Is Compress PDF free?

Yes, Compress PDF on PDF Merge Toolkit is completely free. No subscription, no sign-up, and no watermarks on your output.

Are my files safe when using Compress PDF?

Yes. All files are transferred over 256-bit SSL encryption and are permanently deleted from our servers within 30 seconds of processing. We never read or store your document contents.

Do I need to create an account?

No account or sign-up is required. Simply visit the page, upload your file, and download the result.

What is the maximum file size?

The maximum file size is 20 MB per upload. For larger files, try compressing your PDF first using our free Compress PDF tool.

🔒 We never store your data ✦ ⚡ Lightning fast conversions ✦ ✅ 100% Free — No sign-up required ✦ 🌐 Works entirely in your browser ✦ 🚫 No watermarks on any output ✦ 📄 48+ PDF tools in one place ✦ 🔒 We never store your data ✦ ⚡ Lightning fast conversions ✦ ✅ 100% Free — No sign-up required ✦ 🌐 Works entirely in your browser ✦ 🚫 No watermarks on any output ✦ 📄 48+ PDF tools in one place ✦

All Tools

Compress PDF Online Free

Reduce file size while keeping quality — no sign-up, no watermark

Drag & drop your PDF here

Compression Level

Image Quality 75%

Smaller file Better quality

Remove metadata (title, author, creation date)

Medium suits most PDFs. High gives the smallest file. Image Quality only affects embedded images.

Max file size: 20 MB. One PDF only. Output is a compressed .pdf.

Tool Guide

Why use Compress PDF Online?

Upload your PDF and select a compression level. Our engine reduces file size by optimising images and removing redundant data — without visible quality loss. Download the smaller PDF instantly. Files are deleted from our servers within 30 seconds.

Reduces file size without visible quality loss
Choose your compression level
Output PDF stays fully readable and printable
No watermarks added — ever

Upload

Select or drag your file

Process

One click — done instantly

Download

Save your result file