Free Synthesia alternative in your browser

midee is a free Synthesia alternative for people who want to open MIDI files in the browser, play along with them, use a MIDI controller live, loop ideas, record sessions, and export beautiful piano-roll videos.

Synthesia is still a great native piano-learning app. midee is different: it is web-native, open source, no-install, no-account, and built around three fast workflows: play a MIDI, play live, and practice.

Why people look for a Synthesia alternative

Most searches for "Synthesia alternative" come from one of these needs:

• "I want to open my own MIDI files without friction."
• "I want a falling-notes visualizer in the browser."
• "I want to play live with a MIDI controller."
• "I want wait-mode practice, but not a heavy native-app workflow."
• "I want to record or loop what I play."
• "I want a shareable MP4 piano-roll video."

midee is strongest when you want the browser version of that idea: instant, visual, private, and easy to share.

Quick comparison

The hero difference: live mode

Live mode turns midee into a visual instrument. Plug in a MIDI controller, use your computer keyboard, or click the on-screen keys. Notes appear as live falling trails, the keyboard lights up, and the sound is routed through the same browser audio engine as playback.

Live mode is useful when you want to:

• Jam without opening a DAW.
• Warm up on a MIDI keyboard.
• Make a quick visual performance.
• Record a phrase as MIDI.
• Loop a bar-snapped idea and overdub layers.
• Use the visualizer as a background for practice or streaming.

Read more in the live MIDI keyboard guide.

Learn mode: play along and train

midee's Learn mode is the reason it is more than a visualizer. It includes guided exercises for practicing with your MIDI keyboard or computer keyboard:

Play-along mode is the closest Synthesia-style workflow: load a MIDI, slow it down, practice hands, mark loop points, and use wait mode so the piece only moves when you clear the chord.

Sight reading is different from Synthesia. It trains the skill underneath the falling notes: reading notation quickly enough to play the right key on time.

When Synthesia is still the better choice

Use Synthesia if you want a mature native app focused primarily on piano lessons, mobile/tablet workflows, built-in song libraries, and long-established practice behavior.

Use midee if you want:

• A free browser-based MIDI player and visualizer.
• Live MIDI controller play with beautiful visuals.
• A simple loop station and session recorder.
• Wait-mode play-along practice from your own MIDI.
• Sight-reading and ear-training exercises.
• MP4 export for YouTube, TikTok, Reels, or sharing.
• No upload, no account, no install.

For a direct feature-by-feature comparison, see midee vs Synthesia.

Common questions

Is midee actually a Synthesia alternative? Yes, for browser-based MIDI playback, falling-note visualization, live play, wait-mode play-along, and export. Synthesia remains stronger as a dedicated native lesson app.

Can I use my MIDI controller? Yes. midee supports Web MIDI controllers in browsers that expose the Web MIDI API.

Can I practice a MIDI file with wait mode? Yes. Learn mode's play-along exercise pauses at each chord until you play the expected notes.

Can I train sight reading? Yes. midee includes a sight-reading trainer with scrolling staff notes, clef options, tempo controls, accuracy, streaks, and weak-note practice.

Can I record what I play? Yes. Live mode can record sessions and save loops as MIDI.

Can I export a video like Synthesia videos on YouTube? Yes. midee exports piano-roll MP4 videos with audio. See MIDI to MP4.

Try it

Open midee, load a MIDI, then try Play, Live, and Learn. If you came looking for a Synthesia alternative, start with a MIDI file you already know.