Optimize PDF
Clean up a PDF's structure without losing quality. Free, private and processed in your browser — files are never uploaded.
How to use Optimize PDF in 4 steps
- Upload the PDF that feels slow or bloated.
- Click "Optimize PDF".
- Duplicate fonts and images are merged and unused data removed.
- Download the optimized PDF.
When to use Optimize PDF
Reducing a PDF before uploading to a web server, shrinking a portfolio before emailing, or preparing documents for long-term digital archiving.
Key features
- Duplicate Fonts Merged — Fonts and images repeated in merged PDFs are stored only once.
- Shows Exact Savings — Displays the original size, new size, and percentage reduction after processing.
- Removes Redundant Objects — Strips duplicate resources and unreferenced objects from the file.
- No Visual Changes — Page content, images, and fonts are completely untouched.
- Works Best on Complex PDFs — Most effective on PDFs generated by desktop software with structural overhead.
Frequently asked questions
What does optimizing do?
It merges duplicate fonts and images (very common after merging PDFs), removes unused objects, compresses uncompressed data and packs the file structure. Quality does not change at all.
How is this different from Compress PDF?
Optimize is lossless. Compress PDF also re-compresses photos for much bigger savings.
What if nothing can be saved?
You get your original file back, with a message telling you it was already well optimised.
When should I optimise a PDF?
After merging many files, or when a PDF opens slowly — repeated fonts and images are the usual cause, and optimising removes them without touching quality.
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