DEVICE TEST TOOLKIT
Every check, clearly explained.
Run focused display, input and network checks. Every tool explains what it measures—and what the browser cannot prove.
Pixels, color, motion and browser-reported screen settings.
Dead pixels
Scan for stuck, dark or fixed-color pixels with exact fullscreen colors.
Backlight bleed
Inspect LCD edge bleed, clouding and angle-dependent IPS glow.
Burn-in
Reveal possible OLED burn-in or temporary image retention across colors and grey fields.
Greyscale
Inspect shadow detail, highlights, neutrality and grey uniformity.
Gradients
Check smooth tonal transitions in greyscale and RGB gradients.
Contrast
Compare near-black and near-white steps for clipping and crushed detail.
Refresh rate
Estimate the browser animation rate and inspect frame-time stability.
Ghosting
Compare trailing, smearing and motion blur using a crisp Canvas target.
Resolution
See CSS screen size, viewport, DPR, color depth and estimated device pixels.
Color vision
Try ten original color-pattern puzzles designed for casual color distinction practice.
Practice reaction time, typing pace and physical input events locally.
Measure throughput and responsiveness to the AnHot edge node.
Inspect a public site's status, detectable technology stack and essential SEO settings.