Compress PDF Online - Free PDF Size Reducer

Compress PDF files to shrink scans and image-heavy documents for email, sharing and upload limits. Choose recommended, high or extreme presets; the tool picks the smaller result when possible.

Drag file here or click to select

Compression level

Recommended High compression Extreme

Recommended balances quality and size; extreme shrinks scans the most.

1 uses

What is PDF Compress?

Compress PDF files to shrink scans and image-heavy documents for email, sharing and upload limits. Choose recommended, high or extreme presets; the tool picks the smaller result when possible.

Features

Three presets
Recommended balances quality; high and extreme shrink more
Smart output
Picks the smaller result between lossless and rasterized paths
No signup
Drag-and-drop upload, instant use
Bilingual UI
Chinese and English
Secure handling
Files are processed on the server and are not stored permanently.

Use cases

Email attachment size limits
Portal upload caps
Sharing large PDFs
Archiving before backup

How to use

Open the tool page
Upload your PDF
Choose options and run
Download the result

FAQ

QWill text stay readable?

Recommended works for most docs; use high/extreme for scans.

QWhat if the PDF is already small?

If nothing shrinks further, you get the original or near-original size.

QAre files uploaded?

Files are processed on the server and are not stored permanently.