Free, fast, and secure online JSON processing tools. Format, validate, clean, convert, diff, and more — 14+ tools, one click away.
Format Conversion
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JSONC / JSON5 → JSON Converter
Convert JSONC (JSON with comments, e.g. tsconfig.json) or JSON5 (relaxed JSON syntax) to standard JSON.
JSON ↔ YAML Converter
Convert between JSON and YAML formats in both directions. Useful for config file migration and CI/CD pipeline debugging.
JSON ↔ CSV Converter
Convert JSON arrays to CSV tables, or restore CSV back to JSON object arrays. Supports custom delimiters and field mapping.
JSON → XML Converter
Convert JSON data into structured XML documents. Useful for interfacing with SOAP services or legacy XML APIs.
JSON Diff
Compare two JSON datasets line by line, highlighting additions, deletions, and modifications. Great for version comparison and API response change debugging.
Format Conversion
JSONC / JSON5 → JSON Converter
Convert JSONC (JSON with comments, e.g. tsconfig.json) or JSON5 (relaxed JSON syntax) to standard JSON.
JSON ↔ YAML Converter
Convert between JSON and YAML formats in both directions. Useful for config file migration and CI/CD pipeline debugging.
JSON ↔ CSV Converter
Convert JSON arrays to CSV tables, or restore CSV back to JSON object arrays. Supports custom delimiters and field mapping.
JSON → XML Converter
Convert JSON data into structured XML documents. Useful for interfacing with SOAP services or legacy XML APIs.
JSON Diff
Compare two JSON datasets line by line, highlighting additions, deletions, and modifications. Great for version comparison and API response change debugging.
More Tools
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JSON Formatter & Validator
Format compressed JSON strings into indented, readable form while validating JSON structure. Supports custom indent width and space/tab switching.
JSON Minifier
Remove all unnecessary whitespace and line breaks from JSON, compressing data to a single line to reduce size.
JSON Escape
Escape special characters in JSON strings (quotes, backslashes, etc.) to generate string literals that can be directly embedded in code.
JSON Unescape
Restore escaped JSON strings to their normal format by removing extra escape characters.
JSONPath Query
Use XPath-style JSONPath expressions to precisely locate and extract data in complex JSON. Supports wildcards, filters, and recursive descent.
JSON Schema Validator
Validate JSON data structure and types against JSON Schema specifications. Supports Draft-07/2019-09/2020-12 with detailed error reports.
JSON Tree Viewer
Interactively browse large JSON data in a collapsible tree structure. Supports node expand/collapse, search, and path copying.
JSON Sort & Dedup
Sort JSON object keys alphabetically and deduplicate array elements. Gives JSON data consistent ordering for version control and manual comparison.
Mock JSON Generator
Quickly generate random mock data from predefined templates or real-time edited skeletons. Supports custom field types, array lengths, and value ranges.
More Tools
JSON Formatter & Validator
Format compressed JSON strings into indented, readable form while validating JSON structure. Supports custom indent width and space/tab switching.
JSON Minifier
Remove all unnecessary whitespace and line breaks from JSON, compressing data to a single line to reduce size.
JSON Escape
Escape special characters in JSON strings (quotes, backslashes, etc.) to generate string literals that can be directly embedded in code.
JSON Unescape
Restore escaped JSON strings to their normal format by removing extra escape characters.
JSONPath Query
Use XPath-style JSONPath expressions to precisely locate and extract data in complex JSON. Supports wildcards, filters, and recursive descent.
JSON Schema Validator
Validate JSON data structure and types against JSON Schema specifications. Supports Draft-07/2019-09/2020-12 with detailed error reports.
JSON Tree Viewer
Interactively browse large JSON data in a collapsible tree structure. Supports node expand/collapse, search, and path copying.
JSON Sort & Dedup
Sort JSON object keys alphabetically and deduplicate array elements. Gives JSON data consistent ordering for version control and manual comparison.
Mock JSON Generator
Quickly generate random mock data from predefined templates or real-time edited skeletons. Supports custom field types, array lengths, and value ranges.
JSON Serialization Guides
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Python JSON Serialization Guide
In-depth guide to the Python json module, covering json.dumps, json.loads, custom encoders, datetime handling, and dataclass integration.
JavaScript JSON Serialization Guide
Detailed guide to JSON.stringify and JSON.parse advanced usage, including replacer/reviver parameters, BigInt handling, deep copy pitfalls, and JSON Schema validation.
Java JSON Serialization Guide
Comprehensive comparison of Jackson, Gson, and Fastjson libraries, covering annotation configuration, generic handling, polymorphic deserialization, and performance optimization.
Go JSON Serialization Guide
Master the Go encoding/json package, including struct tag definitions, custom Marshaler/Unmarshaler interfaces, zero-value omission strategies, and performance tuning.
C# JSON Serialization Guide
Systematic introduction to System.Text.Json and Newtonsoft.Json serialization techniques, including naming policies, camelCase conversion, dynamic object handling, and Source Generator acceleration.
JSON Serialization Guides
Python JSON Serialization Guide
In-depth guide to the Python json module, covering json.dumps, json.loads, custom encoders, datetime handling, and dataclass integration.
JavaScript JSON Serialization Guide
Detailed guide to JSON.stringify and JSON.parse advanced usage, including replacer/reviver parameters, BigInt handling, deep copy pitfalls, and JSON Schema validation.
Java JSON Serialization Guide
Comprehensive comparison of Jackson, Gson, and Fastjson libraries, covering annotation configuration, generic handling, polymorphic deserialization, and performance optimization.
Go JSON Serialization Guide
Master the Go encoding/json package, including struct tag definitions, custom Marshaler/Unmarshaler interfaces, zero-value omission strategies, and performance tuning.
C# JSON Serialization Guide
Systematic introduction to System.Text.Json and Newtonsoft.Json serialization techniques, including naming policies, camelCase conversion, dynamic object handling, and Source Generator acceleration.