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YAML to Objective-C in Seconds — No Signup, Free

YAML to Objective-C Converter

Working with YAML data and need Objective-C models fast? YAML supports anchors (&) and aliases (*) for reusable values — this converter resolves them before generating types. This free, browser-based converter parses your YAML and generates clean, production-ready Objective-C code — no account required.

Generate Objective-C interface declarations with NSString/NSNumber properties for iOS legacy codebases.

How to use this converter

  1. Paste your YAML into the left editor panel
  2. Click Generate
  3. Copy the generated Objective-C code from the right panel

No account. No upload. No tracking. Runs entirely in your browser.

Example Objective-C output

@interface Address : NSObject
 
@property (nonatomic, copy) NSString *city;
@property (nonatomic, copy) NSString *zip;
 
@end
 
@interface User : NSObject
 
@property (nonatomic, assign) NSInteger userId;
@property (nonatomic, copy) NSString *name;
@property (nonatomic, copy, nullable) NSString *email;
@property (nonatomic, strong) Address *address;
 
@end

The problem with manual YAML-to-Objective-C mapping

Objective-C is a object-oriented, Smalltalk-influenced language — typed data models are central to how it works. Yet copying fields from YAML payloads into Objective-C @interface / @property definitions introduces subtle errors:

  • Mistyped field names cause silent deserialization failures
  • Missing optional fields trigger runtime panics or null errors
  • Schema drift between API and model goes undetected until production

Objective-C uses NSCoding or NSJSONSerialization for serialization — this converter generates @interface headers with appropriate property types.

This converter eliminates the manual step entirely.

Objective-C and YAML: what you need to know

Objective-C is a object-oriented, Smalltalk-influenced language, legacy iOS/macOS development and maintained Cocoa codebases. It uses NSObject subclass with property declarations for structured data — making it a natural fit for YAML-driven applications.

What the converter generates

Output produces .h interface files with @property declarations using correct memory management semantics (copy, strong, nullable). Nested objects use forward declarations.

A common gotcha

Objective-C has no generics — collections like NSArray and NSDictionary are untyped unless annotated with lightweight generics (NSArray<NSString *>).

YAML input characteristics

YAML is a superset of JSON and supports multi-line strings, block scalars, and complex nested structures. YAML is the de-facto standard for cloud-native configuration — Kubernetes, GitHub Actions, and Ansible all use YAML.

When should I use this converter?

Use this when maintaining legacy iOS codebases or developing mixed Swift/Objective-C projects that need typed model interfaces from JSON API responses.

Common use cases

  • Generating model classes for legacy iOS apps using AFNetworking
  • Creating typed interfaces for Objective-C layers in Swift/ObjC mixed projects
  • Producing model declarations for Objective-C SDK development
  • Keeping Objective-C structs in sync when YAML schemas evolve
  • Onboarding new team members by auto-generating the data layer
  • Validating YAML contract compatibility with Objective-C type definitions
  • Generating Objective-C models from legacy iOS apps API responses
  • Creating typed DTOs for macOS Cocoa
  • Rapid prototyping with real YAML payloads

Frequently asked questions

Is my YAML data sent to a server?

No. All conversion runs locally in your browser using client-side JavaScript. Your YAML data never leaves your machine.

What YAML inputs does this converter accept?

Paste any valid YAML — including Kubernetes manifests, Docker Compose, CI/CD pipelines, Helm charts, application config. The converter infers types and generates a matching Objective-C model.

What serialization library does the generated Objective-C code assume?

The generated code is compatible with the standard Objective-C serialization ecosystem — Objective-C @interface headers with @property declarations. No unusual dependencies required.

What version of Objective-C does the output target?

The converter targets modern Objective-C conventions — Objective-C @interface headers with @property declarations. If you need output for an older version, the generated code can typically be adapted with minor changes.

If you work frequently with YAML and Objective-C, bookmark this page to skip the manual model-writing step entirely.