Compress PDF

PDFProcessed Locally — 100% Private

Reduce PDF file size in-browser.

Compress PDFReduce PDF file size by optimizing stream structures & stripping redundant metadata

Drop a PDF file to compress

Fast on-device optimization — no files are uploaded to any server

How to Use Compress PDF Online

Compress and reduce PDF file size directly in your browser. Optimize embedded images, strip redundant metadata, and shrink PDF documents to meet email attachment and portal upload limits.

Step 01

Input & Prepare

Select the PDF file you wish to compress from your device.

Step 02

Configure & Adjust

Choose your preferred compression level (High, Balanced, or Low Compression).

Step 03

Export or Copy

Preview the reduced file size and download your optimized PDF instantly.

Common Use Cases

Reduce PDF file size to pass 10MB or 25MB email attachment limits
Optimize heavy PDF portfolios, brochures, and catalogs for fast web viewing
Shrink scanned government documents and ID scans for online visa or job applications
Save local disk space when archiving thousands of digital documents

Technical Specifications & Limitations

Text-only PDFs without images are already highly compact; compression yields the biggest reductions on scanned or image-heavy documents.

Frequently Asked Questions

How does in-browser PDF compression work?

The tool analyzes embedded images, downsamples excessive resolutions, and cleans unneeded object streams locally in WebAssembly.

Will my text remain sharp after compressing?

Yes! Vector text and font glyphs remain perfectly crisp; only oversized bitmap images are optimized.

Is my confidential document secure?

100% secure. Processing occurs entirely in your browser RAM without transmitting data across the internet.

100% Client-Side Privacy Guarantee

DailyToolbox processes all operations using local WebAssembly and Web APIs inside your browser memory. No data, files, or sensitive inputs are ever uploaded to an external server or saved in tracking cookies.