midiviewer.io Local by default
Online MIDI viewer

Online MIDI Viewer — See What Your MIDI Is Made Of

Open a .mid or .midi file and turn raw sequence data into tracks, instruments, timing, and a playable piano roll. No DAW. No account. No upload for viewing.

01ViewerOpen a MIDI and see its notes, tracks, timing, and structure.02VisualizerWatch notes fall toward a keyboard in a track-colored waterfall.03InspectorInspect tempo, meter, instruments, channels, ranges, and events.04PlayerBuild a local playlist with GM playback, loop, speed, solo, and mute.05EditorSelect, delete, transpose, quantize, change tempo, and export MIDI.06ConvertRender a MIDI file as high-quality MP3 or uncompressed WAV audio.
Processed locally in your browser. Nothing is uploaded.
No file selected.mid or .midi · up to 20 MB
FORMAT—LENGTH—TRACKS—EVENTS—
PIANO ROLL PREVIEWOpen a file to explore every note
00:00 / 00:00
One file, several useful jobs

All MIDI tools

Choose the workspace that matches what you need to learn, change, hear, or export.

01Viewer

Open a MIDI and see its notes, tracks, timing, and structure.

02Visualizer

Watch notes fall toward a keyboard in a track-colored waterfall.

03Inspector

Inspect tempo, meter, instruments, channels, ranges, and events.

04Player

Build a local playlist with GM playback, loop, speed, solo, and mute.

05Editor

Select, delete, transpose, quantize, change tempo, and export MIDI.

06Convert

Render a MIDI file as high-quality MP3 or uncompressed WAV audio.

The practical guide

A readable window into any MIDI file

MIDI is not recorded audio. It is a compact set of musical instructions: which note begins, when it starts, how hard it is played, which instrument program should answer, and when the note ends. That makes MIDI flexible, but it also means an ordinary media player cannot show you what is actually inside the file.

This online MIDI viewer translates those instructions into a practical workspace. The summary gives you duration, tempo, meter, tracks, note count, and event count. The piano roll maps time from left to right and pitch from low to high, while track colors reveal how the arrangement is layered. Playback uses General MIDI programs instead of forcing every track through one piano sound.

For free viewing and playback, the file is read directly by your browser. It is not sent to a server, and you do not need to create an account. This makes the viewer useful for personal drafts, downloaded practice material, game music, old arrangements, and files you simply want to identify before opening a full music production application.

What you can learn

Track-aware playback

Program and channel data select the intended General MIDI family, including the standard drum channel.

Visual timing

Zoom and scroll through note starts, lengths, pitches, track colors, and the moving playhead.

Mix isolation

Solo an individual layer or mute distracting tracks while studying the arrangement.

Instant metadata

See format, duration, BPM, time signature, track count, note count, and event count.

No forced sign-in

Opening and playing a MIDI file is a free local action, not an account funnel.

Built for real scores

Type 0 and Type 1 files, tempo changes, multi-track arrangements, and drums are handled.

Made for real files

Useful before you reach for a DAW

  • Check whether a downloaded MIDI contains separate instrumental parts or one merged performance.
  • Find the tempo, meter, range, and duration before importing a file into notation or production software.
  • Study the shape of a bass line, melody, drum pattern, or accompaniment using track colors and solo controls.
  • Preview old project files on a computer where your original DAW or virtual instruments are not installed.
  • Confirm that a generated or exported MIDI is structurally valid before sending it to another person.
Questions, answered

Before you open a file

Does the viewer upload my MIDI file?

No. Viewing, inspection, visualization, and playback read the file in browser memory. Future server export tools will clearly disclose when a temporary upload is required.

What file types are supported?

The current viewer officially supports Standard MIDI files with .mid or .midi extensions, up to 20 MB. It does not claim RMID support.

Why can the sound differ from the original song?

A MIDI file stores performance instructions, not the original recordings or plug-ins. Playback uses a General MIDI sound bank, so the arrangement remains recognizable while the exact timbre may differ.

Can I use this on a phone?

Yes. Upload, metadata, transport controls, track mixing, and horizontal piano-roll scrolling are designed for modern mobile browsers.