AI & Prompts — 13 Free Online Tools
Free, browser-based ai & promptstools on Toolpile. No signup, no file uploads — everything runs locally on your device.
Prompt Engineering
- Chain of ThoughtBuild step-by-step reasoning prompts
- Chat Format ConverterConvert chat messages between ChatML, Alpaca, ShareGPT, Llama 3, Claude XML, OpenAI, and Anthropic API formats.
- ChatGPT Prompts & AI Personas LibraryFree library of 1,384 ChatGPT prompts and AI personas. Copy ready-made prompts for ChatGPT, Claude, Gemini, and Llama — searchable by category, no signup.
- Few-Shot BuilderBuild few-shot example prompts
- Persona GeneratorBuild a custom AI persona with role, audience, tone, and rules. Generates a ready-to-paste system prompt for any LLM.
- Prompt BuilderAI prompt builder to design structured prompts for ChatGPT, Claude, and Gemini. Build reusable prompt templates with clear context, instructions, and constraints
- Prompt CompressorShrink verbose prompts with rule-based compression. See token savings and estimated API cost reduction instantly.
- Prompt DiffWord-level diff between two prompt versions. Ideal for A/B testing prompt iterations before running them.
- Prompt OptimizerAnalyze and score your prompts
- Prompt TemplatesLibrary of ready-to-use prompts
- Structured Output BuilderDesign a JSON schema visually and export as OpenAI function, Anthropic tool definition, JSON Schema, or a system prompt.
- System PromptBuild AI assistant personas
- Token CounterCount tokens and estimate API cost for GPT-5, Claude 4, Gemini 2.5, and Llama across providers in real time.
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