Image alt tags checker

Free Image Alt Tags Checker — Find Images Missing Alt Text

This tool scans a page's images and reports which ones have alt attributes and which are missing them. Enter any URL and you'll see every image and its alt text status — a fast way to catch accessibility and SEO gaps that are easy to overlook.

Alt text serves two audiences. For people using screen readers, it's the only way to understand what an image conveys — making it a genuine accessibility requirement, not a nice-to-have. For search engines, alt text is how Google understands image content, which powers Google Images traffic and adds relevant context to the page. Descriptive, accurate alt text helps both; missing alt attributes leave images invisible to assistive technology and to image search alike.

Use this tool to find images with no alt attribute, to audit a page before publishing, and to prioritize which images need descriptions written. Aim for concise, descriptive alt text that conveys the image's purpose rather than stuffing keywords — purely decorative images can use an empty alt attribute so screen readers skip them. Fixing missing alt text is low-effort, improves accessibility compliance, and opens up image-search traffic you're otherwise leaving behind.

From one check to a complete audit

This tool checks one thing. Smart SEO Audit checks 50+ — technical, on-page, content and speed — on any URL in under 10 seconds, with an AI-prioritized fix list, scheduled monitoring and Swiss, GDPR-compliant hosting. Start free — 5 full audits a month, no credit card.