Estimate text tokens
Paste plain text for a private character-based token estimate, word count, and context-window comparison.
Estimate tokens →Private AI planning tools
AI token and model calculators
Plan prompt size, API cost, and context capacity without connecting an account or uploading text. The calculators run locally and clearly separate estimates from official model limits.
What do you want to calculate?
Calculate API token cost
Price uncached input, cached input, and output tokens per request or across a larger request volume.
Calculate token cost →Check a context window
Reserve input and output tokens, calculate remaining capacity, and catch context or maximum-output overflows.
Calculate context usage →All private token tools
Estimates, model limits, and pricing
Plain-text token estimation is approximate. Exact request counts can include message structure, tool schemas, images, files, and model-specific behavior that a private character estimate cannot reproduce.
Built-in pricing and model limits cover active OpenAI, Anthropic, Kimi, DeepSeek, and Qwen families as dated snapshots. Custom fields handle newer, negotiated, or regional rates.
Want the technical details? See how local browser processing works.