HundredTabs Prompt Optimizer Free

Free browser-based prompt optimizer that rewrites your AI prompts using the ICCSSE framework. Paste any prompt → get an improved version with specific fixes for identity, constraints, specificity, structure, and examples. Works for ChatGPT, Claude, Gemini, and any other AI tool No signup. No API key. No cost. Runs entirely in your browser Also includes 23 other free AI tools: Model Picker, Cost Calculator, Prompt Grader, AI Readiness Quiz, Migration Checker, and more at hundredtabs.com/tools