Why These Run in the Browser
Every tool on this page works the same way: the page loads, and the work happens on your own device. No file you drop in is uploaded, no recording is transmitted, and no account is required. That is not a privacy promise we are asking you to take on trust — it is a consequence of how the tools are built. Open your browser's network inspector while you use one and you will see nothing leave the machine.
It also means they work anywhere. A dead-pixel check or a screen test does not care whether you are running a beta, a five-year-old release or someone else's phone in a shop; there is nothing to install and nothing to be compatible with. That matters most in exactly the situation these tools exist for — a device behaving strangely on a pre-release build, where installing more software is the last thing you want to do.
Most of these were built because the same questions kept coming up alongside beta problems. Is the screen flickering because of the beta or because the panel is failing? Is the touch digitiser dropping input, or is it a software bug that a later build will fix? Is the speaker distorting, or is the audio file? A tool that isolates the hardware answers those in seconds, and turns "my phone is broken" into something specific enough to act on.
Display & Screen
Hardware
Photos & Files
Every tool runs entirely in your browser. Nothing is installed, and nothing you test ever leaves your device. If a test points at a software fault rather than hardware, the beta troubleshooting guides cover what to do next.