Write better prompts. Get better results.
Free tools to analyze, optimize, and master your AI prompts. Works with ChatGPT, Claude, Gemini, and any LLM.
Prompt Engineering Toolkit
Everything you need to write effective prompts, all in one place.
Prompt Linter
Paste any prompt and get instant feedback on clarity, specificity, and common anti-patterns. Like ESLint for your prompts.
Template Library
Curated, tested prompt templates for writing, coding, business, marketing, and more. Copy, customize, and use.
System Prompt Builder
Guided wizard to craft production-quality system prompts for your AI features. Covers guardrails, formatting, and edge cases.
Prompt A/B Tester
Compare prompt variants side-by-side. See which version scores higher on clarity, specificity, and best practices.
Token Counter
Count tokens for GPT-4o, Claude, Gemini, and more. See context window usage and cost estimates.
Prompt Snippets
Save, tag, and organize your prompt library. Quick copy, search, export, and import.
How It Works
Paste your prompt
Drop any prompt into the linter or start from a template.
Get instant feedback
See what's working, what's missing, and how to improve.
Get better results
Use your refined prompt with any AI model for better outputs.