815 B
Accessibility
The workbench uses semantic landmarks, ordered headings, labelled native controls and a real ARIA tab list. Left/Right, Home and End move between views. File selection, format selection, analysis, formatting, querying, copy and download are keyboard operable.
Parser and action state use polite live regions. Errors include text labels and codes rather than relying on colour. Tree rows expose treeitem levels, tables have captions and keyboard-scrollable regions, and truncated previews state what was omitted. Visible focus, reduced-motion preferences, responsive layouts and Toolbox system/light/dark themes are supported.
Large source and output areas remain native textareas so browser selection, zoom, high-contrast settings and assistive-technology editing conventions continue to work.