Compress PDF Online — Reduce File Size for Free
Shrink your PDF for email or cloud storage by re-optimising pages with browser-side compression. Choose light, balanced, or strong to balance quality against file size.
How to compress pdf online — 3 easy steps
- Step 1: Drop the PDF you want to compress.
- Step 2: Pick compression level: light, balanced, or strong.
- Step 3: Click Compress and download the smaller PDF.
Why use FileMasterPDF to organize and manage PDF pages
- No page limits: reorder as many pages as you need, completely free.
- 100% private: PDFs processed locally — never uploaded to any server.
- No account needed: open the tool and start immediately, no signup.
- Preserves quality: page content is never recompressed or degraded.
- All devices supported: tested on Chrome, Firefox, Safari, Edge, iOS, and Android.
Frequently asked questions — Compress PDF
How much will file size reduce?
Image-heavy PDFs often shrink 40–80%. Text-only PDFs reduce by less.
Will quality suffer?
Light compression is lossless. Stronger settings reduce image resolution but keep text sharp.
Is there a file size limit?
No fixed limit — only your browser memory is the constraint.
Does it remove password protection?
No — use Unlock PDF first if the file is password-protected.