Structured prompts get you repeatable results: change the lens, keep the scene. Fill the fields (or let ✨ AI fill draft them from one line), then copy as JSON or flattened prose. Works for Veo 3 and 3.1 — see the Veo 3 prompt library for ready-made examples.
Why structure a Veo 3 prompt as JSON?
- Iterate one variable at a time. Re-roll with a new camera_motion while everything else stays fixed — the only sane way to debug a prompt.
- Consistency across shots.Reuse the same subject and style fields across a sequence; only action and composition change. (Planning a sequence? That's what the Shot Planner does.)
- Native audio deserves real direction. Veo's lip-synced dialogue and diegetic sound are its signature — a dedicated audio block beats an afterthought sentence.
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Frequently asked questions
- Does Veo 3 officially require JSON prompts?
- No — Veo accepts natural language, and Google's docs use prose prompts. JSON prompting is a community technique: structuring subject, shot, lighting and audio as fields keeps complex prompts organized, easy to iterate one variable at a time, and repeatable across shots. Our builder outputs both the JSON and a flattened prose version, so you can use whichever performs better for your scene.
- What fields matter most in a Veo 3 prompt?
- Subject and action carry the most weight, followed by camera language (composition, motion, lens) — Veo responds unusually well to real cinematography terms. Because Veo generates native audio, the dialogue/sfx/music fields are worth filling: quoted dialogue with a speaker note reliably produces lip-synced speech.
- How does the ✨ AI fill work?
- Type a one-line idea and an LLM tuned on cinematography conventions fills all thirteen fields, which you can then edit. It runs on our infrastructure, free, limited to 10 enhancements per day per user.
- Do these prompts work on Seedance or Kling?
- The prose version transfers well. Seedance prefers a flowing three-block paragraph — use our Seedance prompt generator for that format, or the Shot Planner to plan a whole multi-shot piece.