Optimization7 min readUpdated 2026-01-28
10 Proven Techniques to Reduce PDF File Size
Learn 10 practical techniques to trim oversized PDF documents for instant emailing and faster web downloads.
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Step-by-Step Instructions
1
Downsample raster images to 150 DPI
High-DPI 600 DPI photos waste space; 150 DPI is ideal for screen reading.
2
Convert color scans to Grayscale
Dropping RGB channels to monochrome cuts image weight significantly.
3
Remove unneeded pages and attachments
Delete divider sheets and blank scan backsides.
4
Clean unreferenced metadata and streams
Use Pdfyara's Compress tool to purge ghost objects.
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Expert Tips
- Combine compression with Grayscale for maximum reduction.
Common Mistakes
- Re-compressing already pixelated low-res graphics.
Questions About This Guide
It likely contains uncompressed raw camera scans. Compressing it will shrink it by over 80%.
Try the Tools Mentioned in this Guide
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