Midi AI is a web-based AI MIDI variation generator. Upload any MIDI file, describe the change you want, and the AI returns a new version grounded in your source. You can also generate MIDI from scratch using the Studio.
Upload a .mid file (a loop, melody, chord progression, or full arrangement). The AI detects the key, parses your notes, and uses your prompt to write a variation that stays coherent with the source. You can iterate with new prompts on the same upload without re-uploading.
Variations of any uploaded MIDI — transpose to a new key, change the rhythm, reharmonize, add syncopation, thicken or thin out voicings, or reinterpret in a different style. The Studio also lets you generate melodies, chord progressions, basslines, and drum patterns from scratch.
All generated files are standard .mid (MIDI) format. They work with any DAW — Ableton, FL Studio, Logic Pro, GarageBand, Reaper, and others.
Yes. An account is required to generate and save MIDI files. Signing up takes about 10 seconds with Google login.
You add funds to your account and pay per generation. The minimum deposit is $5, and credits never expire. There is no subscription and no monthly fee.
Credits are prepaid dollars on your account. Each generation costs what it costs to run, so a simple prompt costs less than a full arrangement. Your billing page shows the charge for every action.
Yes. You own full rights to every MIDI file you generate. Use them in songs, beats, film scores, games, or any other project — no attribution required.
The sample library is a collection of 1,000+ pre-made MIDI files organized by genre — jazz, lo-fi, trap, EDM, cinematic, and more. You can preview and download them directly from the site.
Yes. The Studio includes a built-in piano roll editor for moving, adding, or deleting notes. For quick changes, you can also describe edits to the AI like "make it more jazzy" or "transpose up 3 semitones." Or just download the .mid and edit it in your DAW.
Midi AI uses OpenAI's GPT models with custom prompts trained for MIDI music generation. The AI understands music theory concepts like keys, scales, chord voicings, and rhythmic patterns.
Yes. Upload any .mid file and Midi AI will analyze the notes to detect the most likely key and scale. This is useful for matching new parts to existing tracks.
No. Credits are non-refundable and non-withdrawable. They have no cash value and can only be used for Midi AI services.
There's no native app yet, but Midi AI works in any mobile browser. You can add it to your home screen as a progressive web app for a native-like experience.
Email zach@midiai.app for any questions, bug reports, or feature requests. Response time is typically within 24 hours.
More questions? Contact us