Instant JSON to Apex Converter for Salesforce Developers

Generate Apex classes and tests in seconds. Paste your JSON below!

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✓ Valid JSON
Size: 0.2KB | Lines: 1
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WrapperClass.cls

How to Use json2apex

  1. Click the Settings icon (⚙) in the toolbar to change the Apex Class Name or disable parsing methods.
  2. Paste your JSON input directly or upload a JSON file (📂) in the toolbar.
  3. Your Apex wrapper class and test classes are automatically generated on the fly.
  4. Toggle between Apex Class and Test Class tabs in the output pane.
  5. Download your classes as a ZIP (📦) or download individually. Copy code to clipboard (📋) with a single click.

Key Features

Salesforce Deserialization Architecture: Apex Wrapper Classes

When building integrations connecting Salesforce Core to enterprise platforms (such as SAP ERP, NetSuite, and complex custom microservices orchestrated via MuleSoft, Apigee, or Boomi), computational efficiency is critical. Because Apex synchronous transactions are subject to a strict 10,000ms CPU governor limit, recursive parsing of raw maps via JSON.deserializeUntyped() runs the risk of limit exhaustion on bulk data streams due to interpreted heap allocation and garbage collection overhead.

Statically typed Apex Wrapper Classes leverage native, optimized virtual machine parsing (executing at the C++ layer), bypassing interpreted runtime bytecode overhead. Designing resilient integration contracts requires advanced handling of reserved keyword collisions (such as JSON keys named class, object, or public), mapping data directly to Person Accounts vs standard Account/Contact topologies, and establishing defensive exception and transaction Savepoint boundaries to isolate runtime errors.

Read the Architectural Guide