PDF optimizer
How PDF optimization works
Choose one PDF, then choose Optimize PDF. The result downloads as optimized.pdf: the same pages, rebuilt from scratch.
Good to know
- Everything happens in your browser. Your PDF is never uploaded or stored anywhere.
- The optimization is the rebuild itself: your page content and its fonts, images and other resources are copied into a fresh file, while document metadata, outlines (bookmarks) and unused objects are left behind.
- Pages keep their original size, fonts and images. Nothing is re-compressed, and no text or image is altered.
- The page reports the file size before and after, honestly — if the rebuild barely shrinks a file, it says so.
- This first version reads standard PDFs with classic cross-reference tables. Password-protected PDFs, and files that use newer compressed cross-references, cannot be read yet.
Questions
Is my PDF uploaded?
No. The optimization runs in your browser on your device, and your file never leaves it.
Which PDFs can be optimized?
Standard PDFs with classic cross-reference tables, which covers most PDFs. Password-protected PDFs, and files that use newer compressed cross-references, cannot be read by this first version.
How does the optimizer make the file smaller?
It rebuilds the PDF from scratch: every page, with its content, fonts, images and other resources, is copied into a fresh file, and document metadata, outlines (bookmarks) and unused objects are left out. Images are not re-compressed and fonts are not subset in this first version — the size saving comes from dropping what is not needed.
Will my pages look the same?
Yes. Page content, fonts and images are copied exactly; only metadata, outlines and unused objects are dropped. Your original file stays untouched on your device.
What is the new file called?
It downloads as optimized.pdf.