Developer Studio · 30 tools
JSON Tools
30 free JSON tools: formatter, validator with exact error positions, JSON to TypeScript, CSV, YAML and XML, diff, repair and JSONPath.
Part of Developer Studio.
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JSON Formatter
Beautify and format JSON with syntax highlighting
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JSON Validator
Validate JSON syntax and get detailed error messages
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JSON to TypeScript
Generate TypeScript interfaces from JSON objects
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CSV to JSON
Convert CSV table to JSON array format with proper parsing
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JSON Diff / Comparator
Compare two JSON objects and highlight all differences
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JSON Minifier
Minify JSON to remove whitespace and reduce file size
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JSON to CSV
Convert JSON array to CSV table format for spreadsheet import
All json tools
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CSV to JSON
Convert CSV table to JSON array format with proper parsing
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JSON Diff / Comparator
Compare two JSON objects and highlight all differences
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JSON Formatter
Beautify and format JSON with syntax highlighting
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JSON Minifier
Minify JSON to remove whitespace and reduce file size
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JSON to CSV
Convert JSON array to CSV table format for spreadsheet import
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JSON to TypeScript
Generate TypeScript interfaces from JSON objects
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JSON to XML
Convert JSON data to XML format with proper tags and structure
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JSON to YAML
Convert JSON to YAML format with proper indentation and structure
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JSON Validator
Validate JSON syntax and get detailed error messages
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XML to JSON
Convert XML to JSON format preserving data structure and hierarchy
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JSON ⇄ JSONL Converter
Convert a JSON array to JSONL/NDJSON and back, line by line
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JSON Array Tools
Filter, sort, map and paginate JSON arrays interactively
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JSON Flattener
Flatten nested JSON into a single-level dot-notation object
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JSON Key Extractor
Extract all keys, paths, and values from a JSON object
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JSON Key Sorter
Sort all JSON object keys alphabetically (deep)
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JSON Merger
Deep merge two JSON objects with conflict resolution
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JSON Query / Filter
Filter and transform JSON arrays with field conditions
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JSON Repair
Fix broken JSON — trailing commas, single quotes, unquoted keys, comments
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JSON Schema Validator
Validate JSON data against a JSON Schema (draft-7)
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JSON Size Analyzer
Analyze JSON structure depth, key count, and byte size
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JSON String Escape
Escape and unescape JSON special characters in strings
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JSON to .env
Convert flat JSON objects to .env environment variables
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JSON to Go Struct
Generate a Go struct with json tags from a JSON sample
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JSON to Markdown Table
Convert JSON arrays to GitHub-flavored Markdown tables
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JSON to Python TypedDict
Generate a Python TypedDict class from a JSON sample
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JSON to SQL INSERT
Generate SQL INSERT statements from a JSON array of objects
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JSON to Table
Render JSON arrays as an interactive HTML table
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JSON Unflattener
Expand flat dot-notation JSON back to nested structure
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JSONPath Tester
Test JSONPath expressions and extract values from JSON
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YAML to JSON
Convert YAML to JSON format with proper parsing and validation
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About JSON Tools
These 30 JSON tools cover formatting, checking, converting and exploring data. The JSON Formatter pretty-prints or minifies a payload, and the JSON Validator points to the exact line and column of an error with a short explanation, whether it is a trailing comma, a single quote or an unclosed bracket. It also warns about duplicate keys and integers too large for JavaScript to hold exactly.
Converters turn JSON into CSV, YAML, XML, Markdown tables or environment variables, and CSV, YAML and XML back into JSON. Code generators such as JSON to TypeScript infer types from every element of an array, so optional fields are marked correctly. When something is broken, JSON Repair fixes common problems such as comments, unquoted keys and Python-style values, and JSON Diff compares two documents by structure. Your data is parsed in the browser and never sent anywhere.
Frequently asked questions
Why does the validator reject comments?
Can I convert nested JSON to CSV?
How large a JSON file can I format?
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