Free Tool

Free AI Video Prompt Generator

Shape clips that actually move: combine scene beats, subject motion, camera grammar, pacing and grade in one structured JSON prompt. Great for Veo-class, Runway, Kling, Luma and similar text-to-video tools — then refine with AI in one click.

Build Cinematic Video Prompts in 3 Steps

  1. Describe the scene — what we see and what should unfold over a few seconds.
  2. Add keyword chips for motion, camera, pacing, mood and grade (1–3 per category usually beats stuffing).
  3. Copy the JSON into your generator or hit Generate with AI to polish or extend it.
0 keywords selected

Select keywords below to build your structured JSON prompt…

Ready to generate AI video?

Paste your prompt into VAKPixel's video flow or browse motion presets for inspiration.

Video presets

Why Motion Grammar Matters in AI Video

Still-image prompts reward detail; video prompts reward change over time. Naming camera behavior, pacing and continuity gives models a shot plan instead of a snapshot.

Quick checklist

  • Anchor the opening frame, then describe what moves first.
  • Pair subject motion with camera motion (match energy or contrast it).
  • Add lighting and grade cues that stay coherent across frames.
  • Note loop or ending beat if you need social-ready repeats.

Related

Frequently Asked Questions

What makes a good AI video prompt?

Combine scene subject, motion beats, camera grammar, pacing and mood. Vague adjectives produce vague clips; shot language produces intentional motion.

Can I refine prompts with AI here?

Yes — open Generate with AI to create or edit a prompt using the same structured JSON as context.