Question 1

Will compressing my PDF reduce text or image quality?

Accepted Answer

Text elements and vector graphics are compressed losslessly and will not lose any quality. Images inside the PDF are optimized based on your selection: Extreme downscales resolution heavily, Recommended balances both, and Less preserves maximum quality.

Question 2

Is there a limit to the PDF file size I can upload?

Accepted Answer

We support PDF file uploads up to 100MB directly inside your browser. Because the compression runs client-side, the file does not get uploaded to external servers, making it fast and secure.

Question 3

Are my private documents safe with Online PDF Editing?

Accepted Answer

Absolutely. All parsing and optimization are performed locally on your device via JavaScript. Your file data never leaves your computer, ensuring absolute privacy.

Question 4

Does the output format remain standard?

Accepted Answer

Yes, the optimized document remains a fully compliant PDF file that can be opened, shared, and edited in any PDF viewer or printing utility.

Question 5

How do I compress a scanned PDF to make it smaller?

Accepted Answer

Scanned PDFs are mostly images, so choosing the Recommended or Extreme level lets the optimizer downscale and re-encode those images to make the PDF smaller. Everything runs in your browser, so your scanned document never leaves your device.

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How to Compress PDF Files

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