Private, browser-only AI utilities
Build better AI workflows with clearer numbers.
Measure prompts, compare models, and forecast API budgets—without API keys or sending your text anywhere.
Explore AI toolsPhase 1
Eight practical tools
AI Token Counter
Count estimated tokens, characters, words, sentences, and timing for leading AI models.
Open tool →AI Cost Calculator
Estimate input, output, daily, and monthly API costs from your prompt.
Open tool →Context Window Calculator
See how much of each model’s context window your prompt uses.
Open tool →Token Visualizer
Explore a local approximation of how text becomes model tokens.
Open tool →Prompt Analyzer
Inspect prompt complexity, structure, placeholders, code, and more—privately.
Open tool →AI Model Comparison
Compare context, output limits, pricing, vision, and tool support.
Open tool →Prompt Size Estimator
Translate prompt length into words, tokens, pages, and reading time.
Open tool →AI Pricing Calculator
Forecast monthly API budgets across major AI providers.
Open tool →A focused AI learning library
Straightforward guides that connect token math, prompt design, model limits, and budgets.