AI & Prompts tools

3 free online tools in AI & Prompts: Build and check prompts, and count real tokens, no API key, no LLM call. Runs in your browser, no sign-up.

• Prompt Builder: Assemble a well-structured prompt from role, task, context, constraints and examples.
• Prompt Analyzer: A rule-based checklist against known prompt-engineering advice -- not an AI call.
• Token Counter: Count a prompt's real tokens (OpenAI's cl100k_base tokenizer, run locally) against common context windows.