Draft Gemini-style prompts without calling Gemini
Persona templates, mustache variables, a local text diff, and token estimates from published Gemini 1.5 rates. Export TypeScript, Python, or cURL you run yourself. This page does not send a prompt to Google.
Visual Prompt Architect & Token Engine
Draft personas, interpolate variables, compare text locally, and estimate token cost from published rates. No request is sent to Google.
Dynamic Context Variables (Mustache Syntax)
Use {{variable_name}} anywhere in your prompts for live interpolation.
Few-Shot Input / Output Examples (1)
Guide deterministic output structure using in-context few-shot turns.
Visual Persona Architect
Break complex multi-turn prompts into discrete system instructions, context variables, and structured response schemas with real-time token budgeting.
Side-by-Side Diffing
Compare two drafts of the same prompt in the browser. This diff does not measure model accuracy or latency.
Deterministic Output Schemas
Attach a JSON schema to the draft and export it with the SDK snippet. The workbench does not run the model or validate a live response.
Supported Integrations & Engines
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