Is my data uploaded anywhere?

No. All conversions run in your browser — nothing you paste is sent to a server.

What JSON does CSV conversion expect?

An array of objects (or a single object). Column headers come from the object keys; nested values are stored as JSON.

They're inferred from your sample, so types match the example you paste. Review optional/union fields and rename interfaces to taste.

Standard YAML via the js-yaml parser — the same library used across the JavaScript ecosystem.

Convert between JSON, CSV, YAML and TypeScript interfaces — JSON↔CSV, YAML↔JSON and JSON→TypeScript, all in your browser.

Input

Output

Processed 100% in your browser — nothing you enter here is ever uploaded.

Turn a JSON array into a spreadsheet-ready CSV, or import a CSV back into JSON.

Generate TypeScript interfaces from a sample JSON response for type-safe code.

Convert config between YAML and JSON when tools expect one or the other.

Pick a conversion: JSON → CSV, CSV → JSON, JSON → TypeScript, YAML → JSON or JSON → YAML.

Paste your data into the input box on the left.

The converted result appears on the right as you type.

Copy the output — everything runs in your browser, nothing is uploaded.