Compress the images inside a PDF and Optimize PDF both reduce file size, but they target different use cases. Compressing the embedded images focuses on maximum size reduction for sharing, while Optimize PDF is tuned for web delivery with proper font handling and metadata cleanup.
| Feature | Compress Images Inside PDF | Optimize PDF |
|---|---|---|
| Primary goal | Maximum file size reduction | Web-ready optimized PDF |
| Compression levels | Per-page image quality settings | Automatic optimization |
| Font handling | Recompresses images only | Font subsetting included |
| Metadata | Preserved | Cleaned and minimized |
| Best for | Email and uploads | Web publishing |
| Output quality | Depends on chosen image quality | Optimized for screen viewing |
Choose image compression when you need to quickly shrink an image-heavy PDF for email attachments, file upload limits, or to save storage space. Pick the per-page trade-off between size and quality.
Use Optimize PDF when you're publishing a PDF on a website or need it to load quickly in a browser. It handles fonts, metadata, and structure for the best web experience.
You can, but it's usually unnecessary. Optimize PDF already includes image recompression. If you need further size reduction after optimizing, then compress the images inside the PDF.
Compressing the images with high-quality settings typically produces smaller files. Optimize PDF prioritizes web compatibility and rendering quality over maximum compression.