JSON Tools
Tools in This Collection
JSON Formatter
Beautify or minify JSON with customizable indentation. Validates syntax automatically.
JSON Validator
Validate JSON syntax and see detailed error messages with line numbers.
JSON to CSV Converter
Convert a JSON array of objects to CSV format with automatic header detection.
CSV to JSON Converter
Convert CSV data to JSON format instantly. First row is used as keys.
JSON Diff Tool
Compare two JSON objects and see exactly what was added, removed, or changed.
XML to JSON Converter
Convert XML data to JSON format instantly. Handles nested elements, attributes, and text content.
YAML to JSON Converter
Convert YAML to JSON format instantly. Supports basic YAML syntax with nested objects and arrays.
Frequently Asked Questions
- What is the difference between JSON formatting and validation?
- Formatting (or prettifying) adds indentation and line breaks to make JSON readable. Validation checks whether the JSON structure is syntactically correct according to the JSON specification. Our tools do both.
- Can I convert nested JSON to a flat CSV file?
- Yes. Our JSON-to-CSV converter flattens nested objects using dot notation for column headers. For deeply nested data, you may want to extract specific paths before converting.
- Is my JSON data sent to a server?
- No. All JSON tools on FreeToolStack run entirely in your browser. Your data never leaves your device, making them safe for working with API keys, tokens, and other sensitive payloads.