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Developer utilities

Context Window Calculator

Visualize and calculate context window utilization across system prompt, conversation history, RAG retrieved documents, and tool definitions. Identify what percentage of your available context window is consumed by each component and optimize for maximum effective context.

Run Context Window Calculator Interactively 100% client-side execution in your browser. Zero data retention.
Open Interactive Tool

What Problem Context Window Calculator Solves

Production AI deployments require predictable token economics, rigorous parameter verification, and deterministic schema handling. Context Window Calculator isolates parameters client-side before payloads hit third-party foundation model APIs.

Primary Production Use Cases

  • Plan context budget for long-running agent
  • Ensure RAG documents fit within context window

Security & Data Privacy Considerations

All computations execute locally in browser memory. No prompt payloads, test inputs, or secret credentials are ever retained or stored on central servers.

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