Compress PDF Online

Reduce PDF file sizes by up to 90% while keeping your documents readable. Free, fast, and secure.

What Can You Do With Our PDF Compressor?

Our free online PDF compressor reduces file sizes significantly while preserving text sharpness and document structure — ideal for email attachments, web uploads, and saving storage space.

  • Choose from 3 compression levels: Low (best quality at 300 DPI), Medium (balanced at 150 DPI), or High (smallest size at 72 DPI)
  • Convert color PDFs to grayscale for even greater file size reduction — perfect for text-heavy documents and forms
  • Compress scanned documents, reports, presentations, and ebooks while keeping text fully readable
  • Batch compress up to 10 PDFs at once with detailed before/after size comparison
  • Ideal for reducing PDFs before emailing, uploading to portals, or archiving

How It Works

1

Upload PDFs

Drag and drop or browse to select your PDF files. Supports files up to 50 MB each.

2

Choose Settings

Select your compression level (Low, Medium, or High) and optionally enable grayscale conversion for extra savings.

3

Download Results

Review the before/after file sizes, see your savings percentage, and download your compressed PDFs individually or all at once.

Up to 90% Smaller PDFs

Advanced compression powered by Ghostscript reduces PDF file sizes dramatically — scanned documents and image-heavy PDFs see the biggest savings.

3 Compression Levels

Low compression for print-quality output (300 DPI), Medium for a balance of quality and size (150 DPI), or High for maximum compression (72 DPI).

Fast Processing

Most PDFs compress in seconds, even large documents. Our server-side processing handles the heavy lifting so your device stays responsive.

Grayscale Conversion

Optionally convert color PDFs to grayscale for additional file size reduction. Ideal for text documents, forms, and contracts where color isn't needed.

Secure & Private

Your PDFs are processed securely and automatically deleted after compression. No data is stored or shared with third parties.

Works Everywhere

No software to install. Compress PDFs from any device — desktop, tablet, or mobile — using just your web browser. Free, no signup required.