What is High Contrast Mode?

Test how your web content looks under different high contrast settings. Paste HTML or a URL screenshot to preview WCAG-compliant contrast modes, including Windows High Contrast, inverted colors, and custom contrast themes.

How to use

1. Step 1 — Paste your HTML content or plain text into the editor area to use as the preview source.
2. Step 2 — Select a contrast mode from the presets: Windows High Contrast (black/white), Inverted, Yellow on Black, or custom colors.
3. Step 3 — Review the live preview to check readability. Use the contrast ratio checker to verify WCAG AA/AAA compliance for text elements.

Result

A developer pastes their navigation bar HTML and switches to Windows High Contrast mode. They spot that their icon-only buttons become invisible against the black background, prompting them to add visible text labels.

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