📄 Compress PDF Online

Reduce PDF file size for easy email sharing and storage

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Click or drag & drop a PDF here

How to compress a PDF

  1. Upload your PDF file to see file information
  2. For actual compression: use Ghostscript command line or online tools like ilovepdf.com
  3. Ghostscript settings: /screen (72dpi, small), /ebook (150dpi), /printer (300dpi)
  4. Removing unused fonts and images reduces size by 40-80%
  5. PDF/A format is optimized for archiving

Frequently Asked Questions

How do I compress a PDF online?

Upload the PDF file, choose the compression level, and click Compress PDF. The result downloads automatically.

How much can a PDF be reduced in size?

Depending on content, file size can be reduced by 30–80% without visible quality degradation.

Is it safe to upload documents for compression?

Documents are not stored on the server — they are deleted immediately after processing.

Are password-protected PDFs supported?

Remove the password protection first, then upload the file for compression.

What is the maximum PDF size for upload?

The maximum file size is 50 MB.

Why choose AtlasImg?

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Fast

Processing happens instantly right in your browser

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Secure

Files are never uploaded to any server — everything stays local

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Free

All tools are completely free with no limitations or watermarks

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Any Device

Works on desktop, tablet, and smartphone browsers