How do I fix duplicate-id?

Make each name unique. Developer task, listed precisely below. Make every id unique on the page; duplicates break labels, ARIA references and anchors.

Error · duplicate-id

Repeated internal names

Q: What does the duplicate-id error mean?

Repeated internal names. Two elements share the same internal name, which confuses assistive technology and can break forms.

Q: Who does it affect?

blind people (screen readers), people who can't use a mouse

Two elements share the same internal name, which confuses assistive technology and can break forms.

Who it leaves out: blind people (screen readers) · people who can't use a mouse

How to fix it

Make each name unique. Developer task, listed precisely below.

In the code

Make every id unique on the page; duplicates break labels, ARIA references and anchors.

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Related errors

Images without a description image-alt
Image buttons without a name input-image-alt
Buttons with no name button-name
Links that don't say where they go link-name
Form fields without a label label
Drop-down menus without a label select-name

Automated testing covers roughly half of WCAG criteria; a full conformance claim also requires manual review. Technical information, not legal advice.