JSON Transformer

JSON Transformer solves the universal developer problem of moving data between systems that speak different JSON dialects. Instead of writing one-off transformation scripts, it generates reusable, documented mapping code.

Transformation Operations

Field Mapping Rename, move, and restructure fields with a declarative mapping: ``` source: { user: { first_name, last_name } } target: { name: { given, family } } ```

Data Type Coercion - String → number with locale-aware parsing - ISO date strings ↔ Unix timestamps - Nested objects ↔ dot-notation strings - Arrays ↔ comma-separated strings

Filtering and Projection - Include/exclude fields by path or pattern - Filter array elements by predicate - Remove null, undefined, or empty values

Array Operations - Flatten nested arrays - Group array items by a key field - Deduplicate by composite key - Sort by field with null handling

Merging - Deep merge with conflict resolution strategies (left-wins, right-wins, merge-arrays) - Join two arrays by matching key - Aggregate (sum, count, average) across grouped records

Code Generation

• Outputs transformation as:
• JavaScript/TypeScript function with full typing
• Python function with type hints
• jq expression for command-line use
• JSONata expression for low-code platforms

Validation

Generates JSON Schema for both input and output, with example test cases.