ZeroUpload.in
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Compress PDF

Optimize PDF file size in the browser by re-encoding embedded image streams and removing redundant metadata.

Privacy Guaranteed:
Processed 100% locally in your browser. Files never touch our servers.

How to use Compress PDF

1

Upload PDF

Choose a PDF document to compress.

2

Select Compression Level

Choose between Strong, Balanced, or High Quality optimization presets.

3

Download

Review actual byte savings and download your optimized PDF.

Frequently Asked Questions

PDFs that contain uncompressed high-resolution images will see massive compression (50-80%). PDFs containing purely text or already compressed vectors will show smaller gains, and we show genuine statistics.

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