Compress PDF
Reduce PDF file size for email, forms and uploads while keeping it readable. Free online PDF compressor.
- 100% private Files stay on your device
- Free No sign-up or watermark
- Fast Results in seconds
How to use Compress PDF
- Select the PDF you want to shrink.
- Choose a compression level.
- Click Compress PDF.
- Compare the sizes and download the smaller file.
Why use PDFFlow Compress PDF
Three levels
Lossless clean-up, recommended image compression, or extreme reduction for tight upload limits.
See the savings
PDFFlow shows the before and after size so you know exactly what you gained.
Never bigger
If a level cannot make your file smaller, PDFFlow tells you instead of handing back a larger file.
Frequently asked questions
How do I compress a PDF file?
Upload the PDF, pick a compression level and click Compress PDF. Online PDF compression here is free and reduces the file size so it fits email and upload limits.
Can I compress a PDF online for free?
Yes. You can compress PDF documents online for free, as often as you like, without a watermark or sign-up.
Which compression level should I choose?
Recommended suits most documents and scans. Use Extreme when a portal has a strict size limit. Use Lossless when you need to keep text selectable and only want a light clean-up.
Will the text stay selectable?
With the Lossless level, yes. The Recommended and Extreme levels re-render every page as an optimized image, which gives the biggest savings but makes the text non-selectable.
Are my files uploaded to a server?
No. PDFFlow processes your files entirely inside your browser using JavaScript. Nothing is uploaded, stored or seen by anyone else, and the result is created on your own device.
Is this tool free?
Yes. Every PDFFlow tool is free to use with no sign-up, no watermark added to your files and no daily task limit.