Markdown to PDF in the Browser, No Pandoc or LaTeX
Convert Markdown to PDF in your browser with no Pandoc or LaTeX. Paste a README or notes, pick A4 or Letter, and download. See the limits first.
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CSV to JSON for an API, Test Fixtures or a Seed File
Convert CSV to JSON in your browser for API tests, fixtures or seed files. Handles quoted commas, type inference and semicolon files, no script needed.
Convert HTML Table to Markdown or CSV with Merged Cells
Convert HTML table to Markdown or CSV in your browser. Handles colspan, rowspan, commas and quotes, so you can copy any web table into a README.
JSON Schema to Zod and TypeScript Types, No Hand-Writing
Convert JSON Schema to Zod and TypeScript types in your browser. See real output for enums, required fields, $ref and unions, then use z.infer.
Claude Tool Use JSON Schema: Write a Tool Definition
Write a Claude tool use JSON schema with name, description and input_schema. Build it in the browser and get the OpenAI format from the same form.
Count Tokens for a Claude Prompt and Estimate API Cost
Count tokens for a Claude prompt in your browser, then estimate the API cost per call and per month. Free token counter, with a worked example.
How to return multiple items in map function in JavaScript
The map() function enables you to loop over every element in an array and modify it and then return a different element to replace the initial element. The JavaScript map() functio