Prompt Improver · Local AI

Text to Prompt

Paste an existing prompt and the local AI rewrites it with cinematic detail — sharper subject, camera, lighting and style, in seconds.

🔒 Everything runs on your device — your video, images and ideas never leave it. The model downloads once, then works offline.

Choose your engine

🌐 The prompt is written in the same language as your idea.
📝 Start from an idea instead? Generate a fresh prompt →
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Your improved prompt will appear here.

Why local generation

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Total privacy

Your ideas and prompts never leave your device. No uploads, no logs, no one watching. True for every single generation.

Free & unlimited

The model runs on YOUR hardware, so there's no server bill for anyone. No API keys, no quotas, no paywalls — generate 100 prompts a day.

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Works offline

After the one-time download, the model lives in your browser cache. Turn off Wi-Fi and it still generates — airplane mode, no problem.

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Your data is yours

No account, no email, no analytics on your prompts. The model has no idea who you are — and neither does anyone else.

Local vs. Cloud — where your content goes

Hand your ideas to a cloud tool and they live on a server you can't see. A local model keeps every choice — and every word — with you.

VideoPrompt — on your deviceTypical cloud tools
Your content✓ Never leaves your device✗ Uploaded to their servers, then out of your control
Privacy✓ Zero risk — no server ever sees it✗ May be stored, analyzed, or used for AI training (check their terms)
Works offline✓ Yes — after the one-time download✗ No — needs a connection
File size limits✓ None✗ Common: 50–100MB caps
Account & email✓ Not needed✗ Usually required

Frequently Asked Questions

Q: What's the difference between generating and improving a prompt?

Generating starts from a rough idea and writes a brand-new prompt. Improving takes a prompt you already have and rewrites it with more cinematic detail while keeping your original intent — perfect when a prompt is vague, too short, or isn't giving you the results you want.

Q: Do I need to pay or create an account?

No. Generation runs on your device, so there are no server costs for us to cover. No account, no email, no API key, no subscription. Every feature on this page is free forever.

Q: What hardware do I need?

Any modern desktop browser with WebGPU: Chrome or Edge (recommended), Firefox Nightly. Most laptops from 2020+ handle the Fast and Balanced tiers; the Best tier (3B) prefers a dedicated GPU. On phones, choose the Fast tier.

Q: Why does the model need to download 1GB?

The language model's weights must exist on your device to run without a server. Think of it as installing an app: once. After that, the browser cache serves it instantly, and you can pick a smaller tier (430MB) if you prefer. Note: clearing your browser cache removes the model — you'll download it again.

Q: Can I use the prompts commercially?

Yes. Prompts generated on your device are yours — the underlying model (Qwen2.5) is open-weight under the Apache 2.0 license. Use them for client work, marketing videos, or anything else.