Large PDFs get rejected by email and online application forms. This tool shrinks a PDF by optimising the images inside it, so scanned and photo-heavy documents usually see the biggest savings. It also tells you how much smaller each file became.
How to use Compress PDF
- Select one or more PDF files.
- Choose Recommended, Strong or Extreme compression.
- Click Compress PDF and download the smaller file.
Frequently asked questions
How much can a PDF be compressed?
It depends on the content. Files with many photos shrink the most, while text-only PDFs are often already small. If a file cannot be made smaller, your original is kept.
What do the compression levels do?
Recommended and Strong recompress JPEG images and leave text and vector graphics untouched. Extreme turns each page into an image for the smallest size, so text can no longer be selected.
Is Compress PDF free?
Yes. It is a premium tool that free users can run by watching a short ad. Premium members use it without ads.
Can I compress a PDF for a form with a size limit?
Yes. Start with Recommended, then try Strong or Extreme if the file is still over the limit.