Claude Prompt Optimizer

It transforms rough prompts into structured, Claude-specific prompts using XML tags, proper formatting, and anti-hallucination guardrails. Supports 6 target types including CLAUDE.md, SKILL.md, and Subagent prompts.

Claude was trained on XML-heavy data and follows XML tags more reliably than Markdown headings. Our tool auto-wraps your prompt in <role>, <task>, <constraints> tags for better performance.

CLAUDE.md files should contain fewer than 150 instructions. Beyond that, Claude Code performance degrades exponentially. Our tool counts instructions and warns you when you exceed the limit.

All optimization happens 100% in your browser. No data is sent to any server. Your prompts never leave your device.

The tool optimizes for Haiku (simplified), Sonnet (balanced), and Opus (enriched with chain-of-thought). Each tier adjusts the prompt complexity accordingly.