MACOS MIDI BROWSER • ANALYZER • PLAY-IN-KEY SCALE KEYBOARD

TURN MIDI FOLDERS INTO SEARCHABLE MUSICAL LIBRARIES

MIDI Xplorer detects keys, scales, chords, tags, BPM, duration, instruments, and mood so you can find the right MIDI idea fast. Preview it in a piano roll, quantize or transpose on the fly, drag it into your DAW, then play the keyboard in key on top of any MIDI file or live audio input to test your inspiration and get closer to ideas that match your taste.

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Play In Key & In Scale
Key Scale & Chord Analysis
3 Standalone, AU, VST3
Libraries
All 44
Favorites 0
Recently Played 50
Desktop 44
Search files, keys, instruments...
44 files
All Keys
Sort: Scale
Volume:
☆ C Chromatic (C/Am) appass_1.mid Acoustic Grand Piano 71.3 KB 165 bpm 388bar 9:21
☆ C Chromatic (C/Am) beethoven_hammerklavier_1.mid Acoustic Grand Piano 72.5 KB 137 bpm 342bar 9:54
☆ C Lydian (Ma... (G/Em) BREAK MIDI 2.mid --- 711 B 136 bpm 0:03 / 0:07
☆ C Phrygian (... (G#/Fm) BREAK MIDI 3.mid --- 234 B 136 bpm 4bar 0:07
☆ C Dorian (Ma... (A#/Gm) BREAK MIDI 4.mid --- 407 B 136 bpm 4bar 0:07
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SEE IT IN ACTION

Watch How MIDI Xplorer Works

See how fast a raw folder of MIDI files becomes searchable, playable, transformable, and DAW-ready.

EXPLORE THE INTERFACE

Every Control, Explained

From libraries and smart search to the piano roll, scale keyboard, and playback controls — here is the full MIDI Xplorer workspace at a glance.

Annotated MIDI Xplorer interface showing libraries, search, filters, file list, piano roll preview, scale keyboard, and playback controls

SEARCH, ANALYZE, PREVIEW, CREATE

Everything You Need to
Control a Huge MIDI Library

MIDI Xplorer is built for producers, composers, and MIDI library power users who need musical metadata, fast preview, reliable DAW import, and a play-in-key scale keyboard in one macOS tool.

Scan and Organize Libraries

Add custom MIDI folders, scan recursively in the background, pause or refresh libraries, and relaunch faster with a persistent file cache.

Find by Musical Metadata

Search and filter by file name, detected key, scale type, extracted tags, BPM, duration, instrument type, genre-style hints, or mood.

Analyze MIDI Musically

Detect key, scale, confidence, chords, single-note files, BPM, duration, note range, tracks, timing, events, and filename metadata.

Preview in a Piano Roll

Play, pause, seek, shuffle, repeat, zoom, pan, inspect hovered notes, highlight active notes, and view chords while browsing.

Transform Before Export

Transpose, scale velocity, quantize, add swing, use tuplets or mixed grids, and reset transforms without damaging the original MIDI.

Play In Key on Any Scale

Play a scale keyboard locked to the selected MIDI file's scale or a live audio input. Use chord mode for scale-based chords or single note mode to play the notes in key, with a bundled instrument library to experiment with.

BUILT FOR MIDI POWER USERS

More Than a File Browser:
A Complete MIDI Workflow Hub

MIDI Xplorer combines library management, musical analysis, playback, transformation, DAW handoff, and a play-in-key scale keyboard without forcing every feature into your first session.

Library Management

  • Add, refresh, disable, remove, and reveal MIDI libraries
  • Use All, Favorites, and Recently Played library views
  • Copy file paths, rescan key detection, and inspect file details

Deep MIDI Analysis

  • Recognizes .mid and .midi files with broad scale coverage
  • Reads filename keys, scales, instruments, genre tags, and moods
  • Surfaces confidence, chords, note ranges, timing, and event data

Preview and Transform

  • Built-in playback, piano roll, transport, shortcuts, and history
  • Non-destructive transpose, velocity, quantize, swing, and tuplets
  • Temporary drag copies for reliable DAW and Finder import

Play In Key & In Scale

  • Play a scale keyboard from the selected MIDI file or a live audio input
  • Switch between chord mode and single note mode, always in key
  • Experiment with a bundled instrument library as you perform

HOW IT WORKS

From Folder to
Finished MIDI Idea

01

Add Your MIDI Libraries

Point MIDI Xplorer at local or external folders. It recursively scans standard MIDI files, analyzes them in the background, and keeps your library state persistent.

02

Search by Musical Meaning

Filter by key, scale, tags, BPM, duration, instrument, mood, and sort order so a huge folder behaves like a musical database.

03

Preview and Shape It

Use the piano roll, transport, seek, zoom, transpose, velocity scaling, quantize, swing, and tuplets to test the idea before export.

04

Drag, Export, or Play Along

Drag MIDI into your DAW or Finder, use host transport sync in plugin mode, or play the scale keyboard in key on top of the selected MIDI file or a live audio input.

ANALYZE, TRANSFORM, PLAY

A MIDI Command Center
For Large Libraries

MIDI Xplorer works as a native macOS standalone app and as a DAW MIDI utility before virtual instruments. Use it to inspect, preview, reshape, export, or play in key on top of your MIDI files and audio input while keeping the original file library intact.

  • Confidence-scored key and scale detection
  • Chord, note range, track, timing, and event inspection
  • Broad scale recognition including modes, blues, jazz, world, and advanced modal scales
  • Piano roll preview with live playhead and active-note highlighting
  • Quantize, swing, transpose, and velocity shaping before export
  • Play-in-key scale keyboard with chord mode and single note mode from any MIDI file or audio input

INCLUDED WITH MIDI XPLORER

VoiceMIDI is part of
the same package

VoiceMIDI turns singing or humming into playable MIDI notes and chords, then syncs with MIDI Xplorer so your voice follows the selected key and scale inside Logic Pro, Ableton, or your DAW.

Sing the idea Capture melodies, basslines, and chord tones without reaching for the keyboard first.
Stay in key Match MIDI Xplorer's key and scale so sung notes land musically in the session.
Drag the MIDI Record a take and move clean MIDI into your DAW for editing, arranging, or sound design.
Explore VoiceMIDI
VoiceMIDI interface showing key and scale sync, Play In Key, chord mode, performance mode, record, and MIDI drag controls

WORKS WITH YOUR SETUP

Compatible With
Your Studio Workflow

Use MIDI Xplorer as a standalone macOS app, a VST3 MIDI effect, an Audio Unit plugin, or an optional legacy VST2 build when a valid VST2 SDK is provided. The MIDI Xplorer FX version lets you preview MIDI files through any local VST instrument.

Ableton Live
Logic Pro
FL Studio
Studio One
Reaper
GarageBand
Cubase
Bitwig Studio

Standalone macOS App

Built-in preview instrument and device settings

AU / VST3 MIDI Utility

Works before virtual instruments in your DAW

MIDI Xplorer FX

Preview MIDI files through any local VST instrument

TRY IT FIRST

Make Sure It Fits
Your Real DAW Workflow

Download MIDI Xplorer, scan your own MIDI library, preview and transform ideas in context, play the scale keyboard in key on top of your files and audio input, and drag files into a real project before deciding anything.

TRY BEFORE YOU BUY

Test MIDI Xplorer with your own sound, setup, MIDI packs, and DAW.

The best proof is inside your session. Install it, open it standalone or in your DAW, and see whether analysis, piano-roll preview, transforms, drag-and-drop, and playing in key on top of your MIDI actually speed you up.

Your MIDI library Scan, tag, analyze, filter, and cache large MIDI folders.
Your DAW Try standalone, AU, or VST3 workflows in your setup.
Your decision Upgrade only after the workflow feels useful.
Try MIDI Xplorer See Tutorials

Pricing stays on its own page for when you are ready to upgrade.