Accessibility Internals

Use this page to inspect the internal representation of accessibility in Chrome. You can see and modify the various accessibility modes Chrome has. You can also view the accessibility tree for a specific page, or for the Chrome app natively.

Accessibility modes:

Check/uncheck accessibility modes to see how they change a page's accessibility.

Native accessibility API support

Allows Chrome to be controlled via native accessibility APIs specific to this platform.

Web accessibility

Accessibility support is enabled for web content.

Text metrics

Enables support for querying line breaks and the bounding box of arbitrary character ranges.

Extended properties

Exposes accessibility APIs needed only by advanced assistive technologies.

Screen reader

Exposes accessibility APIs needed only by screen readers.

HTML

Exposes HTML tag names and attributes via accessibility APIs.

Active assistive technology

Active assistive technology:

Is the active AT a screen reader:

Locking the accessibility mode from being changed by other applications:

Accessibility features in Chrome are off by default and enabled automatically on-demand.

Suppress automatic accessibility enablement from platform API consumers such as assistive tech.

Changes to this setting will persist until the browser is restarted. This setting is the same as running with --disable-platform-accessibility-integration.

Lock the current accessibility mode from being changed except by this page.

To force accessibility to be enabled at launch, run Chrome with this flag:

--force-renderer-accessibility

To force the accessibility AXMode to one of the predefined bundles, run Chrome with the --force-renderer-accessibility flag and optional argument:

--force-renderer-accessibility=[basic|complete|form-controls]

If the optional parameter is absent, the AXMode bundle will default to complete.

To disable accessibility, run Chrome with this flag:

--disable-renderer-accessibility

Accessibility tree viewing options:

API type shown in the tree:

Filters:

Use filters to match the attributes and attribute values you want included in the output. Filters can contain simple wildcards (*) only, they're not regular expressions. Attributes are separated by spaces.

Allow:

Include these attributes. Empty attributes are skipped.

Allow empty:

Include these attributes, even if they are empty.

Deny:

Exclude these attributes.

Accessibility Internals

Accessibility modes:

Active assistive technology

Locking the accessibility mode from being changed by other applications:

Accessibility tree viewing options:

Filters:

Chrome Native UI:

Pages:

Top Level Windows: