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JSON Tools

Browser-based JSON tools — fast, private, and free

What is JSON Tools?

JSON Tools is a free collection of browser-based utilities for working with JSON. Use it to format, validate, compare, view, and convert data without uploading anything — all processing happens locally in your browser. The suite includes a formatter, validator, diff viewer, converters (CSV, Excel, XML, YAML, SQL), and schema/code generators for TypeScript, Dart, C#, GraphQL and Zod. No signup, no limits, and no tracking — built to help developers and data analysts move faster with reliable, privacy-first JSON tooling.

Key features

Format and beautify JSON with proper indentation and syntax highlighting.
Validate JSON and get detailed error messages for quick fixes.
Compare two JSON objects and highlight structural and value differences.
Convert JSON to CSV, Excel, XML, YAML, SQL, and other formats.
Generate typed models and validation schemas for various languages.
Run entirely in the browser so your data never leaves your device.