Optimize PDF — Shrink File Size Without Losing Quality
Clean up bloated PDFs and reduce their file size without re-encoding a single image. The optimizer rebuilds your document to drop unused objects, duplicate fonts, and stale metadata, then saves it with compressed object streams. Watch the before/after comparison update live — all 100% in your browser.
Frequently Asked Questions About Optimizing PDFs
How does PDF Optimize work?
The document is re-saved with pdf-lib, which discards unused objects, merges duplicate resources, and enables compressed object streams. You see the before/after size and the percentage saved.
Will my PDF be smaller after optimizing?
Usually yes. Files built from imports, merges, and repeated saves accumulate bloat that this tool removes. Already-efficient PDFs may stay the same size or grow slightly.
Is it safe for documents that need exact layout?
Yes. Optimizing preserves page content, images, and layout precisely — it never re-encodes images or changes text, so the visual result is identical.
Are there limits on file size or page count?
No hard limits — the only constraint is your device memory. Most documents optimize instantly in the browser.