HTML Alt Text Checker
Scan HTML for images missing alt text, empty alt attributes, or broken img and src tags. Get a WCAG-friendly accessibility report with line numbers and exportable results.
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What is HTML Alt Text Checker?
HTML Alt Text Checker scans your HTML markup for image accessibility issues. It finds images missing alt text (a WCAG 1.1.1 failure), flags empty alt attributes for review, and detects broken images with missing or blank src. Results include exact line and column numbers, severity levels, and an exportable report.
Key Benefits
- Catches missing alt attributes that fail WCAG 1.1.1 non-text content criteria
- Flags empty alt attributes so decorative intent is confirmed, not guessed
- Detects broken images with missing or empty src values
- Pinpoints issues with exact line and column numbers for fast fixes
- Exports a clean accessibility report for tickets, audits, and documentation
Common Use Cases
- •Auditing landing pages and email templates before launch
- •Checking CMS-generated HTML for missing alt text
- •Validating component library output for accessibility compliance
- •Reviewing third-party or legacy HTML inherited from old projects
- •Generating accessibility reports for QA tickets and pull requests
How to Use HTML Alt Text Checker
- Paste your HTML: Paste the HTML markup you want to audit into the input box, or click Sample to load an example.
- Review the scan results: Each image tag is listed with a severity badge, line and column number, and a message explaining the issue or confirming it passed.
- Fix the flagged images: Add descriptive alt text to images flagged as errors, confirm empty alt attributes are intentionally decorative, and repair any broken src values.
- Export the report: Click Copy Report to copy the accessibility findings to your clipboard, or Download to save a plain-text report file.
Key Features
- Scans all image tags with accurate line and column reporting
- Three severity levels: errors, warnings, and passed images
- Live summary stats for total, errors, warnings, and passed
- Export a plain-text accessibility report or copy to clipboard
- 100% client-side — no HTML ever leaves your browser