Alt text, brief for alternative text, is a descriptive attribute added to HTML elements, especially images and multimedia content, to provide a textual description of the content's goal or meaning. Alt text should be concise and descriptive, catching the essence of its content. It's not just limited to images; alt text can also be applied to other non-text content, such as buttons, links, and interactive elements, to ensure a comprehensive and accessible user experience.

Why Is Alt Text Important?

Alt text is important because it makes images and other non-text content more accessible to people and search engines, even if it's not displayed. For example, search engines use alt text to understand the content and purpose of images and show those images for relevant queries in Google image searches. People who suffer from visual impairments use screen readers to view web pages. Alt text helps these users get information from non-textual content.

What Does a Good Alt Text Look Like?

Good alt text should be concise and descriptive, capturing the essence of the image or content it represents. Follow these rules: – Alt text should convey the content and function (purpose) of the element it describes. – Alternative text should be short, clear, and to the point, without unnecessary details. – Alt text must make sense within the context of the web page. – Alt text should contain the keyword you are building the page around. But be careful not to use alt text for spam keywords.

Alt Text Checker

Check a webpage for alt texts to enhance SEO and web accessibility!

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Why Alt Text Matters for Accessibility & SEO

Alt Text Checker is a free online tool that checks text alternatives for non-text elements with WCAG compliance. The application scans a webpage, finds non-text elements without text alternatives, and creates a report indicating a list of all deficiencies with their description and code fragments in which the issue was found.

From a web accessibility perspective, alt text promotes inclusivity by describing non-text content such as images, graphs, charts, emojis, buttons, links, etc. Screen readers used by people with visual impairments rely on alt text to convey the meaning and context of these elements, allowing them to understand the content entirely. These users need descriptive alt text to get important information, making their online experience more accessible. Additionally, internet accessibility is good for SEO. Google and other search engines use alt texts to improve their understanding of a website's content, which will lead to higher rankings. To summarize, proper implementation of alt text enhances website accessibility, expands audience reach, and has a positive impact on SEO, making it a critical element for inclusive web presence.

What Is Being Checked?

Along with checking the use of alt attributes for `img` elements (WCAG 2.1 Technique H37), the application also checks the following:
- H2 Combining adjacent image and text links for the same resource.
- H24 Providing text alternatives for the `area` elements of image maps.
- H35 Providing text alternatives on `applet` elements.
- H36 Using alt attributes on images used as submit buttons.
- 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.
- and more.

Powerful and robust Alt text Checker
Detailed and accurate results are ready for review in seconds
Designed to focus on full WCAG 2.0 compliance
Boost SEO and enhance your website's visibility
Work from your favorite device
No limits, no registration and installation of additional software

How to check alt texts

Select an HTML loading way from the drop-down menu. You can load a webpage via URL, upload a file from your device, or add code to check alt texts.
Click the „Check“ button to start the validation. The Alt Text 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 Alt Text?Alt text, brief for alternative text, is a descriptive attribute added to HTML elements, especially images and multimedia content, to provide a textual description of the content's goal or meaning. Alt text should be concise and descriptive, catching the essence of its content. It's not just limited to images; alt text can also be applied to other non-text content, such as buttons, links, and interactive elements, to ensure a comprehensive and accessible user experience.
Why Is Alt Text Important?Alt text is important because it makes images and other non-text content more accessible to people and search engines, even if it's not displayed. For example, search engines use alt text to understand the content and purpose of images and show those images for relevant queries in Google image searches. People who suffer from visual impairments use screen readers to view web pages. Alt text helps these users get information from non-textual content.
What Does a Good Alt Text Look Like?Good alt text should be concise and descriptive, capturing the essence of the image or content it represents. Follow these rules:
– Alt text should convey the content and function (purpose) of the element it describes.
– Alternative text should be short, clear, and to the point, without unnecessary details.
– Alt text must make sense within the context of the web page.
– Alt text should contain the keyword you are building the page around. But be careful not to use alt text for spam keywords.

Fast and Easy Alt Text Checker
Load HTML and click the „Check“ button to run the app. The Alt Text Checker examines WCAG compliance, producing a detailed report containing error counts, issue descriptions, and impacted code sections.
Check Alt Texts from Anywhere
The Alt Text 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.
Alt Text Checker Quality
When you run the Alt Text Checker it uses Aspose APIs, which are established well in the software industry and used by many Fortune 100 companies across 114 countries.