Compress PDF
Add your PDF and choose how much to shrink it.
Your file stays on your device: it's never uploaded to any server
Free up to 10 MB per file — go Pro to process files with no size limit.
Drag your PDF here or click to choose it
⏳ This file is large — it may take a few seconds longer than usual.
How to reduce the size of a PDF
Add your file, choose the compression level for what you need (more quality or more size saved) and click "Compress PDF". In a few seconds you'll see how much the size dropped and you can download the result. As with all MásPDF tools, the file is never uploaded to any server: the whole process happens in your own browser.
Frequently asked questions
Are my files uploaded to any server?
No. The whole process happens in your own browser, so your files never leave your device: they're not uploaded, not stored, and nobody sees them.
Is it free? Are there any limits?
Yes, it's free, with no watermarks and no sign-up. The free plan supports files up to 10 MB (and up to 5 at a time in the tools that combine several PDFs); MásPDF Pro removes those limits.
Do I need to install anything or create an account?
No. It works right in your browser, on desktop or mobile. You can also install it as an app and use it offline.
Do I lose a lot of quality when compressing the PDF?
You choose how much to compress. For reading on screen or emailing, you'll barely notice; for printing, compress less.