zacdaddytools

zacdaddytools

JSON Formatter & Validator

Validate, beautify and minify JSON locally in your browser.

JSON input

Paste JSON to validate, beautify or minify it.

Processed locally in your browser

0 characters · 0 lines
Indentation

Ready to validate

Enter or paste JSON above.

Formatted output

Use Format or Minify to create copyable output.

Format and validate JSON clearly

JSON (JavaScript Object Notation) is a text format used to exchange structured data. Paste JSON into the editor to check whether its syntax is valid, then beautify it with two- or four-space indentation so nested objects and arrays are easier to read.

Validation uses the browser’s native JSON parser. If the input is invalid, the tool shows the parser’s useful error detail and a line and column only when a reliable character position is available. Formatting, minification and downloading remain unavailable until the JSON is valid.

Formatting a compact object

Input: {"name":"Zacdaddy","tools":29,"free":true}

The formatted result places each property on its own indented line.

The data and value types remain unchanged.

Beautified versus minified JSON

Beautified JSON adds whitespace and line breaks for people to read. Minified JSON removes unnecessary whitespace to create a smaller representation for transfer or storage. Both contain the same parsed data, provided the original JSON is valid.

Developers often beautify JSON while debugging and minify it when preparing a compact payload. The download button creates a local formatted.json file from valid JSON; it does not require a server round-trip.

Common JSON syntax errors

Frequent problems include missing commas, trailing commas, unclosed braces or brackets, and property names written without double quotation marks. JSON strings and object keys require double quotes; single-quoted JavaScript object syntax is not valid JSON.

JSON values may be strings, numbers, objects, arrays, true, false or null. JavaScript-specific values such as undefined, NaN and functions are not valid JSON values.

Your JSON is processed locally in your browser and is not sent to Zacdaddy. As with any clipboard action or downloaded file, your browser and device handle the resulting data in their usual way.

  • Check the character immediately before a reported parsing error.
  • Remove trailing commas after the final property or array item.
  • Make sure every opening brace, bracket and quotation mark is closed.

FAQs

Questions about the json formatter & validator

What is JSON?

JSON is a text-based data format built from objects, arrays and a small set of value types. It is widely used for web APIs, configuration and data exchange.

How do I know if JSON is valid?

Paste it into the editor. A valid result means the browser can parse the complete input according to JSON syntax.

What is the difference between formatted and minified JSON?

Formatted JSON adds indentation and line breaks for readability. Minified JSON removes unnecessary whitespace while preserving the same parsed data.

Does Zacdaddy store my JSON?

No external formatting API is used. Parsing, formatting and minification run locally in your browser.

Why won’t my JSON validate?

Common causes include trailing commas, single quotes, missing double quotes, unclosed braces or brackets, and JavaScript values such as undefined that JSON does not support.