Free online tool

Compress and optimize a PDF

Re-save a PDF with compact object streams in your browser. This lossless structural optimization does not rasterize pages; image-heavy scans may shrink only slightly or can remain the same size.

Open the interactive Compress PDF

The interactive tool loads in the page. Enable JavaScript to enter data, process content, and download results.

Quick guide

How to use this tool

  1. 01Select a PDF from your device.
  2. 02Run structural optimization and compare before-and-after sizes.
  3. 03Download the optimized file and check that it meets your needs.

Capabilities

Features and supported formats

  • Uses compact PDF object streams.
  • Preserves page text and vector content rather than rasterizing it.
  • Shows the actual size change, including when a file does not get smaller.

Supported formats

Input: PDF. Output: PDF.

Answers

Frequently asked questions

Will every PDF become smaller?

No. PDFs with already-compressed content or large embedded images may show little or no reduction. The result panel reports the actual size change.

Does compression reduce image quality?

This tool uses structural optimization and does not rasterize pages or recompress their images, so it does not offer image-quality levels.