Compress PDF
Reduce PDF file size by recompressing images and restructuring the file, and see the before and after size before you download.
How to use Compress PDF
- Choose a PDF to compress.
- Pick a Compression level: Lossless, Recommended or Extreme.
- Click Compress PDF.
- Compare the sizes and click Download PDF.
Frequently asked questions
Does compressing a PDF reduce quality?
Lossless doesn't touch quality; it only restructures the file. Recommended recompresses photos at a resolution that still looks sharp on screen. Extreme turns every page into an image, so text can no longer be selected or searched.
How can I make a PDF smaller for email?
Try Recommended first. If the file is still too large, Extreme gives the smallest result, at the cost of selectable text.
Why didn't my PDF get any smaller?
Some PDFs are already well compressed. If a level can't make it smaller you get the original back, and you can try a stronger level.
Is it safe to compress a PDF online here?
Yes. The PDF is compressed in your browser with qpdf and pdf-lib running locally, so it is never uploaded.