Multimodal Prompt Structure
When combining text, images, and documents, the model needs explicit instructions about how to relate each input type. Promptuner flags under-specified cross-modal instructions before they produce confused outputs.
Gemini Prompt Optimizer
Gemini Prompt Optimizer for Developers
Gemini handles text, images, and documents — which means prompt structure is more important, not less. Promptuner scores your Gemini prompts in real-time and refactors them inside gemini.google.com.
Works inside gemini.google.com·10,000+ engineers
Beforescore 2/10
“analyze this image and tell me about it”
2/10
After Promptunerscore 9/10
“You are a data analyst. Examine the attached chart. Identify: the trend direction, any outliers, and the single most significant data point. Respond in structured JSON with keys: trend, outliers, highlight.”
9/10
// How It Works
Three steps. Zero friction.
01
Write your prompt
Type directly inside your AI tool — Promptuner activates automatically.
02
See the live score
A quality score from 1–10 appears in real-time as you type, no clicks needed.
03
Refactor in one click
Hit the Enhance button. Promptuner rewrites your prompt and the score jumps.
// Why it matters
Built for how you use Gemini
Google Workspace Integration
Prompts inside Workspace — Docs, Sheets, Gmail — often repeat context Gemini already has. Promptuner scores redundancy and flags what can be cut without losing precision.
Grounding Instruction Precision
Vague prompts produce over-broad grounding with too many sources and diluted answers. High-scoring prompts produce targeted citations from authoritative, relevant sources.
Free Chrome Extension
Score your Gemini prompts before you send them.
Install once. Works inside gemini.google.com automatically — no copy-pasting, no tab switching.
Install Free — Chrome Web Store