JSON Validator

Validate, format, and minify JSON online. Check syntax as you type and inspect parsing errors in your browser.

JSON Validator

Free tool

Validate syntax, beautify nested objects, and minify payloads in one developer-friendly workspace.

Live validationBrowser-based processing

Lines

Total input lines

Characters

Including whitespace

File size

0 Bytes

UTF-8 encoded

JSON Workspace

Edit your JSON and choose an operation.

input.json

JSON · UTF-8

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0 lines · 0 chars

Everything you need to work with JSON

Validate syntax, format nested objects, and create compact payloads in one lightweight workspace.

Instant validation

Check JSON syntax as you type and identify parsing errors quickly.

Readable formatting

Prettify nested objects and arrays with consistent indentation.

JSON minification

Remove unnecessary whitespace to create compact JSON.

What is a JSON Validator?

A JSON validator checks whether data follows JavaScript Object Notation (JSON) syntax. Use it to inspect API responses, configuration files, application data, and nested objects before integrating them into your project.

This tool also lets you prettify JSON for readability or minify it to remove unnecessary whitespace. Parsing and formatting run in your browser without requiring a formatting API.

How to use this JSON Validator

Paste your JSON into the editor or load the sample.
Review the live validation status.
Use Prettify or Minify to transform valid JSON.
Copy the JSON when you're ready to use it.

JSON parsing and formatting are performed locally in your browser by this page. No JSON formatting API is required.