How do I compress a PDF online for free?

Simply upload your PDF file to CrushMyPDF, choose your compression level (Low, Medium, or High), and click compress. Your smaller file will be ready to download in seconds. No registration or payment required.

Will compressing my PDF reduce the quality?

It depends on the compression level. Low compression (5-15% reduction) maintains near-original quality. Medium compression (25-40%) is ideal for most documents. High compression (75-90%) may reduce image quality but keeps text sharp.

What is the maximum PDF file size I can compress?

CrushMyPDF accepts PDF files up to 15MB. For larger files, you can split them into smaller sections first.

Fast & Secure

Compress PDF Online

Reduce your PDF file size in seconds without losing quality. The simplest professional tool for shrinking documents for email and web uploads.

Choose Your PDF

Click to select or drag & drop your PDF

Max 15 MB

Compression Level

Best Quality

5-15% reduction

Balanced

25-40% reduction

Maximum

75-90% reduction

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Why Compress Your PDF?

Large PDF files can be a pain. They're slow to upload, take up space, and often exceed email attachment limits. Our tool solves this instantly.

Email Ready

Never worry about "file too large" errors again. Shrink PDFs to fit Outlook, Gmail, and Yahoo limits.

Web Optimization

Optimized PDFs load faster on websites and are easier for users to download on mobile devices.

100% Private

Your files are processed on secure servers and deleted automatically within 5 minutes. Guaranteed.

Related Resources

Compress PDF for Email

Gmail, Outlook & Yahoo attachment limits guide

How It Works

Step-by-step compression guide

FAQ

Common questions answered