Compress PDF

PDF files often contain hidden metadata that inflates their size — document titles, author names, creation dates, editing history, and keyword tags embedded by the software that created them. This tool strips that metadata to produce a leaner file. It is particularly effective on PDFs generated by word processors and design tools that embed verbose metadata by default.

It is worth being honest about what browser-based compression can and cannot do. Server-side tools can recompress embedded images, downsample high-resolution graphics, and subset fonts to achieve dramatic size reductions. This tool takes a different approach: it removes metadata while leaving all visual content untouched. That means your text, images, and graphics remain at full quality. The trade-off is that files whose size comes mainly from large embedded images will see smaller reductions than files bloated by metadata.

This makes the tool ideal for situations where you need a modest size reduction without any quality loss — for example, getting a file under an email attachment limit, meeting an upload size restriction on a web form, or trimming files before archiving. Because everything runs in your browser using pdf-lib, your documents stay private and never touch a remote server.