Compress a PDF

Re-renders each page as an image at the resolution and quality you pick. Best for scans and photo-heavy documents; the result is lighter but its text is no longer selectable.

Before you upload anything — you will not have to

Why does my text document get bigger?
Because this rasterises. A text PDF is already a compact set of drawing instructions; turning each page into a picture of itself usually costs more than it saves. The tool shows both sizes so you can tell before keeping the result.
Will the text still be searchable?
No. Re-rendering replaces the text layer with pixels. If searchable text matters, compress only the scans, or keep the original.
What settings should I use?
150 dpi at 60% quality is a reasonable scan; drop to 110 dpi for something meant to be read on screen. Try one and look at the two sizes before deciding.

Other tools that keep your file where it is