Compress PDF Online

Compress PDF files online with RatPDF — reduce size for email and portals. Ghostscript-powered, free tier available.

Compress PDF Online

Use RatPDF's free PDF compressor — Ghostscript-powered, no signup required.

Compress PDF Hub Compress Now

This guide covers Compress PDF Online. Start at PDF Compressor on ratpdf.com.

Before you compress

Merge related files with Merge PDF if a portal allows one upload. Remove unused pages with Split PDF first.

Quick workflow

Open RatPDF PDF Compressor.
Upload your PDF.
If the file is scanned, run OCR PDF first.
Compress — Download the smaller PDF.

How it works

Open the PDF Compressor
Navigate to ratpdf.com/pdf/compress in any modern browser.
Upload your PDF
Drag and drop your file or click the upload zone. Password-protected PDFs are supported if you enter the password.
Select compression level
Choose Recommended for balanced quality, Extreme for maximum size reduction, or Less for minimal quality impact.
Download the result
Click download when processing completes. Verify file size locally before submitting to portals or email.

Compress PDF Hub

Compress PDF to 100KB

Compress PDF to 200KB

Compress PDF to 500KB

Compress PDF Under 1MB

Compress PDF for Email

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