Compress PDF Online
Compress and optimize PDF files online for free with browser-side processing. Reduce PDF overhead without uploading your document.
What this utility does
Optimize PDF structure for easier sharing and storage without sending the document to a server.
How to use this tool
- Choose the supported input in the tool above.
- Adjust the available settings and review the preview or file details.
- Download the result after processing finishes in your browser.
Supported input, limits, and privacy
- Supported input
- One PDF file
- Important limitation
- This is structural optimization rather than aggressive image recompression, so image-heavy scans may not shrink.
- Privacy
- Processing happens on your device. Files are not sent to an external conversion API.
Frequently asked questions
- Can compression always make a PDF smaller?
- No. PDFs containing already-compressed scans or images may stay the same size or become similar in size.
- Are PDF pages or images changed?
- The tool focuses on PDF structure and does not aggressively downsample embedded images.