MIDI to MP4: convert a MIDI file to video

The fastest free way to convert a MIDI file to MP4 is to open midee, drop in your .mid, choose a look, and export a piano-roll video directly from your browser. There is no account, no upload, no watermark, and no screen recorder to set up.

This guide is for anyone who wants to turn a MIDI into a shareable video for YouTube, TikTok, Reels, Instagram, Discord, a lesson page, or a portfolio. If you just want to listen to a MIDI file without exporting, see the free online MIDI player.

Quick steps

1. Open midee.app in Chrome, Safari, or Firefox.
2. Drag your .mid file anywhere on the page.
3. Press play to preview the piano-roll visualization.
4. Pick a theme, instrument, and particle style if you want a specific mood.
5. Click Export in the top right.
6. Choose 720p, 1080p, vertical, square, or native resolution.
7. Click Start. The MP4 downloads to your device when rendering finishes.

That is the whole MIDI-to-MP4 workflow. Everything happens locally in the browser tab.

What you get

Why convert MIDI to MP4?

MIDI files are great for music software, but terrible for sharing. Most people cannot preview a .mid in a social feed, and many phones do not know what to do with one. An MP4 is different: it plays everywhere, embeds cleanly, uploads to every major platform, and lets people see the notes as they hear them.

That is why piano-roll videos work so well. They turn a sequence of MIDI notes into a visual performance: falling notes, glowing keys, track colors, particles, and audio in sync.

Why most other options are slower

Screen recording: Open Synthesia or MIDIano, capture with OBS or QuickTime, trim the start and end, check the audio, export again. It works, but now you are managing multiple tools and hoping the frame rate stays clean.

Upload-to-render services: Upload a MIDI, wait for a server, download a video. Fine for a one-off render, but not ideal for private arrangements, unreleased music, or quick experiments.

Paid native software: SeeMusic and similar apps can make beautiful videos, but they are more than many people need for an occasional MIDI export.

midee exists for the simple case: drop in a MIDI, make a clean video, keep your file on your own device.

Picking the right aspect ratio

Match the export size to where you plan to post:

If you are unsure, choose 1080p for YouTube and vertical for short-form platforms.

Make the video look intentional

Small choices change the feel of a MIDI video:

• Theme: Dark is clear and classic. Neon suits electronic tracks. Sunset works well for emotional piano and film-score pieces. Ocean feels calm and ambient.
• Instrument: The sampled piano is the safest default for piano music. Rhodes, pad, pluck, strings, guitar, flute, and other voices can make non-piano MIDIs feel less mechanical.
• Particles: Sparks and embers make note attacks more lively. Turn particles off if you want a cleaner teaching-style video.
• Tracks: If a MIDI has many parts, hide tracks you do not want in the final visual.

The goal is not to overproduce. A clean piano-roll video that exports quickly is often better than a heavily edited render that never gets posted.

How midee exports MP4 in the browser

When you start an export, midee renders the piano-roll scene frame by frame with WebGL, encodes the video with the browser's WebCodecs VideoEncoder, renders audio offline, and muxes the result into an MP4 file. The technical result is a normal H.264 MP4 that uploads cleanly to social platforms.

The important part: your MIDI file, rendered frames, audio, and final MP4 stay on your machine. There is no server-side render queue.

If you want the engineering story, read why midee replaced ffmpeg.wasm with WebCodecs.

MIDI to MP4 vs other workflows

Common questions

Can I convert MIDI to MP4 for free? Yes. midee exports MP4 videos for free. There is no paid tier, no export watermark, and no account requirement.

Does midee upload my MIDI file? No. Playback, visualization, audio rendering, video encoding, and MP4 creation happen in your browser.

Can I make vertical MIDI videos for TikTok or Reels? Yes. Choose the vertical export preset for a 9:16 video.

Will the MP4 include audio? Yes. The exported MP4 includes the rendered instrument audio, so you can upload it directly.

Can I use copyrighted MIDI files? midee will open standard MIDI files, but you are responsible for rights and platform rules when sharing the resulting video.

Is this the same as converting MIDI to audio? Not exactly. midee creates a video with audio. If you only need an audio file, use a MIDI-to-audio renderer. If you want a visual piano-roll video, use MIDI to MP4.

Can I just play the MIDI without exporting? Yes. midee also works as an online MIDI player and MIDI visualizer.

Try it

Open midee, drop a .mid, preview it, and export a clean MP4. Start with 1080p for landscape videos or vertical for Shorts, TikTok, and Reels.