Compress PDF Online Free — Shrink to Any Size

Shrink PDFs by up to 90% with quality presets — or dial in an exact target size for stubborn upload portals. Batch mode compresses whole folders at once.

Free forever · No watermark · No signup · Files never leave your device. Use it right below — the interactive tool loads with this page.

How to use Compress PDF

  1. Upload one PDF — or many for batch mode
  2. Choose Light, Medium, Heavy, or Target size
  3. For portals, enter the MB limit (e.g. 1)
  4. Click Run and check the before/after sizes

Frequently asked questions

How do I compress a PDF under 1 MB?

Choose Target size mode and enter 1. The engine iterates quality and scale until the file fits — built for job and visa portals.

Will compression ruin readability?

Light and Medium keep text sharp. Heavy and target-size modes rasterize pages, trading selectability for size.

Can I compress many PDFs at once?

Yes. Upload multiple files and every one is compressed with the same settings, delivered as a ZIP.

Which preset should I choose?

Light for archiving, Medium for everyday sharing, Heavy for messaging apps, Target size when a portal dictates the exact number.

Does compression work well on scans?

Scans compress the most since they are photos. Text-born PDFs shrink less — there is simply less to squeeze.

What happens with very large PDFs?

Files over the fast-path cap switch to streaming mode automatically: pages render one at a time into batched PDFs up to ~1 GB. Output is rasterized, so use Lossless only for smaller files.

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