Why this PDF optimizer

🔬 Analyze first

Before touching anything, the tool inspects your PDF — images, resolutions, fonts, objects, metadata — and tells you exactly what's making it big, with concrete recommendations.

🗜️ Real compression

Powered by Ghostscript and qpdf, it downsamples oversized images, recompresses streams, removes unused objects and enables Fast Web View — image-heavy PDFs often shrink 70–95%.

🎛️ You're in control

Pick Lossless, Balanced or Maximum, or fine-tune every step manually — DPI, JPEG quality, and what to strip. A size estimate shows the impact before you run it.

How to compress a PDF

  1. Upload your PDF. It's analyzed immediately and you get a full structure report plus recommendations.
  2. Choose a profile. Lossless (cleanup only), Balanced (300 DPI / JPEG 90%) or Maximum (150 DPI / 75%, strips extras) — or switch to manual.
  3. Review the estimate. See the predicted size before committing.
  4. Optimize & download. Get the smaller PDF plus a report of exactly what was done and the real before/after sizes.

Frequently asked questions

How much can it shrink my PDF?
It depends on the file. Image-heavy PDFs often shrink by 70–95% with Balanced or Maximum, because oversized photos are downsampled. Text-only or already-optimized PDFs shrink much less — the tool shows an estimate before, and the real before/after after.
What's the difference between the profiles?
Lossless only cleans up structure (removes unused objects, recompresses, enables Fast Web View) without touching images, fonts or text. Balanced downsamples images to 300 DPI at JPEG quality 90%. Maximum goes to 150 DPI at 75% and strips metadata, attachments, JavaScript and comments.
Will optimizing damage my PDF?
No. Text stays text, page order and content are preserved, and quality only changes if you choose a profile or option that touches images. Lossless never changes how the document looks.
Where is the file processed?
Optimization uses server-side Ghostscript and qpdf for the best results, so the PDF is uploaded to our own server, processed, and deleted immediately after — leftovers are removed automatically within 30 minutes. Nothing is stored permanently.
What is Fast Web View?
Fast Web View (linearization) restructures a PDF so it can start displaying the first page before the whole file has downloaded. The optimizer can enable it as part of any profile.
Can it optimize signed or encrypted PDFs?
Encrypted PDFs must be unlocked first. Signed PDFs can be analyzed, but optimizing rewrites the file and would invalidate the signature, so the tool warns you before proceeding.