Photoshop: Quick Export As PNG scales down the file for no reason

  • 1
  • Problem
  • Updated 5 months ago
  • (Edited)
To reproduce:
  1. Create a 24000x6000-pixel document.
  2. Fill it with noise, or some other visibly pixel-sharp test pattern.
  3. Do 'Quick Export As PNG'.
  4. Open the resulting PNG file.
  5. It is 19920x4980 pixels in size, and has clearly undergone resampling.
Why does it do this? Why can't I save the entire document? Why doesn't it at least WARN me that I'm losing data? I've been using this to save scans, and have apparently been losing resolution this whole time??
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Andrew Fraticelli

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  • baffled

Posted 5 months ago

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Photo of Jeffrey Tranberry

Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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Sorry. Yes. There is a size limit of 10MP when using Export As. (Save for Web has a similar limitation) Both Export As and Save for Web are designed to be export functions that create a lossy rendition from your original file.

One option/workaround would be to use Save As to save a JPEG or PNG rendition of your image. Save As can accommodate the files sizes you need for your 24000x6000 image.
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Andrew Fraticelli

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If that's the limitation then so be it, but I really feel like there absolutely needs to be some warning that the scaling is taking place instead of just having it happen silently? It's not hard to tell it happened if you know to look for it, but I had no suspicion that it was changing anything so I assumed that thta was the resolution I had been scanning at...!
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photoshopguru_GER

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i agree, this happened to me just recently and if i wouldn't have been aware of the exact pixel dimensions of the document (because we were resaving it due to a size issue) i wouldn't have seen it.