MIDI Inspector

by jsl+ · Tools

Manifest V3 Free

View in Chrome Web Store Data as of 20 Oct 2026

Every note, inspected. Open and play .mid/.midi files from any web page.

Users

+24 in 30 days

Rating

5.0 / 5

+5.00 in 30 days

Ratings

+1 in 30 days

Store rank

#117K

#98K among extensions

Version

0.3.1

updated 10 May 2026

Users

monthly, 5 months

Latest, 20 Oct 2026: 41 usersMove the mouse over the chart for any month

Ratings count

monthly, 5 months

Latest, 20 Oct 2026: 1 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About MIDI Inspector

MIDI Inspector turns your browser into a full MIDI viewer and player. Right-click any .mid or .midi link → "Open in MIDI Inspector" and the file plays instantly with the bundled MuseScore_General SoundFont. Drop your own .mid/.sf2/.sf3 files in too. FEATURES • Piano Roll with measure/beat ruler and locate-playhead • Per-track mute/solo and per-channel filter • Chord analysis, tempo curve, velocity view, raw protocol inspector • Drag-and-drop .mid files or right-click links on any page • 8 languages: English, Español, Français, 简体中文, 繁體中文, 日本語, Tiếng Việt, Русский • Light and dark themes • Bundled GM-compatible SoundFont (~40 MB) — works offline • Load your own .sf2 / .sf3 / .dls SoundFont anytime PRIVACY Everything runs locally in your browser. No telemetry, no analytics, no uploads. The <all_urls> permission is used only to fetch the specific MIDI URL you chose to open. Full policy: https://midi.jsl.plus/privacy