Make a PDF easier on the eyes — inverted for dark mode, greyscale for printing, or sepia for long reading.
Use Invert PDF Colours (interactive) — JavaScript required for uploads.
Invert flips light and dark, giving white text on black. Greyscale removes colour, which is useful before printing. Sepia warms the page for extended reading.
Colours live inside the page content, so recolouring means rendering each page to an image and rebuilding the PDF from it. The result is no longer selectable or searchable, and the file will usually be larger. Keep your original.
Yes, completely free and with no account.
No. The output is images. Extract the text first if you need it.
Vector text compresses far better than page images. That is the cost of recolouring.
This tool works entirely on this page. Your file is opened by JavaScript here, changed in memory, and handed straight back to you — it is never uploaded. Open your browser's Network tab while you use it and you will see nothing leave your device.
Because there is no server doing the work, there is no signup, no watermark, no file size limit, and no daily cap. Nothing is stored, because nothing is received.
Browse all free PDF tools, or read how we handle privacy and security.