Free AI music prompt generator
Pick a genre, a mood, a few instruments and a vocal, and this tool writes a prompt the way a producer would brief a session: tempo, drums, bass, harmony, lead sounds, vocal character and mix. It runs in your browser, needs no account, and the result works in any text-to-music tool.
Pick up to five.
Full brief
Short version
Under 200 characters, for tools with a small style box.
How to write an AI music prompt that worksSix rules
- Name the genre and the era“Early 2000s garage rock” gives a model a sound to aim at; “rock” gives it a category. The music models’ own prompt guides and hundreds of r/SunoAI threads agree on this one.
- Name instruments, not qualities“Rhodes, upright bass, brushed drums” are three sounds a model can play. “Sophisticated and elegant” are none.
- Say who sings and howFemale or male, breathy, raspy, belted, whispered.
- Four to seven words, all pointing the same wayFewer and the model fills the gaps with its most generic choices; past about ten it starts ignoring the last ones. “Upbeat” plus “melancholic” makes it do both halfway: say “bittersweet”.
- Describe the room in words, not numbersModels do not read numbers such as “30% reverb” or “-6 dB”. Words such as “huge hall reverb”, “deep bass” or “warm tape” are what they follow.
- Leave artists outDescribe the sound instead of naming a performer. Most tools block names anyway, and the description is what you can reuse.
Prompts by genre
Eight ready-made prompts for every genre, with tempo, key and instrument notes.
The style line and the rest, on video4:45
Questions
Does this prompt generator use AI?
No. It assembles a prompt from rules written by producers, so it is instant, free and private: nothing you pick leaves your browser. Inside Lyro there is an AI version that writes three takes from a sentence and drafts lyrics in twelve languages.
Will these prompts work in Suno or Udio?
Yes. They are plain English descriptions of a sound, which is what every text-to-music model reads. If the tool you use has a small style box, copy the short version. For where the prompt goes in Suno and which v6 settings keep it as written, see the Suno prompt generator.
Why include the BPM and key?
Tempo is the strongest single signal of genre, and a stated key keeps harmony consistent. Some models follow them exactly, others treat them as a strong hint. On Lyro both models treat them as a strong hint, so check the tempo of the result; when a track has to sit on your own vocal or beat, Lyro’s studio tools take the tempo and key from your file.
Can I put lyrics in the prompt?
Keep them separate. The prompt describes the sound; lyrics go in the lyrics box with section tags such as [Verse] and [Chorus]. Mixing the two makes models sing your instructions.
How long should a music prompt be?
Four to seven descriptors, under about a hundred words. That is the range r/SunoAI users converge on: past about ten descriptors the last ones get ignored. Put the most important words first.