How to Use Apago PDF Shrink to Reduce File Size Without Losing Quality
1. Install and open Apago PDF Shrink
- Download and install the version compatible with your OS.
- Launch the app and open the PDF you want to compress.
2. Choose the right compression preset
- High Quality / Print: minimal compression, preserves images and text for printing.
- Medium / Web: balanced compression for on-screen viewing.
- Small / Email: aggressive compression to minimize file size.
Choose the highest-quality preset that still achieves the file size you need.
3. Adjust image downsampling and compression
- Downsample images to a resolution appropriate for intended use:
- Print: 300 dpi
- Screen/Web: 150–200 dpi
- Email/mobile: 72–96 dpi
- Choose image compression: use JPEG2000 or JPEG with high quality (80–90%) for photos; use ZIP/Flate for line art and images with large flat color areas.
4. Optimize fonts and subsets
- Embed only used font subsets rather than full fonts. This reduces size while keeping text rendering accurate. Ensure font subsetting is enabled.
5. Remove unnecessary objects and metadata
- Strip embedded thumbnails, unused form fields, hidden layers, file attachments, and document metadata (author, comments) if not needed.
6. Flatten transparency and annotations (if acceptable)
- Flattening reduces complexity and can lower file size. Only do this if you don’t need editable layers, annotations, or form fields after compression.
7. Linearize (optimize for web)
- Enable PDF linearization (fast web view) if the document will be viewed online; this can slightly change structure and sometimes reduce size.
8. Preview and compare quality
- Before saving, preview pages at 100% to check image quality and text sharpness. Compare key pages against the original.
9. Iteratively tweak settings
- If quality loss is unacceptable, increase image resolution or quality and re-run compression. Aim for the smallest file size that meets your quality threshold.
10. Save with a new filename
- Save compressed PDF under a new name to preserve the original.
If you want, I can suggest exact settings for a typical 20‑page scanned PDF intended for on‑screen reading.
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