Your files stay on your device

# Device tests

Check your webcam, microphone, speakers, keyboard, and screen before a call or after a repair. The browser asks for permission only when you press a test button.

19 tools

## Quick checks

- [Webcam test

See your camera picture, check its resolution, and switch cameras.
](/device/webcam)
- [Microphone test

Speak and watch the level meter move. Nothing is recorded.
](/device/microphone)
- [Speaker test

Play a tone in the left, right, or both speakers to check they work.
](/device/speakers)
- [Keyboard test

Press any key and see it light up, so you know which keys work.
](/device/keyboard)
- [Dead pixel test

Fill the screen with solid colors to spot dead or stuck pixels.
](/device/dead-pixel)
- [Screen recorder

Record your screen, a window, or a browser tab and save the video.
](/device/screen-recorder)

## Screen and input

- [Refresh rate test

Measure how many times a second your screen refreshes.
](/device/refresh-rate)
- [Touch test

Touch the screen with one or more fingers to check that touch works everywhere.
](/device/touch)
- [Gamepad test

Press buttons and move the sticks to check a game controller.
](/device/gamepad)
- [Motion and orientation

See live readings from your phone's motion and tilt sensors.
](/device/motion)
- [Vibration test

Check whether your phone can vibrate from a web page.
](/device/vibration)
- [MIDI monitor

Connect a MIDI keyboard or controller and watch the notes come in.
](/device/midi)

## Browser features

- [Battery test

See your battery level and whether it is charging.
](/device/battery)
- [Storage inspector

See what this site has saved in your browser.
](/device/storage)
- [Permissions viewer

See which permissions this site has, like camera or location.
](/device/permissions)
- [Notification test

Check that browser notifications reach you.
](/device/notifications)
- [Clipboard write test

Check that copying to the clipboard works in this browser.
](/device/clipboard)
- [Codec matrix

See which video and audio formats this browser can play and record.
](/device/codec-matrix)
- [WebRTC loopback

Check that video-call connections work in this browser, without a server.
](/device/webrtc)

Your files are processed on your device. The few tools that talk to the internet say so before they do.

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Canonical HTML: https://nutter.tools/device/
Markdown version: https://nutter.tools/device/index.md
Plain-text version: https://nutter.tools/device/index.txt
Agent index: https://nutter.tools/llms.txt