Features
Mixtuby turns YouTube music into a calming Vibe Mode packed with relaxing games and tools — all free, no signup, instant.
Vibe Mode tools
Tap any tool to jump straight into Vibe Mode with it open. Each one plays over your music.
Karaoke — Synced Lyrics
Sing along to whatever is playing with time-synced lyrics that scroll line by line, perfectly aligned to the music. No app, no signup — it works on any YouTube song with available lyrics.
How to use
Start any song in Mixtuby.
Open Vibe Mode (moon icon) and tap Karaoke.
Lyrics appear and follow the track automatically — the current line is highlighted.
Auto line-sync
The active lyric line highlights and scrolls in real time so you never lose your place.
Works over your music
Karaoke runs as an overlay on the song already playing — switch tracks and the lyrics follow.
Does Mixtuby karaoke work on any song?
It works on any YouTube song that has time-synced or plain lyrics available. If a song has no lyrics on file, karaoke simply stays off for that track.
Do I need an account for karaoke?
No. Karaoke is free and works instantly with no signup.
Rubber Duck (DJ Quack)
Inspired by the legendary debugging technique from "The Pragmatic Programmer" by Andrew Hunt & David Thomas. When you're stuck, explain the problem step-by-step to a rubber duck — articulating it forces your brain to think clearly and often reveals the solution on its own. Tap DJ Quack and he quacks in time with the beat.
How to use
Open Settings (gear icon) and enable Rubber Duck.
A duck button appears in the header — tap it to summon DJ Quack.
Tap the duck to make him quack on the beat, or just talk your problem through.
12 unique skins
Browse with the left/right arrows — from classic yellow to themed variations. Your pick saves automatically.
31 animated affirmations
Encouraging phrases with a scale-up + particle burst across 4 moods (listening, encouragement, approval, thinking). They appear every 12–30s while playing.
What is the rubber duck feature for?
It's a focus and problem-solving companion based on "rubber duck debugging" — explaining a problem out loud to the duck helps you think clearly while music plays.
Baby Sleep Game
A relaxing falling-ducks game designed to help you and your baby fall asleep, built on clinically validated sleep psychology — not just a gimmick. Catch the slowly falling ducks while the screen gently dims toward darkness.
How to use
Enable it in Settings → Baby Sleep Game.
Open Vibe Mode (moon icon in the navbar).
Tap Sleep → choose a playlist → set the timer → Start.
Ducks fall slowly — tap to catch them. The screen dims over time. Drift off.
Cognitive Shuffle
Random visual stimuli (ducks at different positions, sizes, hues) stop your brain forming coherent anxious thoughts. Dr. Luc Beaudoin (SFU, 2015) showed this cuts sleep onset by 40–60%.
Bilateral tapping
Repetitive tapping activates the parasympathetic nervous system (Porges' Polyvagal Theory); the haptic buzz on each catch reinforces the calming reflex.
Progressive dimming
The screen darkens from 0% to ~95% over the timer, mimicking a natural sunset to cue melatonin release.
Descending stimulation
Ducks spawn less often and fall slower as time passes — your nervous system follows the fading intensity toward sleep.
How does the Baby Sleep Game help parents?
The baby falls asleep from the music (lullabies, rain). You fall asleep from the game — it keeps your hands busy so you don't scroll your phone (blue light keeps you awake). Through co-regulation, your calm helps the baby settle faster.
Is the Baby Sleep Game free?
Yes — it's free, with no account, and pairs with built-in sleep playlists like Rain, Forest, 528Hz and Lullabies.
Typo — Falling Words
Catch falling words by typing them before they reach the bottom. A fast, satisfying typing game that scores you on speed and accuracy while your music keeps the rhythm.
How to use
Open Vibe Mode and tap Typo.
Words start falling — type each one and press to clear it before it lands.
Build a streak. Your best score is kept on the leaderboard.
Speed + accuracy scoring
Every cleared word adds points; misses cost you. It's a genuine typing workout, not a timer-killer.
Lyric-aware words
When lyrics are available, the falling words can come from the song you're playing — so you type along to the track.
Is Typo good for practising typing?
Yes. Because it scores both speed and accuracy and feeds words continuously, it doubles as a light typing-practice game you can play to music.
Breathe — Guided Breathing
Follow guided breathing patterns with on-screen pacing to calm anxiety, lower stress and fall asleep faster. Six science-backed techniques — the Physiological Sigh (Dr. Huberman) for fast relief from panic, 4-7-8 (Dr. Weil) to wind down for sleep, and Box breathing (Navy SEALs) to steady you under stress — each with calm visual and audio cues.
How to use
Open Vibe Mode and tap Breathe.
Pick a technique (e.g. Box 4-4-4-4 or relaxing 4-7-8).
Breathe in, hold and out following the expanding circle and the soft cues.
The right technique for each moment
Panicking? The Physiological Sigh calms acute stress in as little as 20 seconds. Stressed? Box breathing steadies you. Can't sleep? 4-7-8 winds the body down. Every technique is tagged with its benefit so you choose in one tap.
6 proven techniques
Box, 4-7-8, coherent breathing and more — each with its own pacing for calm, focus or sleep.
Real breath audio cues
Natural breath sounds mark each phase plus a soft tone at the end — never robotic, never stretched.
Which breathing technique is best for sleep?
The 4-7-8 pattern (inhale 4, hold 7, exhale 8) is widely used to fall asleep faster because the long exhale calms the nervous system. Box breathing is better for focus.
How do I stop a panic attack with breathing?
Try the Physiological Sigh (Dr. Andrew Huberman, Stanford): two short inhales through the nose, then one long, slow exhale through the mouth. It is the body's natural reset — research suggests it eases acute stress quickly by activating the parasympathetic nervous system. Repeat a few rounds. This is a relaxation aid, not a substitute for medical care.
What breathing exercise lowers cortisol?
Slow breathing with a long exhale — like 4-7-8 and coherent breathing (5 in, 5 out) — stimulates the vagus nerve and the parasympathetic system, which research links to lower cortisol and stress. A few minutes of paced breathing is the simplest way to start.
Does box breathing reduce stress?
Box breathing (4 in, 4 hold, 4 out, 4 hold) is used by Navy SEALs to stay calm under pressure. Its even rhythm helps balance the autonomic nervous system and steady focus during stress.
Party — Light Show
Turn your screen into a full-screen light show that pulses with the music — 11 layered effects, from spotlights to confetti bursts. Prop your phone up and your room becomes the dance floor.
How to use
Open Vibe Mode and tap Party.
The whole screen turns into a reactive light show synced to the beat.
Prop the phone facing the room for maximum effect.
11 layered effects
Spotlights, strobes, color washes and confetti combine and react to the energy of the track.
Never goes blank
A minimum-activity floor keeps the show alive even on quiet passages, so the room never goes dark unexpectedly.
Can I use Party as a music visualizer for a room?
Yes — it's built for it. Full-screen, beat-reactive, and bright enough to light a room when you prop your phone or cast it to a screen.
Shooter — Rhythm Arcade
Shoot incoming targets in rhythm with the track for a fast-paced arcade game that turns any song into a level. Tap to fire, chain combos, and climb the leaderboard.
How to use
Open Vibe Mode and tap Shooter.
Targets fly in to the beat — tap to shoot them before they pass.
Chain hits for combo multipliers and a higher score.
Beat-matched targets
Targets and effects ride the music, so every song plays like a different level.
Smooth on old phones
Bullets and explosions are animated to stay smooth even on low-end devices, without dropped frames.
Does the Shooter work with any song?
Yes. It reacts to whatever you're playing, so any track becomes a playable rhythm level — no special files needed.
Stars & Constellations Theme
Enabled by default — an animated night sky fills the background with twinkling stars, slow constellations, and occasional shooting stars. Combined with Vibe Mode and the duck game, it creates an immersive "falling asleep under the stars" experience. Turn it off any time in Settings → Stars Theme.
More Features
Crossfade (Desktop)
Smooth transitions between tracks (1-30s) on desktop. Or enable gapless for instant switches.
A-B Loop per Track
Loop just the chorus, a solo, or any segment. Set loop count and what happens after.
Sleep Timer
15 min to 2 hours. Music fades out automatically. Perfect for bedtime.
30 Mood Playlists
Chill, Study, Gym, Baby, Rain, Forest, 528Hz, Meditation — tap your mood and music starts.
Per-Track Speed
0.25x to 2x on each track. Slow down for practice, speed up for energy.
100% Free, No Account
No trial, no credit card. Everything auto-saves in your browser.
Frequently Asked Questions
Is Mixtuby free? ＋
Yes. Mixtuby is 100% free — no account, no trial, and no credit card. Everything saves automatically in your browser.
Do I need an account to use Mixtuby? ＋
No. Every feature, playlist, and Vibe Mode tool works without signing up. A free account only adds favorites and sync across devices.
How is Mixtuby different from YouTube? ＋
YouTube stops between videos and pulls you toward recommendations. Mixtuby plays music continuously, organizes everything by mood, and adds karaoke, synced lyrics, A-B loop, and Vibe Mode — the original Mixtuby experience — on top of the same YouTube player.
Can I play my own YouTube playlists on Mixtuby? ＋
Yes. Paste any public YouTube playlist link into the Add Tracks tab and it imports instantly, then plays continuously like every built-in mix.
What does the crossfade do? ＋
Crossfade overlaps the end of one track with the start of the next, so the music never drops to silence. It is a desktop feature, adjustable from 1 to 30 seconds, or switch to gapless for instant cuts.
What is Vibe Mode in Mixtuby? ＋
Vibe Mode is a calm full-screen mode with relaxing games and tools that play over your music to help you wind down and fall asleep.
Does Mixtuby work on my phone? ＋
Yes. Mixtuby runs in any modern browser on phone, tablet, desktop, and TV, and installs as an app in two taps from the browser menu.
Can I watch movies or listen to podcasts on Mixtuby? ＋
Yes. Mixtuby plays any YouTube content, not just music. You can watch classic films — like the Louis de Funès collection — listen to podcasts, or queue long DJ sets. Everything streams through YouTube's official embedded player.