Prompt Template Builder

Build reusable AI prompts with {{variable}} placeholders. This prompt template builder auto-detects your variables, generates an input field for each, and live-renders the finished prompt as you fill them in - so you can craft a prompt once and reuse it with different inputs in seconds.

Save templates directly on your device (via a cookie, not an account), and export or import them as JSON to share with teammates or back them up. Duplicate variables are merged and empty ones render cleanly, so the output is always predictable. Everything runs in your browser with no signup and no network calls, and it works offline once loaded. Copy the filled prompt straight into ChatGPT, Claude, or your own app.