Free Veo 3 JSON Prompt Generator

Power users get the most consistent results from Veo 3 and Veo 4 by sending a structured JSON prompt instead of one long sentence. This free Veo 3 JSON prompt generator builds a clean, well-formatted JSON object — subject, action, camera, lighting, mood, style, color palette, audio and a negative prompt — so the model knows exactly which knob to turn. Everything runs in your browser: no login, no limits, no cost.

Fill in the fields you care about and leave the rest blank — empty values are pruned automatically. Copy the JSON or download it as a .json file to reuse across shots and keep your prompt library organized.

{
  "subject": "a lone traveler",
  "camera": {
    "shot_type": "medium shot",
    "motion": "slow push-in",
    "lens": "35mm"
  },
  "lighting": "golden hour",
  "mood": "cinematic",
  "style": "photorealistic"
}

Tip: structured JSON gives Veo 3 / Veo 4 tighter control. Need plain-language prompts instead? Try the Veo 3 prompt generator.

How to use this tool

  1. Enter your subject, action and setting in plain language.
  2. Pick the camera, lens, lighting, mood and style from the dropdowns.
  3. Add an optional color palette, audio direction and negative prompt.
  4. Copy the JSON or download the .json file and paste it into Veo 3 / Veo 4.

Frequently asked questions

Why use a JSON prompt instead of plain text?
Structured JSON separates each instruction into its own field, so Veo 3 and Veo 4 are less likely to blend or ignore details. It is also easier to version, reuse and tweak one parameter at a time without rewriting the whole prompt.
Does Veo 3 officially accept JSON prompts?
Veo reads natural language, but creators have found that a JSON-style structure reads cleanly and improves adherence to camera, lighting and negative-prompt instructions. It also works well with Sora, Kling and other AI video models.
What about audio and negative prompts?
Add a short audio description here, then fine-tune dialogue and sound design with our Veo 3 audio & dialogue prompt builder. For the negative field, use the AI video negative prompt generator to assemble a strong list of artifacts to avoid.

Related free tools

Veo 3 Prompt Generator
Build cinematic Veo 3 prompts from camera, lighting & style controls.
Negative Prompt Generator
Pick the artifacts to avoid and get a ready negative prompt.
Veo 3 Prompt Examples
Copy-paste prompt examples across cinematic, product, ASMR & more.

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