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Free Online Tool

Compress PDF Online

Reduce PDF sizes visually with adjustable compression sliders.

Drop your PDF file here

or click to browse file

Compress PDF files client-side • 100% private

How to Use Compress PDF Online

Follow these three simple steps to process your files.

Step 1

Upload PDF File

Drag and drop your PDF document into the dropzone or choose from local/cloud storage.

Step 2

Set Compression Level

Select Low, Medium, or High compression, or enter a target size in KB to shrink accordingly.

Step 3

Compress & Download

Click the Compress button to process the pages locally and download your optimized PDF.

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Compress PDF Online to Reduce File Size

Our online PDF compressor makes it simple to shrink the size of your documents without losing visual quality. Ideal for uploading to online portals or emailing large files. Since the compression occurs client-side within your browser, your private data never leaves your computer.

Frequently Asked Questions

Everything you need to know about Compress PDF Online

This tool renders each PDF page client-side to a canvas at a slightly lower scale/DPI and quality setting, re-encoding images to JPEG format. It then recompiles them into a fresh PDF, reducing the overall file size.