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Compress PDF

Reduce your PDF file size while preserving the best possible quality. Choose your compression level and download instantly.

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Max file size: 40 MB · for higher limits

Drop a PDF here or browse

One PDF file · Max 40 MB

What is Compress PDF?

The Compress PDF tool reduces the file size of your PDF documents while maintaining the best possible visual quality. Whether you need to email a large report, upload a document to a web form, or simply free up storage space, this tool makes it easy. Choose from three quality presets — Maximum Compression for the smallest file, Balanced for a good size-to-quality trade-off, or Minimum Compression to keep quality as high as possible. If the compressed file ends up larger than the original, the tool will tell you and will not force a download. All processing happens entirely in your browser.

How It Works

Upload your PDF using the drop zone or file picker. Select your preferred compression quality: Maximum Compression targets the smallest possible file size, Balanced offers a practical middle ground, and Minimum Compression preserves near-original quality. Click "Compress PDF" and the tool processes the file locally using WebAssembly. A comparison shows the original size versus the compressed size and the percentage saved. If compression succeeds, click download. If the file cannot be reduced in size, an error message is shown instead of a download.

Key Benefits

  • Three quality presets to balance file size vs. visual quality
  • Shows exact size reduction and percentage saved before downloading
  • Never downloads a larger file — shows an error if compression fails
  • 100% private — no file upload, no server processing
  • Re-compress as many times as needed with different quality settings
  • Free to use — no account required for standard file sizes

Frequently Asked Questions