Compress PDF

Reduce PDF file size by stripping metadata and re-encoding objects. Note: image-heavy PDFs will see only modest savings.

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// Guide

How to use Compress PDF

Compressing PDFs is essential when you need to email a report, upload an application, or stay under a portal's file-size limit. ToolHub shrinks PDFs locally in your browser.

  1. 01

    Upload the PDF you'd like to compress.

  2. 02

    Choose a compression level (low, medium, or high).

  3. 03

    Click 'Compress PDF' and wait for the optimization to finish.

  4. 04

    Download the smaller PDF — typically 40-70% lighter.

Pro tips

  • Use 'high' compression for image-heavy PDFs and 'medium' for text reports to keep clarity.
  • If your PDF is already optimized, the savings will be smaller — that's normal.

Frequently asked questions

Will text become blurry?+

Text stays sharp. Only embedded images are recompressed.

Is there a size limit?+

No upload limit since processing happens in your browser.