IngramSpark's vague "LOW RESOLUTION IMAGES IN FILE" error is caused by individual embedded images below 150 DPI — even if your document is 300 DPI. BookReady finds exactly which images, where, and how to fix them.
The error you're seeing
LOW RESOLUTION IMAGES IN FILE: We recommend color and black and white images be 300 ppi. For line art, we recommend 600 ppi bitmap images. Note: Your files contain one or more items below 150 ppi.
This warning means an individual image embedded in your PDF — usually your cover art, a background texture, or a decorative element — is below 150 DPI at the size it's placed. BookReady checks every single embedded image and tells you exactly which one is the problem.
Step 1 — Book specs (for spine width validation)
Step 2 — Upload your cover PDF
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Full wrap cover PDF — front, spine, and back. Up to 50MB.
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Checking your cover...
Scanning every embedded image for resolution issues
Your cover is ready to upload
Processed and verified for IngramSpark
⚠️ Image resolution cannot be auto-fixed — low-res images need to be replaced in your design tool before uploading. See fix instructions above.