AI

Local-first AI assistance utilities for prompts, tokens, and cost estimates — no external AI API by default.

AI Cost Calculator
Estimate AI usage cost from tokens and editable $/1K rates (USD).
AI Token Counter
Estimate token counts locally with a documented characters÷4 approximation.
Grammar Checker
Check writing with local lint heuristics for common issues.
Markdown Generator
Generate Markdown from fields or plain text with local templates.
Prompt Formatter
Format and structure prompts locally with deterministic rules.
Prompt Optimizer
Improve prompts with local heuristics for clarity, constraints, and output format.
Text Summarizer
Summarize text locally with an extractive sentence-ranking heuristic.