SunPDF

Compress PDF online

Reduce an image-heavy PDF when an upload or email limit is a problem while keeping native text and vector graphics intact.

or drop the file herePDF · Up to 50 MB per file

Your PDF stays on your device. It is not sent to any server.

How it works

  1. Choose a file
  2. Preview
  3. Download

What you can do

  • High quality
  • Balanced
  • Smallest size

See the tool in action

Compress PDF, SunPDF
Real SunPDF screenshot for “Compress PDF”, created with a fictional practice document containing no personal data.

Try the example

Fictional file created by SunPDF with no personal data.

Compress the document with the Balanced profile. Compare sizes, then check that all three headings and body text remain readable.

What does this PDF tool do?

SunPDF first identifies images that can benefit from recompression, applies the selected profile, and also tests structural QPDF optimization without rasterizing pages. The smallest valid candidate is retained. The workspace compares before and after sizes and explains when no worthwhile reduction can be kept.

Document processing happens in your browser. SunPDF does not upload your PDF to a server for editing. Closing or refreshing the tab ends the current session.

When to use this tool

High quality favors reading and printing, Balanced suits everyday sharing, and Smallest size helps when the file limit matters most.

How to check the result

Review the reported reduction, zoom into images and transparency, search for sample text, and reopen the PDF in another reader before sending it.

Continue with another tool

PDF to JPGJPG to PDFEdit a PDFOrganize PDF pages

Guides for this tool

Follow the steps and checks to make before saving your document.