Compress PDF on Windows

Decrease PDF size on Windows in seconds, right in your browser. Make a PDF smaller while keeping text sharp. Works on Windows, with nothing to install. Files never leave your device. No sign-up, no watermark.

or drop a file here

Files stay on your device. Nothing is uploaded.

How to compress your PDF on Windows

  1. 1

    Open this page in Edge or Chrome on your Windows and add your PDF.

  2. 2

    Choose a compression level or a target size.

  3. 3

    Click Compress and download the smaller PDF.

Compress PDF on Windows: built-in options vs this tool

Windows has no built-in PDF compressor. This page works in Edge or Chrome without installing anything.

It runs in Edge, Chrome or Firefox on Windows 10 and 11, with no software to install and nothing to uninstall later.

Private by design

Your file is processed by your own browser, in memory. It is never uploaded, stored or seen by anyone, and the page’s security policy blocks it from sending data to other servers.

Frequently asked questions

How do I shrink PDF size Windows?

Open this page in Edge or Chrome on your Windows and add your PDF. Choose a compression level or a target size. Click Compress and download the smaller PDF. It runs in the browser on Windows, with nothing to install.

Does it work on Windows?

It runs in Edge, Chrome or Firefox on Windows 10 and 11, with no software to install and nothing to uninstall later.

How do I compress a PDF?

Add the PDF, choose a compression level (or a target size), then click Compress PDF. The result shows the before and after size.

Will compression make my PDF blurry?

Text and vector graphics are never touched, so they stay sharp. Only images are recompressed. Light keeps images close to the original; Strong is visibly softer on photos.

Why didn’t my PDF get much smaller?

PDFs made from text (exported from Word, for example) contain few images, so there is little to compress. Large savings come from scans and photos.

How small does a PDF need to be for email?

Gmail and Yahoo accept attachments up to 25 MB, Outlook.com up to 20 MB. Staying under 10 MB is safest because some company mail servers set lower limits.

Related tools