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Professional Screen Testing Tools - Test Your Monitor Free | ScreenTest

Professional Screen Testing Tools

Test your monitor, laptop, or phone for dead pixels, backlight bleeding, and display defects. Free, instant, and trusted by 1,000,000+ users monthly.

White Screen
LIVE DEMO

👆 See Our Tools in Action

Click to start white screen test

⬜ White ⬛ Black 🔴 Red 🟢 Green 🔵 Blue View All 25 Tools →
⚡ Instant & Free
🔒 No Signup Required
👥 1M+ Monthly Users
⭐ 4.8/5 Rating

Complete Screen Testing Suite

Choose the perfect test for your display. All tools are free and work instantly.

🎨 Basic Color Tests

⬜

White Screen

Find dead pixels and black dots

⬛

Black Screen

Detect backlight bleeding

🔴

Red Screen

Test red pixel channel

🟢

Green Screen

Test green pixel channel

🔵

Blue Screen

Test blue pixel channel

◻️

Gray Screen

Check for banding issues

🔬 Professional Tests

📊

Gradient Test

Detect color banding

⊞

Grid Pattern

Check geometry accuracy

💡

Backlight Bleed

Test for edge bleeding

🎯

Response Time

Check for ghosting

Why 1M+ Users Choose ScreenTest

Professional-grade testing tools accessible to everyone

⚡

Instant Testing

No downloads, no installation. Start testing in seconds right from your browser.

💯

100% Free

All tools completely free forever. No hidden costs, no subscriptions, no signup required.

📱

Works Everywhere

Test monitors, laptops, tablets, phones. Any device, any browser, any screen size.

🎓

Expert Guides

Comprehensive guides on how to test, what to look for, and what results mean.