How do I use Invert PDF Colours?

Select a PDF. Click Invert. Each page is rendered and inverted. Preview finishes in the browser. Download the inverted document.

Is Invert PDF Colours free and watermark-free?

Yes. Invert PDF Colours is free to run and does not stamp a watermark. After a download we may ask for a small tip in rupees. Skip is always there.

Dark-mode a PDF by inverting page pixels after a local render. Runs in this browser tab. Files never leave the device.