All Device Testing Tools
Find a focused browser test by device, symptom, or capability. Every result explains what is measured and what is only estimated.
Microphone Test
See and hear whether your browser is receiving a useful microphone signal.
Voice Recorder
Record, review, and download audio locally without creating an account.
Speaker Test
Confirm audible output and verify left, right, and center channel routing.
Headphone Test
Check headphone channels, center image, basic phase, and low-frequency playback.
Tone Generator
Generate controlled waveforms from 20 Hz to 20 kHz at a safe starting level.
Hearing Frequency Test
Explore your approximate subjective audible range at a conservative level.
Webcam Test
Preview your camera and inspect the stream settings reported by the browser.
Pre-call Device Check
Walk through browser, microphone, webcam, and speaker checks before a call.
Keyboard Test
See keydown and keyup events, pressed keys, locations, and tested codes.
NKRO Keyboard Test
Observe simultaneous keys and the maximum combination your browser receives.
Keyboard Chatter Test
Look for unusually close repeated keydown events while excluding held-key repeats.
Keyboard Latency Test
Estimate time from a browser key event to the next painted visual update.
Typing Speed Test
Measure English typing speed, raw speed, accuracy, and error characters.
Mouse Test
Inspect primary, middle, and side buttons, wheel input, coordinates, and motion.
Mouse Double Click Test
Review click intervals and possible unexpectedly close repeat clicks.
Mouse Polling Rate Test
Estimate the pointer event rate currently delivered to this browser tab.
Mouse DPI Calculator
Estimate mouse DPI from on-screen pixels and a measured physical movement.
CPS Test
Measure clicks per second over a fixed one to sixty second session.
Reaction Time Test
Measure visual response timing over five randomized browser rounds.
Dead Pixel Test
Inspect the screen manually with borderless full-screen solid colors.
Refresh Rate Test
Estimate the browser window refresh rate and frame-time variation.
Motion Blur Test
Observe subjective motion clarity with an original adjustable moving target.
Screen Color Test
Inspect gradients, gray steps, levels, RGB blocks, and a basic gamma pattern.
Screen Resolution & PPI Calculator
View browser-reported screen values and estimate PPI from physical size.
Gamepad Test
Inspect connected controller buttons, triggers, axes, and browser mappings.
Stick Drift Test
Estimate controller center offset, stationary noise, range, and deadzone.
Gamepad Vibration Test
Check whether the browser exposes safe short controller vibration effects.
Multi-touch Test
Observe simultaneous touch points, regions, and short local traces.
Browser Device Diagnostics
Check browser capabilities and permission states without opening devices.
WebRTC Test
Inspect local WebRTC API and ICE gathering behavior with explicit consent.
Internet Speed Test
Understand what a reliable download, upload, ping, and jitter test requires.