Free & Browser-Based

Free developer & data tools

Free, browser-based calculators and converters for developers and data teams. No signup, and nothing leaves your browser. Use them, then come back when you need the real thing built.

AI Cost

LLM API Cost Calculator

Estimate your monthly OpenAI / Claude / Gemini bill from real usage, compare models side by side, and model the savings from routing and caching.

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Data Modeling

JSON to SQL Schema

Paste JSON, get a typed CREATE TABLE statement. Infers column types and nullability for PostgreSQL, MySQL or SQLite. Nothing leaves your browser.

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AWS Cost

AWS Glue Cost Calculator

Estimate your monthly AWS Glue bill from workers, job duration and runs, with crawler and Data Catalog costs. Compare Standard vs Flex and see what right-sizing saves.

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Taking on new projects · Outside IR35

Have a data pipeline or warehouse problem worth solving?

From messy source data to analytics-ready warehouses that cut cost. Let's scope it. I reply within one business day.

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