How much file size reduction can I expect?

Scanned documents and image-rich files generally achieve 50% to 85% file size drops. Vector text reports and invoices achieve 20% to 50% reduction while retaining 100% vector typography crispness.

What is the difference between Extreme and Lossless compression?

Extreme compression gives you the smallest possible file size by optimizing large photos. Lossless compression keeps all your text and pictures looking 100% identical while cleaning up hidden background clutter to reduce file size.

Compress PDF — Free In-Browser PDF Suite

How to Use Compress PDF in 3 Simple Steps

Upload Document

Drag and drop your PDF file or click to select from your device.

Choose Compression Preset

Select Extreme (max size drop), Recommended (balanced), Light, or Lossless Stream Compaction.

Instant Download

Click Compress & Download to save your optimized file with verified size reduction.

Frequently Asked Questions

Yes, 100%. Your files never leave your computer or phone. Unlike other websites that upload your files to their servers, MistPDF shrinks your PDF directly inside your own web browser so nobody else ever sees your documents.