JSON Formatter & Validator
What is a JSON Formatter and Validator?
A JSON formatter and validator is a tool that helps developers read, structure, and check their JSON (JavaScript Object Notation) data. It takes raw or unformatted JSON and adds proper indentation (beautification), making it human-readable. It also checks the syntax against standard JSON rules to catch errors like missing quotes, trailing commas, or unbalanced brackets.
Why Use Our JSON Tool?
Unlike many online JSON tools that send your data to a server for processing, our tool runs entirely in your browser using local JavaScript execution. This means your potentially sensitive API keys, user data, or proprietary configurations never leave your device, ensuring complete privacy.
What this tool does
What this tool does
- Format & minify: Beautify with indentation, or compress to a single line
- Syntax validation: Highlights the exact location of a parsing error
- Tree view: Browse deeply nested JSON as a collapsible tree instead of raw text
How to Use
- Input Data: Paste your raw or minified JSON into the Input area.
- Format or Minify: Click "Format" to beautify the JSON with proper indentation, or "Minify" to compress it into a single line.
- Validate: Click "Validate" to check for syntax errors. If invalid, the tool will highlight the issue.
- Copy Result: Copy the processed JSON from the Output area for your use.
Glossary
- JSON
- JavaScript Object Notation. A lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate.
- Minification
- The process of removing all unnecessary characters (like whitespace and line breaks) from source code without changing its functionality, often used to reduce file size.
- Beautification
- Adding consistent indentation and line breaks to compact or minified code to make it human-readable.
- Trailing Comma
- A comma left after the last item in an object or array — valid in JavaScript but invalid in strict JSON, a common cause of parsing errors.