Developer builds 24 free browser-based dev tools with no data uploads

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A developer frustrated with ad-heavy JSON formatting sites has launched jsonkit.tools, a suite of 24 client-side browser tools that process data locally without requiring signups or file uploads. The platform covers JSON formatting, validation, format conversion between JSON, CSV, YAML, and XML, Base64 and URL encoding, JSON diffing, TypeScript generation, and more. Each tool has its own dedicated URL and is built with Astro for fast static page loads, using vanilla JavaScript to avoid framework overhead. Beyond the browser interface, the creator also released api.jsonkit.tools, offering 28 API endpoints that mirror the UI's functionality for use in automation workflows and LLM agent pipelines. The project is open for public feedback and is available free of charge.

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