How does the background change work?

A full-page fill in your chosen color is drawn, then your original page is blended on top so white and light areas pick up that color while dark text and lines stay readable.

Will photos and colored graphics look the same?

Multiply blending shifts colors on non-white areas too. This tool works best on typical documents (white paper, dark text). For image-heavy PDFs, preview and use Adjust colors if needed.

Is it free and private?

Yes—everything runs in your browser with no upload.

Background Color Online Free

Change the background color of a PDF. All processing happens in your browser. No uploads, no signup—your files never leave your device.

Pick a background color, then apply it to your PDF. White and light areas blend toward that color; dark text stays readable. Processing stays in your browser.

Drop your PDFs here, or click to choose files

Your files never leave your device. All processing happens in your browser.

How to use

Upload PDF

Select one PDF. Your file never leaves your device.

Choose color

Use the color picker for the new page background (default is a light cream, like the reference tool).

Apply & download

Click Change background color, then download the updated PDF.

Frequently asked questions

Change Text Color
Modify the color of text in a PDF.
Adjust Colors
Adjust brightness, contrast and saturation.
PDF Editor
Annotate, highlight and edit PDF documents.