Compress PDF on Windows

Yes — that is exactly what this page does. Your browser is the only software involved. Windows itself provides no genuine compression feature; Print to PDF merely re-renders the document and typically discards selectable text in the process.

For compression specifically, yes. Acrobat Pro remains superior for editing, OCR, redaction and PDF/A archival conversion, but if your only need is reducing file size, this achieves comparable results at no cost and with better privacy since nothing is uploaded.

In almost all cases. It requires no installation, no admin elevation and no unusual network permissions. Because files never leave the machine, it also tends to satisfy IT policies that explicitly prohibit uploading company documents to third-party web services.

Because it was already efficient. Files that are mostly text, or that were exported by a tool which already downsampled its images, hold very little recoverable waste. Large savings come from oversized embedded images — where there are none, there is little to reclaim.

Your PDF was probably already optimized — for instance exported by Acrobat with compression enabled, or generated as pure text with subset fonts. When we cannot beat the original we deliberately return your untouched file rather than a worse one.

It is gone from the page entirely. The document is held only in the tab's volatile memory during processing and is discarded when the tab closes. Nothing is written to browser storage, no cookie records it, and no copy exists anywhere else — your original stays untouched on disk.

Yes. Bookmarks, the table of contents, internal cross-references, hyperlink annotations and interactive form fields all survive compression. Only the encoding of images and content streams is altered — the document's structural and navigational layers are preserved.

Text always stays sharp because it remains real vector text rather than an image. Embedded photographs are downsampled and re-encoded, so quality loss scales with how aggressive a preset you choose. Less Compression is visually near-identical to the original.

Not while it is encrypted. A protected PDF has its content streams encrypted, so the compressor cannot read the images it needs to optimize. Remove the password in your PDF reader first, compress, then re-apply protection to the smaller output if you still need it.

Nothing persists. The compressed result lives in your browser tab's memory until you download it, and everything is discarded the moment you close or refresh the page. There is no server-side copy because the file was never sent anywhere.