About EditMIDI and its focused MIDI tools

Local-first by design

MIDI parsing, editing, preview, undo, and download happen in the browser. A file reaches our cloud only when a signed-in Creator Cloud customer explicitly saves a project.

Honest scope

The browser player uses a small preview SoundFont with an oscillator fallback. A separate local workflow creates a full-duration note render with that piano-and-hat bank as WAV or MP3 for timelines up to five minutes; program changes, controllers, sustain, and pitch bend are not rendered. Creator Cloud includes constrained AI note continuation, rewrite, and harmony, while local audio pages provide rough 30-second monophonic melody drafts. Offline applications, studio-grade instruments, full-song transcription, and collaboration are not part of the current product.

Built for bounded, inspectable changes

The focused pages use one MIDI document engine, so transpose, tempo, quantize, velocity, playback, and the full editor share the same validation and export behavior. A tool names the events it changes and keeps unrelated events in the lower-level timeline.

Clear limits are part of the product rather than hidden failure modes. EditMIDI accepts Standard MIDI File Type 0 and Type 1 with PPQ timing, up to 5 MB and 20,000 events. Unsupported timing or malformed data is rejected before a partial edit begins.

Who uses EditMIDI

A producer can correct a key or tempo without opening a full session. A teacher or student can inspect tracks and note timing. A developer can verify a generated MIDI file before passing it to another system. In every case, the free workflow ends with a normal MIDI download that remains usable outside EditMIDI.