JSON Processing Toolkit
Comprehensive JSON tool suite: compare JSON differences, validate Schema, JSONPath queries, key sorting, flatten/unflatten. Essential developer toolkit
Compare Settings
Difference Report
About JSON Processing Toolkit
JSON Processing Toolkit is a comprehensive utility designed for modern web developers, API engineers, and data analysts. JSON (JavaScript Object Notation) has become the de facto standard for web data exchange, but manually reading, comparing, or validating deeply nested JSON structures is often tedious and error-prone.
This toolkit runs entirely in your browser using client-side JavaScript. This ensures unparalleled processing speed and privacy security—your sensitive API keys, configuration files, and customer data never sent to our servers. After the page loads, you can even use this tool offline.
We integrate five core tools into one interface: a semantic Diff comparison tool for identifying API changes, a Schema validator for ensuring data integrity, a JSONPath tester for debugging extraction logic, a key name sorter for normalization, and a flattening tool for converting complex objects into simple key-value pairs.
Core Features
Common Use Cases
JSON Syntax Reference
JSON (JavaScript Object Notation) has strict syntax requirements. Common rules include:
- Keys: Must always be enclosed in double quotes (e.g., "name").
- Strings: Must use double quotes. Single quotes are not valid JSON.
- Booleans: Use lowercase true or false.
- Last Element: Standard JSON prohibits trailing commas after the last element.
- Null Values: Use null to represent empty values.
- No Comments: Standard JSON does not support comments (// or /* */).
{
"project": "see-tool",
"version": 2.0,
"features": [
"Compare",
"Validate"
]
}Frequently Asked Questions
Is JSON comparison case-sensitive?
Yes, by default, "id" and "ID" are treated as different properties. However, if you want to ignore case differences, you can toggle the "Case Sensitive" option in the "Compare" tab.
Which version of JSON Schema is supported?
We implement a common subset of JSON Schema Draft 07, including core features such as type validation, required fields, property constraints, array items, min/max values, string length, and pattern matching. This covers the vast majority of modern use cases for API validation.
How does "Flatten" handle arrays?
You can choose dot notation (e.g., items.0.name) or bracket notation (e.g., items[0].name). This flexibility ensures compatibility with downstream tools such as form parsers or CSV converters.
Can I use JSONPath to modify data?
No, JSONPath is a query language for selecting and extracting data, similar to XPath for XML. It does not support directly modifying structures.
Why is "Key Sort" useful?
Sorting keys creates a "canonical" representation of JSON. This is crucial when generating cryptographic hashes (signatures) or comparing files in text-based version control systems like Git.
Is there a file size limit?
Since processing is done in the browser, the limit depends on your available memory (RAM). Files under 50MB can usually be processed instantly. Very large files (100MB+) may cause the browser tab to slow down.