About
A free, privacy-first toolkit for working with JSON.
What is JSONConvert?
A free online toolkit that converts JSON to TypeScript interfaces, Zod schemas, Pydantic models, Go structs, and more. It also formats, validates, compares, and converts JSON to YAML, CSV, XML, and other formats.
How it works
Everything runs in your browser. When you paste JSON and pick an output format, the conversion happens locally using JavaScript. No data is sent to any server. No API calls. No processing queue. The result appears instantly as you type.
Privacy
We built JSONConvert because we needed a JSON converter we could trust with production data. No ads, no tracking pixels, no analytics cookies, no data collection. The only thing stored locally is your theme preference.
35+ tools across 3 categories
Code Generators: TypeScript, Zod, Pydantic, Go, C#, Java, Kotlin, Dart, Rust, Swift, PHP, JSON Schema. Utilities: Formatter, Validator, Beautifier, Minifier, Stringify, Diff, Viewer, Escape, JWT Decoder, JSONPath. Converters: YAML, CSV, XML, SQL, Markdown, HTML Table, YAML→JSON, CSV→JSON, Base64.
Stack
Built with Next.js, React, and Tailwind CSS. Hosted on Vercel. All conversion logic runs client-side - no server-side processing, no external API dependencies.
Contact
Found a bug or have a feature request? Open an issue on our GitHub repository.
More from us
We build free developer tools. Check out our other projects: