I Built a Free Online DTD Validator for XML Developers (No Installation Required)

` As developers, we often work with XML in APIs, configuration files, and data exchange. And if your XML uses a DTD (Document Type Definition) , validation becomes critical. Recently, while working on a project, I ran into a frustrating issue: my XML wasn’t validating, and the error messages weren’t helpful. I tried several online tools, but most of them were: Outdated Slow Confusing Or required software installation So I decided to build a simple, fast, and free online DTD Validator that works directly in the browser. You can try it here: https://www.hifitoolkit.com/dtd-validator/ What is DTD Validation? DTD defines the structure of your XML document. It specifies: Allowed elements Element hierarchy Attributes Data structure Validation ensures your XML follows these rules. If it doesn’t, your application may fail. Example XML with DTD <!DOCTYPE note [ <!ELEMENT note (to,from,heading,body)> <!ELEMENT to (#PCDATA)> <!ELEMENT from (#PCDATA)> <!ELEMENT heading (#PCDATA)> <!ELEMENT body (#