HTML Validation

Document Validation

The HTML validator presents the errors in the editor similar to any XML documents. It also checks the embedded CSS content and the warnings and errors are presented similar to the CSS editor.

Showing Validation Errors

Validation errors and warnings in HTML documents are marked in the main editing pane, in the vertical stripe on the right side of the editor, and in the Outline view. Colors help indicate the severity of the issue and details are presented in a pop-up window when hovering over an issue and in the stripe at the bottom of the editor.

Batch Validate HTML5 Project

An action is available in the Project view that provides the ability to validate multiple files attached to a project at once (HTML5 files, as well as CSS and JavaScript files).

What's New in
Oxygen XML Developer 27.1

March 24, 2025

Oxygen XML Developer version 27.1 boosts XSLT and XProc workflows with AI-enabled operations, introduces a more informative error reporting system, and makes versioning simpler through Git enhancements.

Learn more