What is a breaking change?

A breaking change is a schema or contract change that can make existing consumers fail, such as removing required elements or tightening types.

Does this fetch external imports?

No. The UI validates local syntax only and does not fetch external imports or includes.

What should I validate before release?

Validate representative payloads, schema compatibility, and any security or namespace warnings reported here.

XSD Validator (Strict Mode)

Validate XML documents against XSD schemas with strict security settings, no external fetch, and detailed line/column error reporting. Free XSD validator by Graph Tools.

Use this free XSD validator to validate XML documents against XSD 1.0 or 1.1 schemas. The validator runs with strict security settings — no external schema fetching, limited recursion depth, and no network access — making it safe to paste production-like content. Results include detailed error messages with line and column numbers for every validation failure.

Related Tools

XPath Tester Online
XML Structural Diff Tool
XML Formatter & Beautifier