压缩 PDF

Savings depend on the file's contents and the quality level you pick. The tool restructures the PDF using object streams and can strip metadata, which trims overhead. Image-heavy and bloated documents typically benefit the most.

Text stays sharp and searchable because it isn't rasterized. You choose a quality level from low to high to balance file size against fidelity, so you can favor smaller files or preserve more detail depending on the document.

Yes. There's an option to strip out metadata such as title, author, and keywords, which both reduces size slightly and removes hidden personal details. It's useful before sharing a document you'd rather not have tagged with your info.

There's no fixed server-side cap because compression runs locally in your browser. The practical limit depends on your device's available memory, so very large files work but may take longer on lower-powered machines.

Completely. No files are uploaded to any server; all optimization happens on your own device. That makes it safe for compressing confidential reports or contracts that you need to email or archive without exposing them online.