About DeviceChecker
Fast, completely private, and genuinely honest hardware diagnostics right in your browser.
Why DeviceChecker Exists
Every day, millions of people jump on Zoom, Google Meet, Microsoft Teams, or Discord and encounter the same frustrating question: “Why isn’t my camera turning on? Why can’t anyone hear me?”
Historically, testing your computer hardware meant either digging through multi-level operating system settings, downloading shady driver utilities, or visiting bloated websites plastered with intrusive popups, cookie walls, and forced software installers.
DeviceChecker was built to provide a clean, instantaneous, modern alternative. Open the URL, click one button, and verify your webcam, microphone, speakers, or keyboard in seconds — with zero software to download, zero accounts to create, and zero tracking.
The Honesty Principle: Real Diagnostics, Never Faked
The internet is flooded with diagnostic sites that flash arbitrary green checkmarks and claim your hardware is “100% Passed” simply because an API stream opened.
DeviceChecker refuses to fake results. If a browser API cannot physically verify something with certainty, our tools state that limit honestly and invite human confirmation:
Webcam Optical Verification
A browser stream can confirm resolution and active frames, but it cannot know if your lens is smudged or blocked. We show you the live viewfinder and ask you to confirm clarity.
Acoustic Voice Energy
We don’t just detect an open microphone channel — we calculate real-time acoustic RMS energy to confirm your mic actually picks up audible sound.
Stereo Channel Separation
Rather than generic noise, we test left and right channels individually with safe tones to diagnose single-earbud or balance issues.
True Keyboard Ground Truth
An unpressed key is fundamentally ambiguous (unpressed vs. broken). We never pretend to know a key is broken until you interact with it.
Independent & Privacy-First
DeviceChecker is an independently created, privacy-first technical utility. All diagnostics run 100% client-side inside your browser sandbox. None of your video, audio, or keystroke data is ever uploaded, saved, or shared with third parties.
Explore Available Diagnostics
Select a hardware test to get started immediately:
Camera Test
Verify your webcam video feed, picture clarity, and hardware resolution instantly.
Microphone Test
Check your microphone volume levels, real-time audio detection, and sample rate.
Speaker Test
Verify stereo audio output, left and right channels, and headphone clarity.
Keyboard Test
Test every physical key, switch, and modifier with real-time visual matrix feedback.
Mouse Test
Check your mouse buttons, scroll wheel, double-click, and cursor movement online.