---
title: "Adjust PDF colors online | Docs Bunny"
description: "Improve PDF readability by adjusting brightness, contrast and saturation locally in your browser."
canonical: https://docsbunny.com/adjust-pdf-colors
---

# Adjust PDF colors online

Improve PDF readability by adjusting brightness, contrast and saturation locally in your browser.

- Input: PDF
- Output: Color-corrected PDF
- Browser tool: [Open Adjust PDF colors online](https://docsbunny.com/adjust-pdf-colors)
- Privacy: Supported processing runs locally after the person selects a file.

## Correct PDF brightness and contrast in three steps

Docs Bunny processes PDF pages locally to adjust brightness, boost contrast, and fix faded scans without cloud uploads.

## Steps

1. **Add your PDF** — Select the document or scan you want to enhance.
2. **Adjust brightness and contrast** — Use presets like Enhance scan or High contrast, or fine-tune sliders.
3. **Download enhanced PDF** — Export a clear, legible PDF with corrected colors and contrast.

## Common questions

### Can this fix faint or dark scanned documents?

Yes. The Enhance scan and High contrast presets brighten dark backgrounds and darken faint text.

### Is my PDF uploaded anywhere?

No. Page rendering and color correction execute completely inside your browser.