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Compress PDF Online

Reduce PDF file size dramatically while preserving quality. Perfect for email attachments and web uploads.

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Drop your file here

or click to browse — Upload one file

Choose File

Compression Level

🔒 Your files are processed locally and never uploaded to our servers

How It Works

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1. Upload

Select your PDF file by clicking or dragging it into the upload area.

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2. Process

Click the button and PDFFlow processes your file instantly in the browser.

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3. Download

Your output file is ready. Click download and save it to your device.

Frequently Asked Questions

How PDF Compression Works +

PDFFlow analyzes your PDF and applies a combination of image downsampling, font subsetting, and content stream compression to reduce the file size while keeping text crisp and readable.

How Much Can I Reduce a PDF? +

Typical compression rates are 20-80% depending on content. PDFs with large images compress the most. Text-only PDFs may see less reduction.

Will My PDF Lose Quality? +

Using the Recommended setting, quality loss is imperceptible. High compression may slightly reduce image resolution but text always remains sharp.