Private browser karaoke and singing practice

See your voice. Take the stage.

Meet your voice in 60 seconds, then turn a song you own into karaoke with synced lyrics and live pitch scoring. Nothing to install. No account to start.

Open Karaoke Night → Mirror your voice — 60 seconds

Pitch analysis stays on your device
Real pitch feedback, not a generated result
Free and open source

Real Karaoke Night UI · scene preview Your song becomes the stage. Vocals down, lyrics in time, every note visible.

See how a song becomes your stage

Every room

Whatever you play, there is a room for it.

MercuryPitch started with singers and did not stay there. Pianists, guitarists and drummers get rooms of their own — the same live listening, the same instant feedback, tuned to the instrument in your hands. Every room is free, in the browser, and they all open into the same studio.

Singers

Karaoke Night

Bring a song you own. The vocals lift away and you sing to synced lyrics with live pitch scoring.

See the room Open in studio

Any voice

Voice Mirror

Sing one note and watch your range draw itself. No account, no setup — the fastest way in.

See the room Open in studio

Everyone at once

Jam Rooms

Open a room, share the link, and play together from anywhere. One song, one scoreboard, a lane each.

See the room Open in studio

Pianists

Piano Night

A room built around the keyboard — practise a passage, shape the phrasing, and hear every note land.

See the room Open in studio

Guitarists

Guitar Night

Learn a part, drill the hard bar, and play it through — with the fretboard and the timing in front of you.

See the room Open in studio

Drummers

Drum Night

The room for time and feel. In the works — the rest of the band got here first.

See the room In the works

Karaoke Night

A song you own becomes a stage that can hear you.

Vocals lift away on your device. Lyrics follow the song. Your microphone draws every note in real time—so a fun first take can become a better second one.

Choose the stage

Core Stage Golden Hour Aurora

1 of 3

The real MercuryPitch Karaoke Night interface over its classic theatre stage — Real Karaoke Night UI · included Core Stage Select image to view full-screen

The real MercuryPitch Karaoke Night interface over the Golden Hour Grand Stage supporter environment — Real Karaoke Night UI · included Core Stage Select image to view full-screen

Core stage

The song is already waiting.

Open Karaoke Night and the licensed opener is cued. One click brings in synchronized lyrics, a live pitch lane, and the score that makes the next take worth trying.

No account is required for the prepared song. Bring a song you own when you are ready.

Sing on Karaoke Night →

The Voice Mirror

Meet your voiceprint.

Sing three short tasks — a glide, a hold, a match. Sixty seconds later you're looking at your voiceprint: your range as the headline, your accuracy in cents, your steadiness as a star-map card you can share.

Mic check first Works on iPhone Saved on-device

Mirror your voice — 60 seconds, free →

Come back later and the Mirror shows how your range changed. Example: “+2 semitones since last time.”

Explore all 31 voice legends See the six broad singing neighborhoods behind the playful twin reveal.

Caricature of Freddie Mercury, fist raised, wreathed in ribbons of liquid mercury against a starfield — Illustrative result — your real voiceprint is created from your own singing and saved on your device.

Jam Rooms

One room. One song. Every voice gets a lane.

Bring up to 12 singers into a shared karaoke room. The host guides the song, assigns lines, and sets the scene; everyone follows the same lyrics and sees their own live pitch.

The real MercuryPitch Jam Karaoke interface with shared lyrics, singer assignments, and live pitch lanes — Real Jam Karaoke UI · scene preview Preview peers, pitch targets, lyric text, and assignments use synthetic fixtures; microphone input is a local fake device. The interface is the product.

Room editions

Set the room. Share the atmosphere.

A supporter host chooses the scene; every guest gets the same view.

Live Room · 1 of 6 Drag sideways or swipe to explore

MercuryPitch Live Room jam environment with a softly lit performance stage — **Live Room** Included

MercuryPitch Golden Stage supporter jam environment — **Golden Stage** Supporter preview

MercuryPitch Aurora Loft supporter jam environment — **Aurora Loft** Supporter preview

MercuryPitch Neon Velvet analog salon supporter jam environment — **Neon Velvet** Supporter preview

MercuryPitch Midnight Rain listening room supporter jam environment — **Midnight Rain** Supporter preview

MercuryPitch archival listening studio supporter jam environment — **Mercury Archive** Supporter preview

Support the studio Every scene marked Included is free, with no account. Active supporters unlock the rest as they ship — and a supporter's scene is what everyone in the room sees.

See supporter perks

Piano Night

Every note falls toward the key that plays it.

Open Piano Night and a study is already on the stand. Notes stream down to a full keyboard, the coach frames one phrase at a time, and the room hears whether you landed it — free, in the browser, no account.

The real MercuryPitch Piano Night interface: falling notes over a full keyboard in the Afterglow Studio, with the phrase coach open — Real Piano Night UI · included study The Afterglow Study is bundled with the room. Fall, Score and Keys are three views of the same staged source; the transport and the scoring read it too.

Piano scenes

Set the room. Keep the keyboard.

Six scenes are included. Supporters choose from the rest as they ship.

Afterglow Studio · 1 of 6 Drag sideways or swipe to explore

Blue-hour focus around a concert grand in the MercuryPitch Afterglow Studio — **Afterglow Studio** Included

Warm daylight in the MercuryPitch Morning Conservatory piano room — **Morning Conservatory** Included

The MercuryPitch Nocturne Studio piano room at night — **Nocturne Studio** Included

A book-lined manor library around a grand piano, a MercuryPitch supporter scene — **Manor Library** Supporter preview

A bright Parisian salon with a grand piano, a MercuryPitch supporter scene — **Parisian Salon** Supporter preview

A grand piano under an observatory dome at night, a MercuryPitch supporter scene — **Starlight Observatory** Supporter preview

Support the studio Every scene marked Included is free, with no account. Active supporters unlock the rest as they ship — and a supporter's scene is what everyone in the room sees.

See supporter perks

Guitar Night

A fretboard you can see down, and a room that listens back.

Load a song and the tab becomes a highway: every note travels toward the string and fret that plays it. Tune up first, turn on Listening, and the room tells you what it heard — free, in the browser, no account.

The real MercuryPitch Guitar Night interface: fret numbers travelling down a 3D fretboard highway in the Velvet Rehearsal room, mid-take — Real Guitar Night UI · mid-take Every fret number is where the study actually puts it, ten beats into a take. Highway, Grid, Tab, Neck and Sheet are five views of the same part; the score is a synthetic study, the interface is the product.

Guitar scenes

Set the room. Bring the amp.

Five scenes are included. Supporters choose from the rest as they ship.

Velvet Rehearsal · 1 of 6 Drag sideways or swipe to explore

Amber lamps and a curtained rehearsal space, the MercuryPitch Velvet Rehearsal guitar room — **Velvet Rehearsal** Included

A city rooftop at dusk, the MercuryPitch Blue-hour Roof guitar room — **Blue-hour Roof** Included

Desert rock under a night sky with one amp, the MercuryPitch Midnight Canyon guitar room — **Midnight Canyon** Included

Stacked cabinets in a low, dark club, a MercuryPitch supporter guitar scene — **British Rock** Supporter preview

Sun, salt air and an open garage by the beach, a MercuryPitch supporter guitar scene — **Venice Beach** Supporter preview

A tiled courtyard with a nylon-string guitar, a MercuryPitch supporter guitar scene — **Spanish Courtyard** Supporter preview

Support the studio Every scene marked Included is free, with no account. Active supporters unlock the rest as they ship — and a supporter's scene is what everyone in the room sees.

See supporter perks

Drum Night

The room for time and feel.

Drum Night is being built now, the same way the other rooms were: a real kit in front of you, a groove to play against, and a room that tells you where the hit actually landed. Not open yet — this is the build, mid-take.

The MercuryPitch Drum Night build: hit zones drawn onto a photographed kit, a pocket guide over the cymbals, and a phrase coach reporting timing — Drum Night in development · not shipped Photographed from the branch that is still being finished, so the room is not open and this is not final. Every zone sits on the real kit behind it; the coach is reading a take played badly on purpose — being told you were 53 ms late is the whole point of the room.

Drum scenes

Set the room. Count it in.

Finished art for a room that is still being built.

Tape Room · 1 of 6 Drag sideways or swipe to explore

A drum kit beside a reel-to-reel tape machine in a warm studio — **Tape Room** Coming with the room

A drum booth lit low after hours — **After-hours Booth** Coming with the room

A drum riser in a bright daylit room — **Daylight Riser** Coming with the room

A drum kit on a bronze-lit soundstage, a MercuryPitch supporter scene — **Bronze Soundstage** Supporter preview

A drum kit in a glass-walled studio in the rain, a MercuryPitch supporter scene — **Rain Glass Studio** Supporter preview

A drum kit in an open pavilion at sunrise, a MercuryPitch supporter scene — **Sunrise Pavilion** Supporter preview

Support the studio Every scene marked Included is free, with no account. Active supporters unlock the rest as they ship — and a supporter's scene is what everyone in the room sees.

See supporter perks

This is what singing looks like

Watch your pitch land, in real time.

This panel runs the real engine — press Play and sing.

Your voice draws a living line across the staff, and every note tells you how close you landed — green when you nail it, amber when you’re close, red when you drift. Then flip to Piano or Karaoke and play those too.

LIVE

C Major

Accuracy

Perfect0

Excellent0

Good3

Okay4

Off1

Voice

Aria

piano

LIVEPerfect 0 · Good 3 · Okay 4 · Off 1Score 53%

That was your voice, analyzed on this page — nothing was uploaded. Get the full 60-second Mirror →

Your path

Progress you can hear.

No lectures. You sing, you score, you level up — and the app quietly steers you toward the notes you keep missing.

LEVEL 01

Match a note

Pick a key, sing it, watch the bar turn green. That's the whole loop — and it's instantly satisfying.

LEVEL 02

Run a scale

Step through major and minor scales with a moving target and a count-in metronome.

LEVEL 03 · NOW

Beat your weak spots

Focus Mode reads your history and builds drills around the intervals you struggle with.

LEVEL 04

Take on the world

Enter weekly challenges, climb the leaderboard, and jam live with other singers.

The community

You're never practicing alone.

Share melodies, race the leaderboard, and take challenges that refresh every week. Practice sticks when other people are in it with you.

Weekly leaderboard

Live

lunar_lark
14-day streak98.4%

aria_sings
9-day streak96.1%

perfect5th
21-day streak95.7%

flux_capacitor
3-day streak93.0%

echo_chamber
6-day streak91.8%

Perfect octave

Hold a clean octave jump within ±10¢.

Try

Speed scales

Run a two-octave scale at 120 BPM, clean.

Try

Karaoke duel

Out-sing a friend on a backing track.

Try

Jam relay

Trade four-bar phrases live, peer to peer.

Try

Inside the Voice Mirror

Sing the Universe.

Some melodies here weren't written — they were measured. Sing Orion's stars by their positions in the sky. Match five famous pulsars by their spin rates. Hold the Perseus black hole's B♭. Real cosmic data, fitted to your range, scored like everything else.

Orion, as a melody — star positions become pitches in your range.

Five pulsars, five tempos

Geminga4.2 Hz
Vela11.2 Hz
Crab29.9 Hz
PSR B1937+21642 Hz
PSR J1748−2446ad716 Hz

The Perseus black hole

Hums a B♭ — 57 octaves below middle C. We bring it up into your range. You hold it. We score the hold.

These live inside the Voice Mirror. Sing the sky in 60 seconds →

Everything in the box

The whole studio.

Every mode scored by the same on-device engine.

In-depth vocal analysis

Every take measured — accuracy in cents, vibrato in hertz, onset in milliseconds — feeding a voiceprint that tracks your deltas.

Cents, not starsVibrato: 5.6 Hz · ±26¢Onset: scoops ~180 ms

Voice exercises

Warm up with glides, holds, and matches fitted to your range — sub-cent tracking while you sing.

Fitted to your rangeOnce, Repeat, cyclic modesSub-cent tracking

Focus Mode & trends

Practice that reads your history: drills built from the notes you miss, at a difficulty that follows your last ten scores.

Drills your missed notesAdapts to last 10 scoresWeekly trends

Piano practice

Put a keyboard on screen and follow the falling notes — every key you hit scored by the same engine.

Falling-note viewMIDI keyboard inScored per note

Guitar practice

Point the mic at your guitar: tuning, riffs, and chords tracked string by string, scored in cents.

Tuner built inRiffs & chordsWorks acoustic or amped

Any song, separated

Drop in a track you own, split it on your device, mute the vocal and take its place — lyrics synced on screen.

On-device separationSynced lyricsPer-section key detection

Compose & share

Sketch a melody note by note, record a take, dial between “As sung” and “Clean”, and send it as a link.

As sung ↔ CleanMIDI in & outShare as URL — no account

Challenges

Timed pitch challenges against the clock and the leaderboard — share a round as a link, no account wall.

Timed roundsLeaderboardShare with a link

Jam together

Bring up to 12 singers into a shared karaoke session. Voice connects directly between singers whenever your networks allow it.

Shared karaokeUp to 12 singersDirect voice where possible

Why it's free

A community can't grow behind a paywall.

So the singing loop stays open: Voice Mirror, practice, on-device analysis, Karaoke Night, Jam Rooms, and challenges are free. Supporter room editions fund the studio without putting participation behind a paywall; compute-heavy cloud processing is priced separately at cost.

Free on-device Open source · AGPL-3.0 Private by default Supporter style, not access

Questions

Before you join.

Is it really free, or free-with-a-catch?

Genuinely free. Voice Mirror, practice, on-device analysis, Karaoke Night, Jam Rooms, community, and challenges are available without a subscription. Supporters can unlock premium room editions and help fund the studio; advanced cloud processing is priced separately because it uses real compute.

Is my voice private?

Pitch detection runs entirely in your browser, so your mic audio never leaves your device.

I can't sing yet — is this for me?

Especially. The Mirror isn't a test you pass — it's a baseline. Nobody hears you but you, and every session after it aims at the exact notes you miss, so beginners improve fastest.

Do I need an account to join the community?

You can practice instantly with no account. A profile lets you appear on the leaderboard, save streaks, and enter challenges.

Can I sing with friends?

Yes. Jam Rooms bring up to 12 singers into a shared session with synchronized karaoke lyrics, singer assignments, and live pitch lanes. Voice connects directly between singers where network topology permits.

What are the six characters?

Aria, Blaze, Flux, Luna, Glint and Echo — playback voices, each mapped to its own instrument (piano, synth, organ, strings, sine and a mellow piano). Pick the timbre you like to practice against.

Join in

Add your voice to the chorus.

The Mirror takes 60 seconds, alone with your browser. Everything it starts — the practice, the challenges, the leaderboard — is where the community picks you up.

Mirror your voice — 60 seconds, free → Explore the app

Get the occasional update

New features, community challenges, and singing tips — a few times a year, nothing more.

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