Drefly
All tools

Compress PDF Free, Reduce File Size

Upload a PDF, pick a compression level, and download a smaller file.

  1. 1Upload PDF
  2. 2Pick a level
  3. 3Preview and download
Drop your PDFs here Many PDFs at once, up to 1000 pages each Choose PDFs
Compression level i

Compress PDF questions, answered.

How does PDF compression work?

Drefly re-encodes embedded images at a lower quality and resolution, then rebuilds the PDF with optimized internal structure.

Which compression level should I use?

Low keeps the most quality with modest savings, Medium balances size and quality, and High gives the smallest file for text-heavy documents.

Will compression affect text quality?

Text and vector content stay sharp - only embedded raster images are recompressed, so scanned pages shrink more than text-based PDFs.

Is compressing a PDF free?

Yes, compressing a PDF is completely free with no signup and no limit on file size.

Which compression level should I pick?

Use light compression to keep quality nearly identical, medium for a good balance, or strong when file size matters most, like email attachment limits.