AI Builder
Token counts, RAG chunks, fine-tune datasets, model files, prompts and MCP configs. 9 free tools that run 100% in your browser.
- Token Counter: Count tokens with the real GPT-4o, GPT-4, Llama 3, Mistral, Qwen, Gemma or DeepSeek tokenizer, see each token, context use and cost.
- RAG Text Chunker: Split documents into overlapping chunks by characters, words or tokens for embeddings and RAG, then export JSONL, JSON or CSV.
- Fine-tune Dataset Checker: Validate a JSONL fine-tuning file line by line: roles, empty replies, duplicates, token limits, then download clean train and validation splits.
- Dataset Format Converter: Convert fine-tuning data between OpenAI chat JSONL, ShareGPT, Alpaca, prompt and completion, and CSV, with an optional system prompt.
- GGUF & Safetensors Inspector: Read a GGUF or safetensors model header: architecture, quantization, context length, parameter count, tokenizer and every tensor, without loading the weights.
- Prompt Template Filler: Turn {{variables}} in a prompt into a form, fill it live, or fill it from a CSV to make many prompts or a batch JSONL file.
- MCP Config Builder: Build Model Context Protocol server configs for Claude Desktop, Cursor, VS Code, Windsurf, Claude Code and Gemini CLI, or convert one app's config to another.
- Embedding Playground: See how an AI embedding model measures meaning: a similarity grid, the closest pairs, a 2D meaning map and search, all on your device.
- LLM Stream Viewer: Paste a streamed or plain LLM API response (OpenAI, Anthropic, Gemini, Ollama) and get the full text, reasoning, tool calls and token usage.