Invert Colours — free, private, no upload
Turn a PDF into permanent dark mode, sepia or grayscale for comfortable reading and low-ink printing. Private and free.
No upload. No watermark. No sign-up. This invert colours tool runs entirely inside your browser — your file never leaves your device.
How to invert colours
- Open your PDF in the tool above — it loads locally in your browser.
- Pick your options; processing happens on your device with JavaScript.
- Download the result — free, with no watermark added.
More edit & annotate tools
- Add Watermark — Stamp text over or under every page — opacity, angle and position.
- Add Page Numbers — Number pages your way: position, format and starting number.
- Edit Metadata — Rewrite the title, author, subject and keywords inside the file.
- Sign PDF — Draw your signature, click where it goes. Done.
- Edit PDF Text — Find any text in the PDF and replace it.
- Redact PDF — Black out words permanently — with a burn-in option.
← All free local PDF tools
