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Compress PDF — Reduce File Size Online Free

Shrink PDF Size by Up to 90% Without Quality Loss

Reduce PDF file size significantly for free. Choose from different compression levels to balance between file size and quality. Perfect for emailing documents, uploading to websites, or saving storage space.

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Drop your file here

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Choose File

PDF

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Instant
Seconds to process
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Secure
Files never stored
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100% Free
No account needed
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How to Use Compress PDF

1

Upload your PDF file

2

Select compression level (low, medium, or high)

3

Click Compress and wait a few seconds

4

Download your smaller PDF file

Frequently Asked Questions

Depending on content, you can reduce PDF size by 30% to 90%. PDFs with images compress the most.
Our smart compression minimizes quality loss. We offer three modes: low compression (best quality), medium, and high compression (smallest size).
Yes, but gains will be smaller. Already-optimized PDFs may only reduce by 5–20%.
Common reasons include email attachment limits (typically 10–25MB), website upload limits, and saving storage space.

Learn More

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