Free tools that work the moment the page loads
Find the note you're singing, test your speakers and headphones, and measure how loud it is. No sign-up, no install, and nothing you record leaves your device.
- Works on phone and computer
- No account
- Nothing leaves your device
Audio tools
Find notes, tune instruments, test speakers and microphones, measure noise and play tones.
Pitch detector
Sing or play a note and see what it is, its frequency in Hz and how many cents off you are.
Uses your microphoneGuitar tuner
Tune each string with your microphone, in standard tuning, Drop D or an open tuning.
Uses your microphoneSpeaker test
Check left and right with a quick check, then sweep the frequencies and test the bass.
Plays soundHeadphone test
Check that left and right are correct and that both sides sound the same.
Plays soundSound test
Play a test sound to check that your audio works, then find the cause if it does not.
Plays soundMic test
See your microphone level live, record a few seconds and play them back on your device.
Uses your microphoneDecibel meter
Measure how loud it is around you in dB, with peak hold and a safe listening time.
Uses your microphoneTone generator
Play any frequency from 1 Hz to 22 kHz, sweep the range or check how high you can hear.
Plays soundBPM tapper
Tap along with a song to find its tempo, then play it back with the metronome.
Tap along
Display tests
Check a monitor, laptop, phone or TV screen for dead pixels, backlight bleed and burn-in.
Dead pixel test
Fill your screen with plain colors to find dead or stuck pixels.
Fills your screenBacklight bleed test
Show a pure black screen in a dark room to see light leaking from the edges.
Fills your screenScreen burn-in test
Show plain colors and gray to find burned-in images on OLED and plasma screens.
Fills your screenMonitor test
Check colors, gradients, sharpness and uniformity of your monitor with test patterns.
Fills your screen
Device tests
Check your camera, game controller and mouse in the browser, with nothing to install.
Camera test
Check your webcam or phone camera: picture, resolution, frame rate, zoom and lenses.
Uses your cameraStick drift test
See if your controller's sticks drift, with a live view of each stick and a drift reading.
Uses a game controllerMouse button test
Press every mouse button and the wheel to check that each one works, and catch double clicks.
Uses your mouseMouse polling rate test
Move your mouse to measure how many times a second it reports to your computer, in Hz.
Uses your mouse
How the tools work
The work happens in your browser, so the tools start fast and your sound stays with you. No sign-up, no ads, nothing uploaded.
Your microphone
Sound comes in only after you tap Start.
Your browser
The Web Audio API works out the note or the level, on your device.
The reading
It shows on screen. Nothing is recorded, sent or stored.
Who builds them
Gizmetto is made and maintained by Nabeel, a web developer who wanted audio tools that open instantly, work on a phone and respect your privacy.