Add a background colour to a PDF

Add a background colour to every page of your PDF. Pick a colour and download the result. Text remains fully selectable. Free and local in your browser.

Choose your PDF

Drop here or click to choose

Files stay on your device — nothing is uploaded

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Your file is processed in your browser and never uploaded.

How does it work?

1
Choose your PDF
Drag the PDF here.
2
Pick a colour
Click a preset or choose any colour with the colour picker.
3
Apply & download
Download the PDF with the background colour on every page.

Frequently asked questions

Does the text stay selectable?

Yes. The background is placed as a separate layer behind the existing content. Text, images and links remain untouched.

Does this apply to all pages?

Yes, the colour is applied to every page of the PDF.

Can I pick a custom colour?

Yes, besides the seven presets you can choose any colour via the colour picker or the hex input field.

Are my files uploaded?

No. Everything happens in your own browser. Your file never leaves your device and is not stored anywhere.

Is it free?

Yes, completely free, without watermark or account. The site is paid for by ads.

Why in the browser?

PDFrust runs entirely in your browser using WebAssembly and modern JavaScript libraries such as pdf-lib and PDF.js. Your file is never sent to a server — all processing happens locally on your device. This means your documents remain private by design, regardless of what they contain. There is no account required, no file size limit, and nothing is stored after you close the tab.