Truth Detector 3000

Tap start and allow the mic. Then just talk like a normal conversation.

For entertainment only, not a real lie detector. Your voice is analyzed in your browser and never recorded or uploaded by this page. (If you use keyword phrases, Chrome, Edge and Safari may send speech to their own speech-recognition service.)

How to play

Tap Start and allow the microphone.
Just start talking like normal. It learns your voice as you go.
Keep chatting. Each time you pause, it gives a verdict.
Watch the needle: green = true, red = lying. A huge lie sets off the alarm!

Tip: use a quiet room and a normal speaking voice.

🤫 Prank settings

Play a cheerful "ding-ding" on TRUE Prank style Sensitivity: Always say TRUE when they say… (one phrase per line) Always say FALSE when they say… Always say LIAR when they say… Replace the LIAR sound (optional; default is the air horn + "LIAR!!" clip) Spoken line if the sound can't play

Secret keys while the game runs: T = next answer TRUE, F = FALSE, L = LIAR.

Back up your settings

✔ Changes save automatically. Press ✕ to close.