Best JSON Tools for Developers

Use these free online JSON tools to format, validate, minify, compare, and inspect JSON responses from APIs and configs.

JSON Formatter

Beautify and pretty-print JSON with consistent indentation. Ideal for debugging API responses and logs.

Open JSON Formatter

JSON Validator

Check JSON syntax and quickly locate errors with line and column information.

Use JSON Validator

JSON Minifier

Remove whitespace and line breaks to shrink JSON payloads for production.

Use JSON Minifier

JSON Diff

Compare two JSON objects and highlight differences when debugging config or API changes.

Use JSON Diff

JSON Viewer

Inspect JSON in a collapsible tree view with expand/collapse nodes.

Use JSON Viewer