Idea in, viral video prompt out. Pick a niche, a character and a style and you instantly get a timestamped master prompt for Veo, Sora, Kling or any video model, free and with no AI run needed. One click on “Make it brilliant with AI” turns it into a richer, original version.
A worked example
Choices: Niche: Cute animals & pets · What happens: “A tiny kitten tries to guard a giant watermelon from a curious goose” · Main character: a fluffy orange kitten with a white chest and oversized green eyes · Setting: a sunny farmhouse backyard · Style: hyper-realistic cinematic · 30 seconds · 9:16 · Veo 3.
Master prompt (first beats): Hyper-realistic cinematic vertical video, 9:16, golden-hour light, shallow depth of field, gentle handheld feel. CHARACTER: a fluffy orange kitten with a white chest and oversized green eyes. SETTING: a sunny farmhouse backyard with a wooden fence and a giant striped watermelon on the grass. [00:00-00:03] HOOK: extreme close-up of the kitten’s eyes widening as a long white neck enters the frame. [00:03-00:08] Wide shot: the goose waddles towards the watermelon; the kitten leaps on top of it and puffs up its fur. [00:08-00:15] The goose honks; the kitten answers with a tiny hiss and a paw swipe that misses completely…
The full result continues to the 30-second payoff, then adds sound design and music direction and the rules that keep the kitten looking the same in every shot.
How to use it
- The idea. Choose a niche, or press Surprise me. Write what happens in one line and pick a hook style. A good hook shows something surprising in the first two seconds.
- Characters and place. Describe the main character with colours, size and one memorable detail, then the setting. The more specific you are, the more consistent the video.
- Look and format. Choose the visual style, length (8 to 60 seconds), aspect ratio (9:16 for Shorts, Reels and TikTok; 16:9 for YouTube), model and tone, and whether to include sound and music direction.
- Copy the live prompt. It updates as you type, free and instantly. Paste it into your video model.
- Optional: Make it brilliant with AI. Uses one AI run to write a richer, original version with stronger beats and camera direction.
Niches that work right now
Every niche in the builder has a page of fresh trending prompts you can study or remix: cute animals & pets, ASMR & satisfying, micro-dramas, comedy, horror & mystery, history, sci-fi and food & cooking. See them all on Trending.
Who it is for
- New faceless channels that need a steady supply of ideas in a proven format: faceless channel prompts.
- Shorts, Reels and TikTok creators: short-form video prompts and prompts for YouTubers.
- Brands and sellers making scroll-stopping product videos: ad prompts.
What it does not do
- It writes the prompt; it does not render the video. Run it in Veo, Sora, Kling or the model you chose.
- Most models make 5 to 10-second clips. For 30 or 60 seconds, generate the beats as separate clips with Script to Scenes, keeping the character text identical in each.
- It avoids real people, logos and copyrighted characters on purpose. Prompts that use them are often refused and can get videos removed.
- No prompt guarantees views. The hook, the first two seconds and posting consistently matter more than any single prompt.
Privacy
The instant prompt is built in your browser: nothing is sent anywhere. Only “Make it brilliant with AI” sends your choices to Google Gemini for that one request, and nothing is saved on PromptifyLab.
Tools that go before and after
- Video to Prompt: learn the format from a video you admire first.
- Script to Scenes: split a long video into model-sized clips.
- YouTube Title & Hook Generator: the title, hook and description for publishing.
Questions
Is the Viral Video Prompt Builder free?
Yes. The live prompt is free and unlimited because it is built in your browser. The optional AI upgrade uses one of your free daily AI runs, or unlimited runs with your own Gemini key.
Which video models is it for?
Google Veo 3 and 3.1, OpenAI Sora 2, Kling, Seedance, Grok Imagine, Runway Gen-4, Hailuo, Pika and Wan, or a universal prompt.
How do I keep the same character in every clip?
Paste the exact same character description at the top of every clip’s prompt, keep the setting and lighting words identical, and change only the action.
What length should I choose?
For Shorts, Reels and TikTok, 15 to 30 seconds with a payoff at the end usually performs best. Veo makes 8-second clips, so a 30-second video is about four clips.