PDF Tool

Compress PDF Files

Compress PDF files using lossless or lossy algorithms. Choose from preset levels or customize DPI, JPEG quality, and more for the perfect balance of size and quality.

Drop your file here, or browse

Single PDF file

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How to Compress PDF

  1. Upload your PDF

    Drop your PDF into the upload area or click to browse.

  2. Choose compression level

    Select Low (lossless), Medium, High, or Custom. Adjust settings and preview the quality comparison.

  3. Compress and download

    Click "Compress & Download" — see the before/after size savings and download your optimised PDF.

Features

  • 4 compression levels including custom
  • Side-by-side quality preview
  • Before/after file size comparison
  • Custom DPI and JPEG quality controls
  • Grayscale conversion option

Frequently Asked Questions

How much will my PDF be compressed?
Lossless compression typically reduces size by 10–30%. Medium (default) achieves 40–70%. High compression can reach 60–90% reduction.
Will compression reduce visual quality?
Lossless mode maintains full quality. Medium and High modes re-encode images — use the side-by-side preview to check quality before downloading.
What is the Custom mode?
Custom lets you set the exact JPEG quality (1–100), DPI target, grayscale conversion, and font stripping for precise control.
Does this work for scanned PDFs?
Yes — scanned PDFs (which are essentially images) benefit significantly from image re-encoding compression.