Image Alt Tag Checker

Find missing, empty, or duplicate alt attributes. Paste your HTML snippet and get instant accessibility feedback.

Results

Run the checker to view issues.

Every image deserves context

Scan templates, blog posts, and landing pages to make sure you’re delivering alt tags that describe the image for both humans and search bots.

  • • Highlight missing or empty alt text
  • • Detect duplicated alt descriptions
  • • Rapid QA for content and SEO teams

Accessibility

Alt Tag Audit

Unique, descriptive alt text
Avoid empty alt on informative imagery

How this Image Alt Tag Checker works

This SEO and accessibility auditor scans webpage images detecting missing alt attributes, empty alt values, or generic descriptions like "image" that fail accessibility standards and SEO best practices. The checker crawls specified URLs extracting all <img> tags, validates alt attribute presence and meaningfulness through pattern matching flagging single-word or templated values, and reports statistics on compliance percentages. Detailed results list specific images needing attention with source URLs, current values, and improvement suggestions based on visible filenames or surrounding context. Bulk mode processes entire sitemaps identifying patterns where CMS configurations omit alt text, integration with content workflows prevents publishing images lacking descriptions, and competitive analysis benchmarks alt text quality against industry standards. Applications include achieving W CAG accessibility certification requiring all images have meaningful alternatives, improving SEO as search engines use alt text for image indexing, diagnosing why visually impaired users report poor screen reader experiences, or auditing e-commerce sites ensuring product images have descriptive text aiding discovery.

How to Use

1

Paste HTML

Drop in your template, CMS snippet, or rendered HTML.

2

Run Checker

We scan every <img> tag and evaluate its alt attributes.

3

Fix Issues

Get clear guidance on missing, empty, or duplicate alt text.

Frequently Asked Questions

What does an Image Alt Tag Checker do?
It scans images and checks whether alt attributes are present and meaningful. This helps you improve accessibility and catch SEO issues caused by missing or weak alt text.
What makes good alt text?
Describe what the image shows in plain language, focusing on what a user needs to understand. Keep it specific, avoid keyword stuffing, and do not repeat nearby text.
When should alt text be empty?
If an image is purely decorative and adds no meaning, use empty alt text (alt="") so screen readers can skip it. For informative images, always provide a real description.
Does alt text directly improve rankings?
Alt text mainly improves accessibility and helps search engines understand images. It can support image search visibility and overall page clarity, but it will not replace strong on-page content.
Is this Image Alt Tag Checker secure?
Yes. It runs 100% client-side, so your inputs and results stay in your browser and are not uploaded to a server.

Related Tools

The Image Alt Tag Checker is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.

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