How to Compress a PDF
Step 1
Upload your PDF
Drag and drop your PDF file or tap to browse. No sign-up required.
Step 2
Choose compression
Pick a preset level or set a custom target file size in MB or KB.
Step 3
Download compressed
Click compress and download your smaller PDF instantly.
Why Use ModifyPDF to Compress PDFs?
100% Private
Your files are processed securely and deleted instantly.
Target File Size
Set an exact target size in MB or KB to hit strict upload limits.
Fast Compression
Compress heavy, image-rich PDFs in seconds.
Works on Mobile
Fully optimized for phones and tablets — no app needed.
Completely Free
No watermarks, no sign-up, no limits. Just compress.
Preserves Quality
Smart compression keeps text sharp and images clear.