Eliminate Token-Wasting Hedges
Vague prompts force the model to hedge, generating longer outputs and higher costs. Promptuner compresses your context to the essential signal before you spend a single token.
ChatGPT Prompt Optimizer
Optimize Your ChatGPT Prompts, Cut Token Waste
Promptuner injects a live quality scorer directly into the ChatGPT interface. Every prompt gets scored before it leaves your browser — role, context, output spec, and failure handling all measured in real-time.
Works inside chat.openai.com·10,000+ engineers
Beforescore 2/10
“fix this function”
2/10
After Promptunerscore 9/10
“You are a senior TypeScript engineer. Identify and fix the performance issue in the function below. Respond with: issue found, severity (1–3), corrected code with inline comments.”
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 ChatGPT
System Prompt Optimization
Poorly structured system prompts compound costs across every API request. Promptuner flags weak role definitions and missing output constraints — the two biggest sources of cost inflation.
First-Try Accuracy
The average developer sends 2–3 follow-up messages to get a useful response. A prompt that scores 9/10 gets there on the first try — Promptuner makes that score visible before you hit Enter.
Free Chrome Extension
Score your ChatGPT prompts before you send them.
Install once. Works inside chat.openai.com automatically — no copy-pasting, no tab switching.
Install Free — Chrome Web Store