Free AI Video Prompt Generator
Type a rough idea, pick VEO 3.1 Fast, Kling 4.0, Seedance 2.5 or Hailuo 2.3, and get a detailed prompt written the way that model reads prompts, with tips for the best result. Then generate the video in one click.
Free, no sign-up. Auf Deutsch
How to write an AI video prompt
- 01
Pick the model
Choose VEO 3.1 Fast, Kling 4.0, Seedance 2.5 or Hailuo 2.3. Each one reads prompts differently, so the generator writes for the model you pick.
- 02
Write the idea
One line is enough: who, what happens, where. Add details you care about, such as a color, an object or a mood.
- 03
Set ratio and style
9:16 for TikTok and Reels, 16:9 for YouTube, 1:1 for feeds; then cinematic, photorealistic, UGC, product ad, anime or 3D.
- 04
Copy or generate
Copy the prompt to use anywhere, or press Make this video to open it in the Viralance studio with the same model already selected.
How each model reads a prompt
The generator follows these rules. Sample prompts for each model are below.
VEO 3.1 Fast4, 6, 8 s · with sound
Write one continuous shot in order: shot and camera, subject, action, setting, light, style. VEO makes sound, so finish with an "Audio:" line and put any dialogue in quotes after the speaker.
Medium close-up, slow push in. A barista in a denim apron pours steamed oat milk into a latte, forming a tulip. Warm morning light through a café window, shallow depth of field. Audio: milk hiss, cups clinking, soft café chatter. She smiles and says: "Best one today."
Kling 4.05, 10, 15, 30 s · with sound
Lead with the subject and its motion, then the scene, then the camera. Kling is strong at physics, so describe speed and direction of movement, and keep to one main action per clip.
A red kite surfer carves hard across turquoise water, spray arcing off the board as he lands a jump. Bright midday sun, wind-whipped waves. Tracking shot from a boat, low angle, then a slow orbit as he passes. Sound of wind and water.
Seedance 2.55, 10, 15, 30 s · with sound
Seedance can cut between shots inside one clip. Number the shots and repeat the same character description in each one so the person stays consistent across cuts.
Shot 1: Wide shot, a woman in a yellow raincoat runs to a bus stop in heavy rain. Shot 2: Close-up, the same woman in the yellow raincoat laughs as the bus pulls away without her. Shot 3: Medium shot, she opens a red umbrella and starts walking. Sound: rain, distant traffic.
Hailuo 2.36, 10 s · silent
Hailuo makes silent clips with strong physics and anime. Describe motion and material in detail and place camera moves as bracketed commands where they happen.
A paper boat drifts down a rain-filled street gutter, water spilling over its folded edges. [Tracking shot] following beside it, [Push in] as it spins into a small whirlpool near a drain. Overcast light, wet asphalt reflections, photorealistic.
The anatomy of a good prompt
Most strong prompts answer the same six questions: how the camera sees it (shot size, lens, movement), who or what is in frame, what happens, where it happens, how it is lit, and what it should look like. Models with sound add a seventh: what we hear.
Keep one clip to one idea. If the story needs several moments, either use a model that cuts between shots, such as Seedance 2.5, or make several clips and join them in the Film Studio.
Frequently asked questions
What is an AI video prompt generator?
It turns a short idea into a detailed text-to-video prompt: camera, subject, action, setting, lighting, style and, for models with sound, audio. Detailed prompts give AI video models less to guess, so results are closer to what you pictured.
Why does the prompt change with the model?
Models are trained to read prompts differently. VEO 3.1 Fast follows a single shot with an audio line, Seedance 2.5 can follow numbered shots with cuts, Kling 4.0 responds well to explicit motion and camera verbs, and Hailuo 2.3 takes bracketed camera commands and makes no sound.
Is the prompt generator free?
Yes, with no account. A fair-use limit of 5 prompts per 10 minutes and 20 per day for each visitor keeps it free. Generating the video itself uses credits in the Viralance studio, and new accounts get free credits to start.
Why are the prompts in English?
The video models follow English prompts most reliably, so the prompt is written in English even on the German page. Dialogue inside the prompt can still be in another language.
Can I use these prompts in other apps?
Yes. The prompt is plain text you can paste anywhere that runs these models. In Viralance, Make this video opens it with the model already selected.
How long should a video prompt be?
Roughly 60 to 140 words for one clip. Shorter prompts leave too much to chance; much longer ones start to contradict themselves. Clip length matters too: an 8-second VEO clip fits one action and one short line of dialogue.
More free tools
- AI Hook GeneratorTen scroll-stopping opening lines for TikTok, Reels and Shorts.
- Caption & Hashtag GeneratorThree captions plus a mix of broad, niche and specific hashtags.
- Aspect Ratio CalculatorPixel sizes per platform, safe zones and resize math.
- Virality PredictorAn AI read on your hook, retention risks and edits before you post.