Alt Text Checker - Find Images Missing Alt Tags Free

Alt Text Checker

Enter a page URL to find every image missing alt text - missing alt attributes hurt image SEO and accessibility.

About Alt Text Checker

The Alt Text Checker from Fist Host SEO Tools scans any webpage and finds every image missing an alt attribute. You get a clear score - total images, how many have alt text, how many are missing it - plus a list of the exact image URLs that need fixing so you can update them in minutes.

How to use: 1) Paste the page URL. 2) Click check. 3) Read your alt score at the top. 4) Copy the listed image URLs that are missing alt text. 5) Add descriptive alt text to each in your CMS or HTML and re-run the check.

Why it matters for SEO rankings: Alt text is how search engines understand images - it powers Google Images traffic and reinforces the page's topical relevance. Missing alt attributes also fail accessibility audits, and accessibility is an increasingly visible quality signal. Descriptive alt text on every meaningful image is one of the easiest SEO wins available.

Key benefits: Instant alt score out of 100; lists every image missing alt with its source URL; reports declared image dimensions; flags both missing and empty alt attributes; 100% free with no signup.

Pro tips: Describe the image naturally and include your keyword only where it fits; keep alt text under 125 characters; decorative images can use an empty alt="" so screen readers skip them - this tool lists them so you can decide; check your most important landing pages first.

Related tools: Heading Analyzer, Meta Tags Analyzer, Image Compressor, Mobile Friendly Test.

FAQs: What is alt text? The alt attribute on an img tag - text shown if the image fails to load and read by search engines and screen readers. Is empty alt="" the same as missing? No - empty alt tells assistive technology to skip decorative images, while a missing attribute is an oversight; this tool flags both for review. Does alt text help Google Images rankings? Yes - it is one of the strongest signals Google Images uses to understand and rank pictures. How long should alt text be? A concise descriptive phrase, usually under 125 characters.

How alt text drives traffic: Google Images is one of the web’s largest search engines, and every optimized image is another doorway to your site. Product photos, infographics and screenshots with descriptive alt text rank in image search and send buyers directly to your pages. Beyond SEO, proper alt text opens your content to visually impaired users - a larger audience and a stronger brand reputation.

How to Use Alt Text Checker: Step by Step

1. Enter the URL of the page you want to scan.
2. Run the check to list every image on the page and its alt attribute status.
3. Identify images with missing or empty alt text — these are invisible to search engines and screen readers.
4. Write concise, descriptive alt text for each flagged image in your CMS or HTML.
5. Re-run the checker to confirm every meaningful image now has proper alt text.

Pro Tips

• Describe what the image shows and its purpose, not just “image” or the filename — good alt text helps both SEO and accessibility.
• Decorative images such as dividers should carry empty alt attributes so screen readers skip them.
• Keep alt text under about 125 characters; longer descriptions belong in the surrounding content or a caption.