Does this compress images inside the PDF?

Stream deflating and object table compression are applied locally. For scanned image-only PDFs, converting pages to compressed WebP/JPG and rebuilding creates extreme reductions.

Scan & Optimize

100% Client-Side Privacy

pdf-lib & Stream Optimizer

Compress PDF

Optimize PDF structure, strip redundant metadata, de-duplicate structural dictionaries, and compress stream objects directly in the client browser.

Select or drop your PDF document here

Processed locally in your browser. 100% private.

Browse Fileor Paste (Ctrl+V)

Supported: .pdf, application/pdf (Max 80 MB)

How to Use Compress PDF

Follow these easy steps to process your file right in your browser.

1Step 1

Choose PDF file

Upload the PDF you want to compress. Our tool inspects the structure and stream tables.

Instant local processing

2Step 2

Select compression intensity

Choose between Standard Optimization (cleans metadata, compresses object streams) or Strong.

Instant local processing

3Step 3

Optimize document

Click "Compress PDF". Our engine restructures cross-reference tables and compresses raw streams.

Instant local processing

4Step 4

Review savings and download

Compare the initial file size with the optimized size and download your lighter PDF.

Instant local processing

Frequently Asked Questions

Common questions about Compress PDF and browser processing.

Compression effectiveness depends on what makes the PDF large. Text-heavy PDFs and unoptimized vector documents shrink substantially. PDFs already containing pre-compressed JPEG scans may see modest reduction.