Z403: MISSING_ALT¶

Severity: Error

Penalty: 0.0 points | Category: general
Remediation & Opt-In

Auto-Fixable: No | Opt-In: No

Rationale¶

This accessibility rule is triggered when an HTML or Markdown image tag (such as ![](image.png) or <img src="...">) lacks descriptive alternative text (alt). Accessible image captions are required for screen readers.

How to Fix¶

Inspect the flagged location in the Markdown file and update the content or configuration:

Failing Pattern (Triggers Z403)

docs/example.md

<!-- BAD: Image tag without alternative text description -->
!\[\](../assets/diagram.png)

Passing Pattern (Resolves Z403)

docs/example.md

<!-- GOOD: Image tag with clear alternative text -->
![System Architecture Diagram](../assets/diagram.png)

Configuration¶

.zenzic.toml

# Audited across all Markdown image tags

Reference¶

See the Finding Codes Index for finding code details.