Compress PDF

Reduce the file size of your PDF documents.

Uses 'Screen' optimized settings (72 dpi) for maximum compression.

Compress PDF Online for Free

Is your PDF file too large to email? Use our free PDF Compressor to significantly reduce the file size of your documents while maintaining excellent visual quality. Our optimization algorithm removes redundant data and compresses images, creating a lighter version of your PDF perfect for uploading to websites or sharing via email.

Key Features

  • Free Forever: No subscription or payment required
  • No Signup: Use instantly without creating an account
  • Up to 80% Reduction: Image-heavy PDFs compress dramatically
  • Browser-Based: Works on Windows, Mac, Linux, iOS, Android
  • Private & Secure: Files deleted from servers within 1 hour

Related tools: Merge PDF — Split PDF to reduce size first — PDF to Word

Frequently Asked Questions

Upload your PDF to Dashing Work's Compress PDF tool, choose your compression level, click Compress, and download the smaller file. No registration required.

We use advanced algorithms (powered by Ghostscript) to downsample embedded images, remove unused metadata, and optimize data structures — reducing file size without ruining readability.

It depends on the content. Text-heavy PDFs shrink modestly (10-30%). Image-heavy PDFs often compress by 50-80% with no visible quality difference on screen.

On a screen, it will look almost identical. We optimize for screen quality, which is standard for web sharing and email attachments.

For very large PDFs, consider splitting them first using the Split PDF tool, then compressing the smaller parts separately for best results.

Yes. The Compress PDF tool is fully browser-based and works on Windows, Mac, Linux, iOS (iPhone/iPad), and Android without any software installation.

No. Dashing Work tools are completely free with no daily usage limits, no watermarks, and no signup required.

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