API Lifecycle Tool

OpenAPI Diff

Compare two OpenAPI specifications and highlight important API changes before they break integrations.

This first version uses demo diff output. It is designed to show the workflow and explain common API change types. Full OpenAPI parsing can be added later.

Compare API specs

Load an example or paste your own OpenAPI snippets.

Old OpenAPI Spec

New OpenAPI Spec

Added

Added endpoints or fields will appear here.

Removed

Removed endpoints or fields will appear here.

Breaking

Breaking changes will appear here.

Schemas

Changed schemas or fields will appear here.

What does this tool help with?

Added APIs

Shows new endpoints, fields or operations that clients may start using.

Removed APIs

Highlights endpoints or fields that disappeared and may break integrations.

Breaking Changes

Calls out changes that may require code, testing or contract updates.