Is WCAG Contrast Checker (Batch) free to use?

Yes, WCAG Contrast Checker (Batch) is completely free. No account, no sign-up, and no hidden fees required.

Is my data safe when using WCAG Contrast Checker (Batch)?

Your data never leaves your device. All processing happens locally in your browser — nothing is uploaded to any server.

Accessibility Tools

Test multiple color pairs against WCAG AA/AAA contrast requirements at once — get a pass/fail matrix for your entire palette

ได้รับความไว้วางใจจากนักพัฒนา 10,000+ คน

AA normal

1/5

20% pass · ≥ 4.5:1

AA large

4/5

80% pass · ≥ 3:1

AAA normal

1/5

20% pass · ≥ 7:1

AAA large

1/5

20% pass · ≥ 4.5:1

Color Pairs (5)

WCAG 2.1 thresholds: AA Normal ≥ 4.5:1, AA Large ≥ 3:1 (text ≥ 18pt or 14pt bold), AAA Normal ≥ 7:1, AAA Large ≥ 4.5:1.

All calculations run in your browser. Export a CSV report for your design system audit.

See how your images and colors appear to people with different types of color blindness (protanopia, deuteranopia, tritanopia, achromatopsia)

Preview how your HTML will be announced by screen readers — see the accessible name, role, and reading order for each element

Visualize the keyboard tab order of any HTML — see exactly where focus lands and spot accessibility issues with tabindex and hidden elements

เราสร้างเครื่องมือฟรีจากข้อเสนอแนะของชุมชน หากมีเครื่องมือที่จะช่วยเวิร์กโฟลว์ของคุณ แนะนำได้เลย!