PDFMaxChange PDF Colors Online
Need to change the colors in a PDF? With this free tool you can invert the colors of a whole document to create a dark-mode, white-on-black version that is easier on the eyes at night, or swap one color for another throughout the file. It works straight in your browser, so there is nothing to download and no account to create. Text stays sharp and your pages keep their original layout. Drag in a PDF, pick invert or replace, preview the result, and download the recolored file in seconds, on your phone or your computer.
Change PDF Colors →100% freeNo signupWorks in your browser
Why PDFMax
- Invert all colors for a dark-mode, white-on-black PDF that is easier to read at night and saves battery on OLED screens
- Replace a specific color across the whole document without redoing the layout
- Completely free with no signup, no install and no watermark on the result
- Runs in your browser on mobile and desktop — quality stays the same and text remains crisp
How to change PDF colors
- Upload your PDFDrag your PDF onto the page or click to choose a file from your device. Nothing is installed.
- Choose invert or replacePick Invert to flip every color for a dark-mode look, or Replace to swap one color for another across the file.
- Preview the resultCheck the recolored pages in the preview to make sure the new colors look right.
- Download the fileSave the updated PDF to your phone or computer. Your colors are baked in and ready to read or share.
Frequently asked questions
Is it free to change PDF colors?
Yes. The tool is completely free with no signup and no watermark. You can invert or replace colors in as many PDFs as you need.
Is it safe and private?
Yes. The work happens in your browser, so your PDF is not uploaded to a server. Your document stays on your device and private to you.
Does inverting colors lower the quality?
No. Recoloring is just a color change, so text stays sharp and your pages keep their original layout and resolution.
Can I use it on my phone?
Yes. It works in any modern browser on phones, tablets and computers — no app to install.
What is the difference between invert and replace?
Invert flips every color in the document, which is great for a dark-mode, white-on-black look. Replace swaps one specific color for another across the file.
Will the new colors stay in the file?
Yes. The color change is saved into the downloaded PDF, so it looks the same in any reader or device, not just here.