Free AI Alt Text Generator
Create SEO-friendly, accessible alt text for your images. Improve accessibility and search rankings in seconds.
Describe your image
Your generated alt text will appear here.
Why alt text is essential for modern social media
Alt text — short for alternative text — is a written description of an image that serves two critical purposes. First, it makes your content accessible to people who use screen readers due to visual impairments. According to the World Health Organisation, at least 2.2 billion people globally have a near or distance vision impairment. When you include meaningful alt text, you ensure your content reaches everyone, regardless of ability.
Second, alt text is a powerful SEO signal. Search engines cannot see images — they rely entirely on alt text to understand what an image depicts and how it relates to surrounding content. Well-crafted alt text directly influences your image search rankings, increases organic traffic, and improves your overall page relevance scores. Google has confirmed that alt text is one of the strongest signals for image search ranking.
What makes good alt text?
Effective alt text is concise (typically 125 characters or fewer), descriptive (it paints a clear picture of the image content), and contextual (it considers the surrounding content and purpose of the image). Avoid starting with "image of" or "picture of" — screen readers already announce that it is an image. Instead, focus on what the image shows and why it matters in context.
How our AI Alt Text Generator works
Describe your image in a few words — what it shows, who is in it, the setting, the mood — and the AI generates multiple alt text options optimised for your chosen context. Whether the image is for a blog post, social media, or an e-commerce product listing, the output adapts to match the expected audience and purpose. The SEO-optimised toggle adds relevant keywords naturally without keyword stuffing.
Many social platforms now support alt text natively — Instagram, X, LinkedIn, and Facebook all allow you to add alt text to images. Yet studies show that fewer than 1% of social media images include alt text. By using this tool, you gain a competitive advantage in both accessibility compliance and search visibility. For full AI-powered content creation, explore Sociro's complete platform.