Lie detector game — prank scanner for friends

A free online lie-detector-style game. Press your finger on the scanner — it theatrically "scans" and returns "truth" or "lie" (random, or whatever the host set). Switch on the voice nervousness meter to see who sounds tense, and draw cheeky party questions for your friends. It is a prank and a bit of fun, not a real polygraph.

How to play

1
Pick a mode

Prank scanner, voice nervousness meter or party questions — switch with the tabs at the top.

2
Hold the scanner

Press and hold the circle while it "scans". At the end you get "truth" or "lie".

3
Play along as host

In "Host secret" you can pre-set the answer or hint it by touching an edge of the circle.

4
Save and share

Make an image of the verdict or draw a fresh party question.

Prank your friends with a playful scanner and see who gets nervous

This is a game, not a real lie detector. The "scanner" shows a random (or host-chosen) answer, and the meter reacts to nervousness in your voice, not to the truth. For fun only.
Press and hold your finger
🤫 Host secret

Want a specific answer to come up? Set it in advance — your guests will not notice.

Next result:

Trick for playing in person: while it scans, quietly touch the left edge of the circle for "Lie", the right edge for "Truth". A finger in the centre gives a random answer.

Features

Prank scanner
Hold your finger, watch the scan animation and get a "truth" or "lie". The host can quietly pre-set the answer.
Voice nervousness meter
The microphone tracks loudness and voice tremor and shows a 0–100% gauge. It is an indicator of how the voice sounds, not a lie detector.
Party questions
A deck of cheeky questions for friends, couples and kids, plus simple rules for the "two truths and a lie" game.
Shareable result image
Save the scanner verdict as an image to send to friends in chats and social apps.
Sound and animation
A scanning line, glow and a buzzer build the atmosphere of a real "interrogation" — all for laughs.
Runs in your browser in 9 languages
Nothing to install — open the page and play. Full interface translation, including right-to-left Arabic.

Questions and answers

Is this a real lie detector?

No, it is a prank game. The scanner shows a random or pre-set answer, and the meter reacts to loudness and voice tremor, not to the truth. A real polygraph does not work this way.

How do I "rig" a specific answer?

Open "Host secret" and choose "Truth" or "Lie" — the next result will match. Or, in person, touch the left edge of the circle for "Lie" and the right edge for "Truth".

What does the nervousness meter show?

It analyses your voice from the microphone — loudness and pitch instability — and turns that into a 0–100% gauge. A high value means the voice sounds tense, but it is not proof of lying.

Do I need a microphone or camera?

No. The scanner and the questions work with no permissions. The microphone is only needed for the nervousness meter and is enabled on request.

Is it suitable for kids?

Yes. There is a separate set of simple, harmless questions, and the scanner itself is a fun animation with no real "verdict".

Can I share the result?

Yes. After a scan, tap "Save image" to get a picture of the verdict that is easy to send to friends.

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Who is this tool for?
📡 Streamers & Broadcasters ✨ Content Creators 🎮 Gamers
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