Compress PDF Online
Compress PDFs online to make them smaller and easier to email, upload, or share. Drop your file, choose how aggressive you want the compression, and download a slimmer PDF in seconds.
- Works in your browser
- Files isolated to your workspace
- No software install required
Drop your PDF here
or click to upload
PDF, DOCX, JPG, PNG supported · Max file size: 100 MB
How to compress pdf online
- 1
Upload your PDF
Drag and drop your PDF onto the upload box or browse to select it from your computer.
- 2
Optimize the file
MyPDFKitty rebuilds the PDF with smaller assets while keeping it readable.
- 3
Download the result
Save the compressed PDF and use it for email, applications, or web uploads.
When to use this tool
- Your PDF is too large for Gmail or Outlook attachments.
- An online application or job portal rejects files over 5–10 MB.
- You're sharing scans, brochures, or reports that don't need print quality.
- You want to reduce storage on cloud drives full of PDFs.
Related PDF tools
Helpful guides
Frequently asked questions
How do I compress a PDF without losing quality?+
Upload your PDF, let MyPDFKitty optimize it, and review the result. Most documents shrink with no visible loss; if quality matters, keep the original and use the smaller copy only for sharing.
What's the maximum file size?+
Free accounts can compress PDFs up to 10 MB. Pro raises that to 100 MB and Business to 500 MB.
Is the compressed PDF safe to share?+
Yes. Files are uploaded over HTTPS and isolated to your account. Delete a file from your dashboard at any time.
Why is my compressed PDF still large?+
Image-heavy PDFs and scans compress less than text. Try splitting the PDF and compressing only the heaviest pages.
Compress PDF online now
Compress PDFs online to make them smaller and easier to email, upload, or share.