How much can it reduce size?

Scanned files with high-res images can see up to 90% size reduction.

Is there a file size limit for uploading PDFs to the compressor?

No. Since all PDF compression runs locally inside your browser's memory, there is no upload size limit. You can compress files of any size, limited only by your computer's RAM.

Will compressing a PDF reduce the quality of the text and images?

Our Balanced Mode is optimized to shrink file sizes by downsampling images and removing metadata while preserving text clarity. For documents where image detail is critical, we recommend using the Maximum Quality setting.

Are my confidential PDF files uploaded to any servers during compression?

No. FolioPDF Pro uses browser-native WebAssembly technology. Your files are processed entirely in-memory on your local machine and are never uploaded to our servers or stored anywhere.

Does this compressor support password-protected PDF files?

To compress an encrypted or password-protected PDF, you must first remove the password using our PDF Unlock tool, and then run it through the compressor.

What compression presets are available?

We offer five presets: Maximum Quality (retains crisp graphics), Balanced (recommended for most files), Maximum Compression (smallest footprint), Email Friendly (optimizes for standard attachment limits), and Web Optimized (for fast online rendering).

Can I compress multiple PDF documents at the same time?

Yes. You can use our Batch Processing tool from the dashboard to compress multiple PDF files simultaneously in a single session.

Files never leave your device. Processing happens locally in your browser.

Browser Native

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Local Processing Active

Compress PDF

Reduce the size of your PDF file while retaining layout quality.

Drag & drop your PDF here

Choose advanced quality settings and size thresholds

PDF file only

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100% Client-Side

Your document stays in-memory. Zero server uploads. Unlike cloud-based PDF tools, all conversion, compression, and visual editing happens directly within your web browser. No document files are uploaded to any server. This guarantees that your sensitive information remains completely private.

How to use this tool

1
Upload your large PDF document.
2
Select compression preset (Low, Medium, High).
3
Download the compressed PDF.

Frequently Asked Questions

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