About this tool
PDFs bloated with high-resolution images or inefficient encoding can be far larger than they need to be for sharing or emailing, where many providers enforce attachment size limits. This tool re-processes a PDF to reduce its overall file size, primarily by re-compressing embedded images, while keeping the document's text, layout, and page count intact. It's a quick fix for a PDF that's too large to email, upload to a form with a size cap, or share over a slow connection. Because compression happens using your browser's own processing rather than a remote server, documents containing sensitive contracts, records, or personal information never have to leave your device.
Frequently asked questions
Does compression affect the readability of text in the PDF?
No — text remains sharp and selectable; compression primarily targets embedded images, which are the usual cause of oversized PDFs.
How much smaller will my file get?
It depends heavily on content — PDFs with many high-resolution images typically shrink the most, while text-only PDFs may see minimal reduction since there's little to compress.
Is the page count or layout changed?
No, compression only reduces file size; the number of pages, text, and layout remain exactly as they were.
Is my PDF uploaded to a server?
No, all processing happens locally in your browser using JavaScript.
Can I compress a password-protected PDF?
Password-protected or encrypted PDFs generally need to be unlocked first, since the tool needs to read the file's contents to re-process it.