Compress PDF Without Losing Quality: How-To Guide
How to reduce PDF file size without visible quality loss: compression settings, image optimization, and font subsetting.
How PDF Compression Works
- Image resampling: Downscale images to screen resolution (150 DPI for screen, 300 for print)
- JPEG compression: Re-encode images at 80-85% quality (barely visible difference)
- Font subsetting: Include only used characters, not entire font files
- Remove metadata: Strip embedded thumbnails, XMP data, and duplicate objects
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