API Versioning Helper Free Online Tool 2026

Last updated March 22, 2026

Versioning Strategy Comparison

• URL path (/v1/users) — most visible, easiest to implement, most widely used
• Query parameter (?version=1) — keeps base URL stable, easy to test in browser
• Header (API-Version: 1) — clean URLs, less visible, harder to test in browser
• Content negotiation (Accept: application/vnd.api.v1+json) — most RESTful, most complex

Use the API Versioning Helper at TechConverter.me to choose the right versioning strategy, generate consistent URL patterns, and plan your API's evolution without breaking existing clients.

Resource: users
Strategy: URL path versioning

Generated endpoints:

Version 1:
  GET    /api/v1/users
  GET    /api/v1/users/{id}
  POST   /api/v1/users
  PUT    /api/v1/users/{id}
  DELETE /api/v1/users/{id}

Version 2 (breaking changes):
  GET    /api/v2/users
  GET    /api/v2/users/{id}
  POST   /api/v2/users
  PATCH  /api/v2/users/{id}   ← changed from PUT to PATCH
  DELETE /api/v2/users/{id}

Strategy: Custom header versioning

Request examples:
  GET /users
  API-Version: 1

  GET /users
  API-Version: 2

  # Or using Accept header (content negotiation):
  GET /users
  Accept: application/vnd.myapi.v2+json

NON-BREAKING changes (no new version needed):
  ✓ Adding a new optional field to a response
  ✓ Adding a new optional request parameter
  ✓ Adding a new endpoint
  ✓ Adding a new enum value (if clients handle unknown values)
  ✓ Relaxing validation (accepting more values)
  ✓ Adding new HTTP methods to existing resources

BREAKING changes (require a new version):
  ✗ Removing a field from a response
  ✗ Renaming a field
  ✗ Changing a field's data type (string → integer)
  ✗ Making an optional field required
  ✗ Changing URL structure
  ✗ Changing authentication method
  ✗ Changing error response format
  ✗ Removing an endpoint