Generate structured changelogs from API version diffs. Categorize changes as Added, Changed, Deprecated, Removed, Fixed, or Security. Code never leaves your device — formatting and validation run locally in your browser.
Content reviewed October 2026 · About Toolzum
Compare two OpenAPI specs side-by-side to detect breaking changes, new endpoints, removed fields, and modified schemas between versions.
Generate Conventional Commits messages — type, scope, breaking flags — that changelogs can parse. Write feat(api): add retry in seconds — local generation, free, no signup.
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Endpoint lists, old and new — diffed into added, changed, and removed.
Breaking changes surface first, then additions, then fixes — in release order.
Markdown changelogs ready for release notes and documentation pages.
No — generation runs locally in your browser, free with no signup.
API Documentation Generator
Turn endpoint descriptions into clean API docs with parameters, responses, and curl samples. Document as you build, not after — local generation, free, no signup.
API Diff Checker
Compare two OpenAPI specs side-by-side to detect breaking changes, new endpoints, removed fields, and modified schemas between versions.