Sing anything. Your friend hears it backwards and tries to copy it. Reverse it back — how close did they get? Or practise solo with your own voice.
Record
Your line
Sing a short line — you’ll hear it backwards, then copy it.
Record
Your copy
Record your line first.
Your score shows here.
How the reverse singing challenge works
Reverse singing is the game where you try to sing something backwards so well that, when your recording is reversed, it sounds like the real words. It’s hard, it sounds ridiculous, and it’s a party and social-video favourite. This page does the audio work for you: it records, reverses and scores each round in your browser, with nothing to install.
For example: Player 1 sings “happy birthday to you”. Player 2 hears something like “oo-yuh-oot yad-thrib ee-pah” and copies it as closely as they can. Their copy is flipped the right way round and compared with the original — the closer it sounds, the higher the score.
How to play reverse singing
Each round takes about a minute:
Choose “Play with a friend” (one device, passed between two players) or “Practise solo”.
Record a short line — up to 8 seconds. Listen back and re-record if you like.
The next player (or you, in solo mode) hears only the reversed version and can replay it as often as needed.
Record an imitation of the reversed sound.
The imitation is reversed back and scored against the original. Play all three clips, download them, or play another round.
What you can do
Two ways to play. Pass-and-play with a friend, where the second player never hears the original, or solo practice with your own voice.
An explained score. Every round shows a 0–100 score with separate tone, timing and length values, so you know what to improve.
A running scoreboard. Scores from each round are listed with your best and average, and a new best is called out.
Downloadable clips. Save the original, the reversed clue and the recovered copy as WAV files for a reaction video or to share.
Private by design. Recordings are processed in the browser and are never uploaded; reloading the page discards them.
Where people play it
Parties and family nights. One phone, a few friends, lots of noise — no setup.
Challenge videos. Download the reversed clue and the recovered result to cut into a video.
Singing and ear practice. Solo mode is a surprisingly good exercise in listening to vowel sounds and rhythm.
Classroom icebreakers. A quick game that works on a single laptop with a microphone.
Tips for a higher score
Keep the original short — three to six words — and sing it clearly.
Replay the reversed clue several times and copy its vowels, not the words you think it hides.
Match the length: rushing or dragging the imitation lowers the timing and length scores.
Record in a quiet room and hold the device the same distance away for both recordings.
Troubleshooting
“Microphone is blocked”. Your browser remembered a denial. Allow the microphone from the icon in the address bar, then tap Try again.
“Microphone unavailable”. No microphone was found, or the page isn’t allowed to use one here (for example, inside some in-app browsers). Open it in a regular browser.
A score of 0 with “Too short”. One of the recordings was mostly silence. Record again a little closer to the microphone.
No sound on iPhone. Check that silent mode is off and the volume is up.
Frequently asked questions
What is the reverse singing challenge?+
One person sings or says a short line. It is played backwards, and the other person has to copy that backwards sound. Their copy is then reversed again — if they imitated it well, the result sounds like the original line. This page records, reverses and scores all of it for you.
How is the score calculated?+
Both clips are trimmed of silence and compared in the browser: tone (the shape of the sound’s frequencies, 50%), timing (how the loudness rises and falls, 35%) and length (15%). A gentle curve rewards decent attempts, and the breakdown is shown with every score.
Can I play reverse singing alone?+
Yes. Choose “Practise solo”: sing a line, listen to your own voice reversed, sing the reversal back, and see how close the un-reversed copy gets to your original.
Do I need an app or an account?+
No. It runs in a modern browser on a phone, tablet or computer. You only need to allow microphone access.
Are my recordings uploaded?+
No. Recording, reversing and scoring happen in your browser. Clips stay in memory until you leave or reload the page, unless you download them.
Can I save the reversed audio for a video?+
Yes. “Save audio” downloads any clip of the round as a WAV file, one file per clip: the original, the reversed clue and the recovered copy.
How long can a recording be?+
Up to 8 seconds per recording. Short phrases of three to six words work best.
Why is my microphone not working?+
Allow microphone access when the browser asks, or re-enable it from the icon in the address bar, then tap “Try again”. Some in-app browsers (inside social apps) don’t allow microphone access — open the page in Chrome, Safari, Edge or Firefox instead.