AI Alt Text Generator: SEO-Friendly Alt Text in Seconds

Describe or link an image and get clear, SEO-friendly alt text in seconds, written to help screen readers and search engines understand every image.

Try:

2 credits per run. 20 free credits when you sign up, no credit card required.

AI Alt Text Generator · example output

Example
Copy

A first draft, written for your business and audience.

Edit the tone, length and details, then copy it straight into your page, post or campaign.

Example output. Yours is written for the details you enter.

How it works

From a short brief to a draft you can use straight away.

  1. Step 1

    Describe what you need

    A few details about your business, audience and goal.

  2. Step 2

    AI writes the first draft

    Tailored to your inputs and the platform it is for, in seconds.

  3. Step 3

    Edit, copy and use

    Tweak the tone, copy it in one click, and generate more variations.

What you get

What the result tells you, and why it is worth the minute it takes.

  • Accessibility Done Right

    Alt text is written to describe images clearly for screen reader users, not just for keywords.

  • SEO-Friendly by Default

    Descriptions weave in relevant terms naturally, helping images rank without keyword stuffing.

  • Faster Than Writing Manually

    Generate alt text for one image or a whole gallery far faster than writing each one by hand.

The guide

What the ai alt text generator does, how to use it, and what to do with the result.

An AI alt text generator writes descriptive alternative text for your images from the picture itself or a short prompt. You provide an image or describe it, and it returns concise, meaningful alt text. Good alt text makes images accessible to screen reader users and gives search engines context, so this tool helps you cover a library of images quickly.

What the AI alt text generator produces

The generator creates short, descriptive alt text that conveys what an image shows and why it matters on the page. Instead of vague labels, it aims for specific, natural descriptions a screen reader can announce clearly, capturing the subject, relevant details, and any text visible in the image. It keeps descriptions concise rather than stuffing keywords, which is what accessibility guidelines and search engines both reward. For decorative images that add no information, it can flag that empty alt text is more appropriate. The result is usable copy for each image's alt attribute, ready to paste into your CMS or template.

How to use the generated alt text

Add each description to the image's alt attribute in your HTML or CMS, replacing empty or filename-based values. Review the wording for accuracy, since only you know the image's role in the surrounding content, and adjust it to match the point the image supports. Keep genuinely decorative images with empty alt text so screen readers skip them instead of reading noise. Where an image carries meaning through visible text, make sure that text appears in the description. Work through your library systematically, prioritizing content images, product photos, and infographics. Recheck with an accessibility audit to confirm no meaningful image is left without a description.

Best practices for image alt text and SEO

Describe the image, do not just repeat your target keyword, since natural relevance beats stuffing for both accessibility and rankings. Keep descriptions concise, roughly a sentence, so screen readers stay efficient and the meaning lands quickly. Include a keyword only when it genuinely fits the image. Leave alt text empty for purely decorative graphics rather than inventing filler. Never begin with phrases like image of, because assistive technology already announces that it is an image. Consistent, honest alt text improves accessibility, helps images surface in image search, and adds context that supports the page's overall topic without gaming the system.

Frequently asked questions

Something else? Email support@brainito.com

What makes good alt text in 2026?

Good alt text describes what the image shows and why it matters in context, in roughly 125 characters or less. It should read naturally to someone using a screen reader while including a relevant keyword when it genuinely fits.

Does alt text really help SEO?

Yes. Alt text helps search engines understand images, supports image search rankings, and strengthens the topical relevance of the page. It is also required for accessibility compliance on most modern websites.

Is the AI Alt Text Generator free?

It is free to try. Every new Brainito account comes with 20 free credits, and each run costs 2 credits. Once signed in, you can generate alt text for as many images as your site needs, whenever you publish new visual content.

Where to go from here

The ai alt text generator answers one question. These are the next ones worth asking.

  1. Step 1AI StudioImages and video for campaignsOpen
  2. Step 2Social Media StudioSchedule and approve the postsOpen
  3. Step 3Free Marketing AuditSee every issue on the site across 77 factorsOpen

This tool checks one thing. An audit checks 77.

Want it fixed and tracked? See the Marketing Manager

Guides on this topic

Write accessible, SEO-friendly alt text for every image

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  • 20 free credits when you sign up
  • 2 credits per run
  • No credit card required