TOOLGENIEFree JSON Editor
Edit, format, validate, and clean JSON directly in your browser. Paste JSON to inspect objects in a tree view, minify payloads, and download the cleaned file.
How to Use the JSON Editor
- Paste a JSON object, array, API response, or configuration file into the editor.
- Click Validate & Format to check syntax and expand the JSON with indentation.
- Use Minify JSON when you need a compact payload for an API request or config value.
- Review nested data in the tree viewer, then copy or download the result.
About the JSON Formatter
ToolGenie's JSON editor is built for quick debugging and cleanup. It helps developers inspect API responses, validate webhook payloads, format config files, and spot syntax mistakes before sending data to another system.
The formatter runs client-side, so the JSON you paste is processed locally in your browser. That makes it useful for everyday development work where you want speed and privacy without creating an account or uploading data.
Frequently Asked Questions
What is a JSON editor?
A JSON editor lets you paste, validate, format, minify, and inspect JSON data. It is commonly used for API responses, configuration files, webhooks, and logs.
Can this tool validate invalid JSON?
Yes. If the JSON cannot be parsed, the editor shows the parser error so you can fix missing commas, quotes, brackets, or other syntax issues.
Can I minify JSON for an API request?
Yes. Click Minify JSON to remove extra whitespace and convert formatted JSON into a compact single-line payload.
Is my JSON uploaded to ToolGenie?
No. Formatting, validation, minifying, copying, and downloading run in your browser. ToolGenie does not store the JSON you paste.
Does the editor support arrays and primitive JSON values?
Yes. JSON arrays, objects, strings, numbers, booleans, and null can be validated and formatted. Objects and arrays are easiest to inspect in the tree viewer.
Tips for Working With JSON
- Use double quotes around object keys and string values.
- Remove trailing commas before validating JSON from JavaScript snippets.
- Format API responses before reading nested fields or comparing payloads.
- Minify JSON only after you have confirmed that the formatted version is valid.
- Do not paste secrets, private tokens, or passwords into any tool unless necessary.