AI & LLM
Tools for working with language models: count tokens, calculate costs and see how your text is split. Deterministic and in your browser, with no API calls.
3 tools
LLM Token Counter & AI Cost Calculator
Count the tokens in your text or prompt and estimate the cost across GPT-5, Claude, Gemini, Kimi K3, Grok and DeepSeek. Exact OpenAI counting, per-call and monthly costs, with prompt caching.
OpenMCP Server Picker for SEO and GEO
Filter 21 SEO and GEO MCP servers by the data you need, whether they are free and whether they need installing, then copy the config for Claude Code, Claude Desktop, Cursor or Codex.
OpenTokenizer Visualizer
Paste text and see exactly which tokens a language model splits it into, with their IDs. Check why Spanish costs more tokens than English.
Open