Tools
Small calculators and converters for the questions that come up while you build. Everything runs in your browser. Nothing is uploaded, and there is no API key to paste in.
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AI API cost calculator
Price a workload from token counts. Runs the same formula as the guide, in the browser.
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Cron builder and explainer for pipelines
Explain a cron expression, check the next runs in a real timezone, and get the day-of-month trap spelled out.
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Epoch and timestamp converter for pipelines
Turn epoch numbers into ISO, SQL and pandas output. Detects the unit from the digit count and runs entirely in the browser.
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Long-context surcharge calculator
One token over the threshold reprices the entire request. See the cliff, and what the naive calculation leaves out.
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MCP server config generator and validator
Generate an MCP server config for six clients, or paste the one that is not working and find out which line broke it.
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PII redaction tester
Paste the text you are about to send a model and redact structured identifiers in the browser. Checksum checks separate a real card from a lookalike.
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Prompt cache break-even calculator
Caching has a write premium at Anthropic, so it loses money below a 21.7 percent hit rate. Check your own numbers.
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RAG index cost calculator
Cost a RAG index before you build it: embedding the corpus, overlap inflation, and the per-query bill at your traffic.
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Snowflake warehouse credit and resize calculator
What a Snowflake warehouse really costs per day, floor charges and all, and the speedup that justifies moving up a size.
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Token and context budget calculator
Estimate a prompt's tokens, compare the Claude tokenizer penalty against OpenAI's, and check the request fits the window.
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Tool schema builder for strict mode
Infer a schema from sample JSON, get the strict-mode version that stops the API rejecting it, and validate one that already failed.