About Reducer

Reducer does one thing: it makes your PDF and image files smaller, quickly and for free. No account, no watermark, no daily limit, no nagging to upgrade.

Why it's free

Reducer is supported by a couple of unobtrusive ads rather than a subscription. There's no premium tier hiding behind a paywall — every feature on this site is available to everyone. If it's useful to you, a small PayPal donation goes a long way toward keeping it running.

How it works

Images are compressed entirely on your own device using the same WebAssembly codecs (MozJPEG, OxiPNG, WebP, AVIF) that power Google's own Squoosh project — nothing is uploaded. PDFs are compressed on our server using qpdf and Ghostscript, the same tools behind most professional PDF tools. See the privacy page for exactly what's kept and for how long.

Feedback

Found a bug, or a file that doesn't compress the way you'd expect? Let us know.