3 tools
JSON Tools
Format, validate and minify JSON in your browser with clear errors and private local processing.
{}
JSON Formatter
Beautify JSON and validate syntax with readable indentation and precise parse errors.
JSON Tools ✓JSON Validator
Check whether JSON is valid and see clear syntax errors before using it in code.
JSON Tools ⇥JSON Minifier
Remove whitespace from valid JSON to create compact payloads and fixtures.
JSON ToolsWhy these tools are safe to use
Tools in this category run in your browser and keep pasted input local. Use them for API debugging, test fixtures and day-to-day developer cleanup without creating an account.
Missing workflow?
Request a developer tool
Tell us what you need to convert, validate, inspect or generate. We use requests to prioritize practical browser-based utilities for Lumarc DevTools.