What is an image alt tag?

The image alt attribute, also known as image alt text, is an HTML attribute applied to image tags to describe the appearance and function of an image on a webpage. Image alt text improves web accessibility, especially for visually impaired users. From an SEO point of view, search engines cannot analyze an image's theme. Therefore, if a webmaster wants a robot to categorize an image, he should make up a text for the alt tag.

Why are image alt tags important?

Image alt tags are important because they help website visitors with disabilities, like screen reader users, better understand the image on the page. Therefore, it's vital always to include an alt tag when using an image. On the other hand, without image alt tags, search engines cannot determine the content of an image. Alt texts combined with images are part of on-page SEO and enhance accessibility and user experience.

How to find an image without alt text?

The easiest and most reliable way to find images without alt text on your website is to use our Image Alt Tag Checker. With just a quick webpage scan, you'll receive an overview of issues with image alt tags and recommendations on how to address them. Find and fix images without alt texts!

Does the Image Alt Tag Checker collect data from my website?

No. The Image Alt Tag Checker audits your website’s current state without saving or collecting any further data.

Image Alt Tag Checker

Check the web page for image alt tags according to SEO guidelines and WCAG compliance.

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What is Image Alt Tag Checker?

The Image Alt Tag Checker is a free online tool designed to analyze a website and identify images lacking correct alt attributes or image alt tags. Alt tags are essential for web accessibility by providing descriptive text for images that can be read by screen readers and other assistive technologies. The Image Alt Tag Checker scans a webpage, finds images without alt tags, and creates a report indicating which images need descriptive alt attributes.

Alt text for images is not only a critical element of web accessibility, search engines have a hard time understanding images without alt text. Accessible websites are more likely to rank higher in search engine results, potentially increasing their visibility and reach. Developers can use this tool to ensure their websites comply with accessibility standards such as WCAG. By adding appropriate alt text, websites become more inclusive, making content accessible to people with visual impairments and improving SEO by providing meaningful descriptions for search engines.

What Is Being Checked?

Along with checking the use of alt attributes for image elements (WCAG 2.1 Technique H37), the application also checks the following:
- H2 Combining adjacent image and text links for the same resource.
- H67Using null alt text and no title attribute on `img` elements for images that assistive technology should ignore.
- H86 Providing text alternatives for emojis, emoticons, ASCII art, and leetspea.
- G197 Using labels, names, and text alternatives consistently for content that has the same functionality.

Powerful and robust Image Alt Tag Checker
Detailed and accurate results are ready for review in seconds
Designed to focus on full WCAG 2.0 compliance
Work from your favorite device
No limits, no registration and installation of additional software

How to check alt text of an image

In the drop-down menu, choose an HTML loading way. You can load a webpage from a URL, file from a local file system, or add code for the web accessibility check.
Click the „Check“ button to start the validation. The Image Alt Tag Checker will scan your website or HTML document for accessibility errors and issues with WCAG compliance.
A report will appear describing the accessibility status of the checked webpage. In the report, you will see the total number of errors and warnings, a list of all deficiencies with their description, and code fragments in which the issue was found.
You can export the report to JSON, XML, or TXT file for additional analysis.

What is an image alt tag?The image alt attribute, also known as image alt text, is an HTML attribute applied to image tags to describe the appearance and function of an image on a webpage. Image alt text improves web accessibility, especially for visually impaired users. From an SEO point of view, search engines cannot analyze an image's theme. Therefore, if a webmaster wants a robot to categorize an image, he should make up a text for the alt tag.
Why are image alt tags important?Image alt tags are important because they help website visitors with disabilities, like screen reader users, better understand the image on the page. Therefore, it's vital always to include an alt tag when using an image. On the other hand, without image alt tags, search engines cannot determine the content of an image. Alt texts combined with images are part of on-page SEO and enhance accessibility and user experience.
How to find an image without alt text?The easiest and most reliable way to find images without alt text on your website is to use our Image Alt Tag Checker. With just a quick webpage scan, you'll receive an overview of issues with image alt tags and recommendations on how to address them. Find and fix images without alt texts!
Does the Image Alt Tag Checker collect data from my website?No. The Image Alt Tag Checker audits your website’s current state without saving or collecting any further data.

Fast and Easy Image Alt Tag Checker
Load HTML and click the „Check“ button to run the app. The Image Alt Tag Checker examines WCAG compliance, producing a detailed report containing error counts, issue descriptions, and impacted code sections.
Check Image Alt Tags from Anywhere
The Image Alt Tag Checker works from all platforms including Windows, Linux, Mac OS, Android, and iOS. All files are processed on our servers. No plugin or software installation required for you.
Image Alt Tag Checker Quality
When you run the Image Alt Tag Checker it uses Aspose APIs, which are established well in the software industry and used by many Fortune 100 companies across 114 countries.