Compress a PDF and reduce its file size
Most oversized PDFs are oversized because of their images. This tool recompresses them at a quality you choose while leaving text and vectors sharp, and shows you what you saved before you keep it. If you need a much smaller file and don't need selectable text, a rasterise mode goes further. Both run in your browser, so the document is never uploaded to be shrunk.
How to compress a PDF
Drop in the PDF
Add your file and its current size is shown.
Choose a compression level
Pick a quality setting for the embedded images, or switch to rasterise mode for the biggest reduction.
Compare and save
Press Compress. You'll see the new size next to the old one before you download.
What Compress PDF can do
Text stays sharp
Images are recompressed; text and vector graphics are left alone.
Before and after
The saving is shown up front, so you can back out if it's not worth it.
Rasterise for maximum savings
For scans and image-heavy decks where selectable text isn't the point.
No upload
The file is compressed in the tab — the usual privacy trade of online compressors doesn't apply.
Compress PDF — frequently asked questions
How do I get a PDF under a specific size, like 5 MB?
Start at the medium quality setting and check the reported result. If it's still too big, step the quality down or switch to rasterise mode — the before-and-after figure updates each time you re-run it.
Why didn't my PDF get much smaller?
Because it was mostly text. Text and vector graphics are already tiny; compression works on embedded images, so a text-only report has very little to give up.
Does compressing a PDF lose quality?
Image quality, yes — that's the trade. At the higher settings the difference is invisible on screen. Text and vectors are untouched unless you choose rasterise mode.
Do my PDFs get uploaded to a server?
No. Every tool on Notoo Tools runs as JavaScript and WebAssembly inside your browser tab. There is no server that receives your files — you can disconnect from the network after the page loads and the tool keeps working.
Do I need an account or a subscription?
Neither. There's no sign-up, no email, no free-tier limit and no watermark. Bookmark the tool and it opens straight into the work.