🤖 Free Runway Prompt Generator

Writing a good prompt for RunwayAI isn’t just about what you say—it’s about clarity. A vague or overly complex prompt leads to poor results, wasting time and effort.

The challenge? Finding the right balance. Too much detail, and the AI gets confused. Too little, and it misses the mark.

The AI Runway Prompt Generator solves this. It helps you create clear, precise prompts that get the results you want. No guesswork, no wasted time—just better videos.

What Is Runway Prompt Generator?

The AI Runway Prompt Generator is a tool that helps users create clear, effective prompts tailored to work with RunwayAI. By analysing your inputs, the tool generates structured prompts that guide the AI in producing videos that match your vision. It simplifies the process of developing the right description for the AI, ensuring that your creative ideas are communicated precisely, which helps the AI deliver better results.

Rather than spending time fine-tuning vague or overly detailed descriptions, users can rely on the generator to structure their ideas in a way that aligns with RunwayAI’s capabilities.

Imagine you start with a simple idea—like "a knight in a forest." The generator can take that basic concept and turn it into something much more detailed:

"A lone knight, clad in weathered armor, standing in the heart of an ancient, mist-covered forest, with towering trees casting long shadows. The scene is captured in a wide shot, with a soft, ethereal light filtering through the dense canopy above, and the faint sound of distant thunder rolling in. The atmosphere is tense, with a sense of looming danger, rendered in a dark fantasy style with hyper-realistic lighting and rich textures." 

This expanded prompt gives the AI all the necessary details, ensuring the generated video aligns closely with your vision.

How Does the Runway Prompt Generator Work?

The AI Runway Prompt Generator simplifies the process of creating detailed and effective prompts by breaking it down into three clear steps:

Input

To generate a precise prompt, the AI relies on four key details:

• Main Subject – This defines what the video is about. A subject like a knight or a robot gives the AI a clear starting point. Without a well-defined subject, the output may be too vague or unrelated to your vision.
• Action or Behavior – The AI needs to understand what the subject is doing. Descriptions like riding a horse or fighting an enemy help create dynamic, engaging videos. If this input is missing, the subject may appear static or lack purpose.
• Setting & Atmosphere – Where and how the scene unfolds matters. A setting like a dark, foggy forest or a futuristic city at night shapes the overall mood. This input influences lighting, color schemes, and even minor background details, ensuring consistency in the final video.
• Additional Details – Extra instructions refine the output. Specifications like highly detailed textures or cinematic lighting help control the artistic and technical quality. Without these details, the AI defaults to a general style that may not match your expectations.

Processing

The AI has been trained on a vast database of text-to-video prompts, learning patterns from thousands of examples. This training allows it to recognise effective prompt structures and generate clear, detailed descriptions.

Once you enter your inputs, the AI processes them using Natural Language Processing (NLP) to understand the relationships between words and extract key details. It then applies generative AI models to format the information into a structured prompt. These models ensure the prompt is detailed, coherent, and optimised for RunwayAI, combining the subject, action, setting, and additional instructions into a single, well-formed description.

Output

The AI generates a ready-to-use prompt that you can copy and use immediately. The output is designed to be clear, structured, and aligned with your inputs. If the first result doesn’t match your expectations, you can adjust your inputs and generate a new version. There’s no limit to how many times you can refine your prompt. Each adjustment helps the AI learn and improve its ability to interpret your preferences over time, leading to better results with continued use.

How to Use the Runway Prompt Generator ?

The AI Runway Prompt Generator helps you create clear and precise prompts for your video projects. Follow these steps to get accurate results.

Step 1: Who or what is in the scene?

This input defines the main subject of your scene. The AI needs specific details to generate an accurate image. Simply saying "a person" or "an object" won’t provide useful results. Instead, describe exactly who or what should appear.

Correct way to provide input:

• Be specific about the character or object. Instead of "a knight," describe their appearance:
  Example: A medieval knight in full armor, with a red cape and a dented helmet
• If it's an object, clarify its characteristics:
  Example: A rusty sword lying on an ancient stone pedestal

Tips

• Use descriptive details. Instead of "a cat," specify a black cat with glowing yellow eyes sitting on a windowsill.
• Make the subject clear. Avoid vague terms like "someone" or "a thing."
• If multiple subjects exist, list them concisely. Example: A pirate captain and a frightened sailor on a stormy deck.

Do’s and Don’ts

• Clearly define the character, animal, or object.
• Add defining features (size, color, expression, attire)
• Avoid generic words like "man," "woman," or "creature."
• Don't overload with unnecessary adjectives. "A tall, strong, brave, fearless knight with shiny, polished, reflective armor" is excessive.

Step 2: What is the subject doing?

This input describes the action happening in the scene. The AI uses this to determine movement, posture, and interaction with the environment. A vague action will result in a weak output.

Correct way to provide input:

• Use strong action verbs to define movement clearly.
  Example: The knight raises his sword, preparing to strike a dragon.
• If the action involves multiple steps, keep it concise but structured.
  Example: A painter dips a brush into red paint before applying it to a canvas.

Tips:

• Use active verbs. Instead of "is in a fight," say "clashing swords with an enemy."
• Describe the movement’s intent. Instead of "running," say "sprinting through a dense jungle, dodging branches."
• Include interaction with the surroundings when relevant. Example: A scientist adjusting a microscope in a dimly lit laboratory.

Do’s and Don’ts:

• Use clear, visual actions.
• Include relevant context that adds meaning.
• Avoid passive phrases like "being attacked" or "is doing something."
• Don’t make it overly complex. "A knight in golden armor swiftly unsheathes his sword, parries an incoming strike, spins, and lunges at his enemy" is too much for a single prompt.

Step 3: Where is the scene taking place?

The setting adds context to your prompt, giving the AI a backdrop to generate visuals. A strong setting makes a big difference in how the final image turns out.

Correct way to provide input:

• Define the specific location with key details. Instead of "a forest," describe its characteristics:
  Example: A dense foggy forest with twisted trees and glowing mushrooms on the ground.
• If the location has an important atmosphere, include it:
  Example: A ruined temple, covered in vines, with sunlight filtering through cracks in the stone ceiling.

Tips

• Think about lighting and weather. Instead of "a battlefield," say "a battlefield at dusk, with torches lighting the foggy air."
• Use distinct features. A "city" could be anything. Instead, specify: A futuristic neon-lit city with flying cars and holographic billboards.
• If indoors, describe the setting’s style. Example: A cosy wooden cabin with a fireplace and bookshelves lining the walls.

Do’s and Don’ts:

• Specify time of day, weather, and mood when needed.
• Mention key environmental elements like structures, terrain, or objects.
• Avoid generic locations like "outside" or "somewhere dark."
• Don’t overcomplicate. "A post-apocalyptic city, crumbling skyscrapers covered in ivy, abandoned cars on cracked roads, a storm looming in the distance" is too much for one prompt.

Step 4: Any other details or instructions?

This is where you refine the visual style, composition, and mood of the scene. The more relevant details you add, the better the AI can align with your vision.

Correct way to provide input:

• If you want a specific shot type, mention it:
  Example: Wide-angle shot, slightly tilted camera angle for a dramatic effect.
• Describe the mood or artistic style if important:
  Example: Dark and moody, inspired by gothic horror paintings.

Tips:

• Use film terms if applicable. Example: Aerial view of a medieval battle, with smoke rising from the battlefield.
• Add special effects only if essential. Example: A sorcerer casting a fire spell, with embers floating in the air.
• Keep it brief but precise.

Do’s and Don’ts

• Use concise descriptions for composition and effects.
• Mention if a specific shot type or angle is needed.
• Avoid unnecessary adjectives that don’t add value.
• Don’t include conflicting ideas. "Bright and dark atmosphere" is unclear.