Per-field controls
Camera, motion, lighting, and scene each get their own field. Edit one without touching the rest.
PromptForge
Structured JSON prompts for
AI video models.
PromptForge turns a one-line idea into a JSON prompt with explicit fields for camera, motion, lighting, and scene. Built for Veo 3, Runway, Sora, Pika, and Luma.
Free for the basics. Sign in for higher daily credit limits.
PromptForge
Veo 3 · 8s
prompt.json
01{02"model": "veo-3",03"duration": "8s",04"camera": {05"shot": "medium close-up",06"movement": "slow dolly in"07},08"scene": "rain on a neon street"09}
cameramotionlightingscene
Veo 3 · Runway · Sora · Pika · Luma
How it works
From a one-line brief to a JSON prompt you can paste anywhere.
PromptForge keeps every generation as a chain step, so you can compare versions, revert, or branch off without losing earlier work.
01
Start with a brief.
Type a one-line concept. PromptForge expands it into a starting JSON structure with sensible defaults.
02
Tune per field.
Adjust camera, motion, lighting, and scene independently. Each generation tracks as a step in the chain.
03
Copy or branch.
Copy the JSON into Veo 3, Runway, Sora, Pika, or Luma. Branch the chain to explore a variant without losing the original.
What you get
Six things PromptForge does, nothing it doesn't.
The actual feature list. No buried tier, no upsell path.
Valid JSON output
Returns a structured JSON object you can paste straight into a model. No manual cleanup.
Built for Veo 3
Templates are tuned for Veo 3 first, with field sets that also work with Runway, Sora, Pika, and Luma.
Chain history
Every generation lives in a chain. Compare versions, revert, or pick up where you left off.
Branching
Branch from any step to explore a variant without losing the original prompt.
Free with daily credits
30 daily credits for signed-in users. No card on file, no paywall on the basics.
FAQ
Common questions about PromptForge.
What does PromptForge produce?+
A structured JSON prompt with explicit fields for camera, motion, lighting, scene, and timing. You can paste it directly into a text-to-video model.
Which AI video models does it work with?+
Templates are tuned for Veo 3 first. The same JSON shape also works with Runway, Sora, Pika, and Luma, with minor field mapping where each model differs.
Do I need to sign in to use PromptForge?+
Yes. PromptForge Studio is gated to signed-in accounts because it persists your conversation chains. Sign-up is free and unlocks 30 daily credits.
What is a chain and what is branching?+
Every generation lives in a chain — a series of versions of a single prompt. You can iterate in-line, compare versions side by side, or branch from any step to explore a variant without losing the original.
How much does a generation cost?+
A full JSON generation costs 3 credits. Smaller refinements like a caption or hashtag rewrite cost 1 credit each. Daily limits reset at midnight UTC.
How is PromptForge different from Reeprompt?+
Reeprompt writes free-form video prompts from a short brief with platform presets baked in. PromptForge produces a structured JSON prompt with per-field controls for users who want the prompt as data they can save, version, and feed into a model.
Ready when you are
Brief in. JSON out.
Sign in and your chains save automatically. Pick up where you left off on any device.