What does Markdown Prompt Builder Online do?

Markdown Prompt Builder Online is a browser-based AI-prompt utility. It analyses, transforms, formats, or costs your prompt entirely client-side — no OpenAI/Anthropic key needed, no data ever sent to a language model.

Does Markdown Prompt Builder Online call a language model or API?

No — Markdown Prompt Builder Online is a static analyser. It uses local heuristics (token counting, quality scoring, format rewriting) so you can iterate on prompts privately without spending API credits or leaking proprietary prompt IP.

Which AI models does Markdown Prompt Builder Online cover?

Markdown Prompt Builder Online covers the current-generation models: OpenAI (GPT-4o, GPT-4o mini, o1, o3), Anthropic (Claude 3.5 Sonnet, Haiku, Opus), Google (Gemini 1.5 Pro, Flash), and popular image models (DALL-E 3, Midjourney, Stable Diffusion, Flux).

How accurate is the token count from Markdown Prompt Builder Online?

Markdown Prompt Builder Online uses a client-side tokeniser calibrated to OpenAI's tiktoken (cl100k_base) and Anthropic's Claude tokeniser. Token counts are within 1-2% of the official API result — accurate enough for cost estimation and context-window planning.

Is my prompt private when I paste it into Markdown Prompt Builder Online?

Yes. All prompt analysis runs in your browser — the text is never uploaded, logged, or shared with a language-model provider. Safe to use with proprietary system prompts and confidential instructions.

Is Markdown Prompt Builder Online free and unlimited?

Yes — no signup, no rate limits, no premium tier. Use it as much as you like on any device.

Markdown Prompt Builder Online

Build structured Markdown prompts with role, objective, steps, format, and constraints sections. Free, no signup.

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