If your original file is 1920x1080 and has 72 ppi, and in InDesign you scale it down to 20%, InDesign will NOT reduce the quality, because it's supposed to work as nondestructive as possible. Your 72 ppi is not a fixed thing, it's always relative to the size of your image. You should share the settings you applied at the export PDF screen in your InDesign, that way we could help you better. Throughout my career, I don't think I've ever had to go as low as 72 to get my file size down.ħ2 is fine for screens, but you'd want 150 for anyone who prints your PDF file to their in-house color copier.
For instance, if I need to create a PDF file the client will send via email, I'll start with the print setting but try a few different dpi, 100, 150, to do a comparison of image quality. One thing that many people don't notice is that the color settings vary from one to the next so your colors will look different if you use the "smallest" setting (which will be a color profile for screens) than if you use the "press" setting (which will be a setting for offset presses).īut even after you choose the setting best suited to your needs, you can go in and further customize the dpi of your output. If you haven't already, you can experiment with all of them. I use the options under the File menu/Adobe PDF presets. I don't know how you are saving your PDF files, but some methods give you more options than others. What I do is customize my PDF settings in InDesign. I retain full image quality of the import. When I run into this problem, I do not change my image size in Photoshop. Any help at all would be much appreciated! I've been racking my brain over this for the last few hours and Googled relentlessly to no avail and it's honestly driving me insane.
I've tried Reduce File Size in Acrobat and messed around with a bunch of different export options in both Photoshop and InDesign like modifying JPG quality or exporting as Interactive PDF but I seem to be getting similar end results each time with the image quality getting obliterated. I'm assuming that's what's causing the pages to be so heavy, but I'm not sure how to solve this because I've tried resizing the images in Photoshop to the destination size and exporting at 1x or 2x scale but it just results in unreadable pixelated images. I'm exporting my images out of Photoshop as 72ppi JPGs, but when I place them in my InDesign frames the effective PPI goes through the roof since the image is scaling to ~20-30% original size. It's for web viewing so page dimension is 1920x1080px and I have 2-3 images per page. I'd like to get the file size down to around 5-10MB but am struggling to balance image quality with file size. I've designed a 12-page PDF portfolio on InDesign and it's currently around 28MB on export.
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