Compress PDF - Reduce PDF File Size Online for Free - ratpdf.com

Compress PDF - Reduce PDF File Size Online for Free

Large PDF files are hard to share, slow to upload, and waste storage space. Our free PDF compressor reduces file size while preserving text, images, and formatting.

Upload your PDF – we’ll optimize it using smart compression algorithms. No watermarks, no file size limits (up to 100 MB), and your files are automatically deleted after 2 hours.

Try our PDF compression tool to reduce file size while maintaining quality.

Try Our Tool

Choose compression level

Basic – minimal size reduction (fastest)
Recommended – best quality/size balance
Maximum – smallest file size (slightly lower image quality)

Why use ratpdf.com PDF compressor?

✅ Completely free – no hidden fees
✅ No sign-up or email required
✅ 256-bit SSL encryption – secure uploads
✅ Works on any device (mobile, tablet, desktop)
✅ No software installation needed

How to compress a PDF in 3 easy steps

Upload your PDF file (drag & drop or click).
Select compression level – Basic, Recommended, or Maximum.
Download the compressed PDF instantly.

PDF compression guides

Explore our hub-and-spoke guides for every compression intent — size targets, email uploads, device tips, and competitor alternatives.

Use the main tool at /pdf/compress — our canonical PDF compressor URL.

Frequently Asked Questions

Does compression reduce the quality of my PDF?

Not noticeably. We use lossless compression for text and vector graphics. For images, you can choose between levels – 'Recommended' keeps excellent quality while reducing size significantly.

Are my files secure?

Yes. All uploads are encrypted with SSL/TLS. Files are automatically deleted from our servers within 2 hours. We never store or share your documents.

What is the maximum file size?

You can compress PDFs up to 100 MB for free. Larger files? Contact us for a custom plan.

Can I compress multiple PDFs at once?

Currently, one file per session. But you can repeat as many times as you need – no waiting.

Do I need to create an account?

No registration or login required. Everything works right in your browser.