Veo3 JSON generator

What is Google Veo 3?

Google Veo 3 is the third-generation generative-video system from the team behind Gemini and Imagen. It translates richly structured prompts into eight-second, 16∶9 video clips complete with spatial audio. Unlike earlier text-only models, Veo 3 understands how a camera moves, how light behaves, and how speech should sync to a subject's lips. The result is footage that feels cinematic instead of synthetic.

Why JSON prompting?

Veo 3 is able to parse natural language, but professional creators quickly discovered that a structuredJSON payload gives considerably more control. Rather than writing a single, sprawling sentence you define discrete keys for the shot, subject, scene,audio, and visual rules. Each key can be tweaked independently, allowing precise iteration without rewriting the entire prompt. Our in-depth tutorial (JSON Prompting for Veo 3 – Hacks & Tricks) walks through dozens of production-ready examples.

Minimum viable JSON template

{
  "shot": {
    "composition": "medium tracking shot, handheld",
    "camera_motion": "slow dolly in",
    "frame_rate": "24fps"
  },
  "subject": {
    "description": "young explorer wearing a red jacket",
    "action": "walks toward camera then smiles"
  },
  "scene": {
    "location": "misty mountain ridge at sunrise",
    "environment": "low-hanging clouds, warm sunlight"
  },
  "audio": {
    "ambient": "soft wind", "music": "gentle strings"
  },
  "visual_rules": {
    "prohibited_elements": ["text overlays", "lens dirt"]
  }
}

Paste the above into Veo 3's prompt panel and adjust individual keys until the clip matches your vision. Want wider framing? Change composition. Need evening lighting? Swapsunrise for golden hour. Because each field is independent you can iterate ten times faster than with conventional prose-prompts.

Advanced controls

• Timeline markers – Define a timeline object for second-by-second actions. Useful for music videos or choreographed scenes.
• Negative prompting – Populate visual_rules.prohibited_elements to ban artefacts like motion blur or cartoonish textures.
• Image guidance – Add a config.input_image plus animage_influence scalar (0-1) to lock characters or colour palettes.