Structure Long Contexts Efficiently
Claude's 200K context window is its advantage — but unstructured context is wasted context. Promptuner scores density so Claude spends its capacity on reasoning, not parsing noise.
Claude Prompt Optimizer
Write Longer, Smarter Claude Prompts
Claude thinks in context. Promptuner helps you build that context efficiently — scoring density, persona clarity, and output constraints in real-time directly inside claude.ai.
Works inside claude.ai·10,000+ engineers
Beforescore 1/10
“summarize this document”
1/10
After Promptunerscore 9/10
“You are an expert technical writer. Summarize the document below in exactly 3 bullet points. Focus on: key decisions, identified risks, and next steps. Max 50 words per bullet.”
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 Claude
Consistent Persona Across Long Conversations
Claude degrades toward generic responses when the initial role instruction is weak. Promptuner enforces persona clarity at the prompt level, keeping Claude on track across long threads.
Reduce Instruction Repetition
High-scoring prompts front-load all constraints clearly, eliminating the need to repeat yourself mid-conversation and keeping context clean for the reasoning that matters.
Free Chrome Extension
Score your Claude prompts before you send them.
Install once. Works inside claude.ai automatically — no copy-pasting, no tab switching.
Install Free — Chrome Web Store