter.

If you absolutely have to submit a PNG at 96 PPI, simply...

  1. Export from Illustrator at 100% 72 PPI.
  2. Open the image in Photoshop.
  3. Open the Image Size dialog (Image → Image Size...).
  4. Uncheck "Resample Image".
  5. Change "Resolution" to 96 Pixels/Inch.
  6. OK then Save.
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  • I was thinking that there should be more obvious ways to talk about pixel pitch than using PPI and DPI without causing this sort of mental havoc on people. But then im not a grapghic designer i dont need to design better methods for graphics – joojaa Aug 31 '16 at 7:06
  • @joojaa it's a futile exercise. It's always going to confuse people no matter what you say or do. – Cai Aug 31 '16 at 7:14
  • Yes but atleast one could be clearer than a rather obscure PPI name. I mean if we measured width in say inches and called it optional print width then you woluldn't have all these people trying to set optional print width for stuff that is never printed. And it would be clear form getgo that its optional and not i mean something that should be enforced. – joojaa Aug 31 '16 at 7:19
  • @joojaa you should start calling it that! We'd probably lose half our questions if it caught on though :p – Cai Aug 31 '16 at 7:28
  • @joojaa Thanks for the answer. I have a doubt though. The software I use has options to change the PPI settings (see screenshot here prntscr.com/cce7gi) If PPI has no affect on anything on a screen then why so many predefined options to choose from? – Vivek Shahi Aug 31 '16 at 7:30
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There is no PPI in illustrator! PPI only makes sense for images not a page description language. What size is a pixel in a image that can be shown in a arbitrary size? Size of a pixel is thus arbitrary.

From this follows, that there is no pixel unit in illustrator! This is where the confusion stars as Ilustrator simply defines a pixel 1/72 th of an inch. The alternative solution would just make 100% zoom different in different documents which is more confusing. To really understand this you would need to unlearn 10-50% of your math education.

So you export your image at 72 ppi and change the metadata to say 96ppi. after export. Or dont design with pixel dimensions but physical ones.

PS: Just a general observation whenever there is a question here that mentions the words PPI/DPI and pixel in the same sentence you know somebody got it horribly wrong. PPI never really comes to play, unless you print and having a 300 by 400 pixel image for print makes no sense (except in very very special circumstances where you would not use illustrator).

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