Bookmarklets

Highlights anchor elements with no discernible text: no visible text, aria-label, aria-labelledby, title, or img alt. Alerts with a count of failures.

Highlights all images missing an alt attribute and alerts with a count. Note: does not flag images with empty alt, which may be intentional for decorative images.

Injects a high-visibility red focus outline on all focusable elements. Click again to remove. Useful for testing with keyboard when focus indicators have been suppressed.

Logs every focus change to the DevTools console with details about the element receiving focus.

Expands an open modal and hides the page behind it so the full modal content prints to PDF. Click again to undo.

A keyboard-and-screen-reader-friendly alternative to DevTools inspection. Copies the focused element's tag, attributes, resolved ARIA references, state, and HTML to the clipboard.

Flips light and dark themes by rewriting prefers-color-scheme media queries and toggling common theme hooks (a dark/light class or data-theme attribute on the html element). Click again to toggle back. Limitations: theme managers that persist state may immediately revert the change, cross-origin stylesheets without CORS headers are skipped, custom theme attribute values are not recognized, and styles loaded after running it need a re-click.