YouTube & Images

Image Alt Text Generator: Write Descriptive Alt Text With AI

Upload an image or describe it and get descriptive, accessible and SEO friendly alt text written by AI, with your keyword included naturally.

By SEO Tools Pro Team·Oct 26, 2026·3 min read
🖼️Free tool: Image Alt Text GeneratorUpload an image and get descriptive, SEO-friendly alt text written by AI.Use it free →

Writing alt text for one image is easy. Writing it for three hundred product photos is a chore that most store owners skip. The result is a website that is harder to use for blind visitors and invisible in Google Images. A gadget store on Hall Road once told me they had given up on alt text because they upload twenty new products a day. With an AI helper, writing good alt text takes seconds per image.

What our alt text generator does

The Image Alt Text Generator uses AI vision to look at your image and describe it. You can also describe the image in your own words if you prefer. You get:

  • Several alt text options of different lengths
  • Natural keyword use if you add a keyword
  • Descriptions that focus on what matters, such as product type, colour and setting
  • One click copy for each option

How to use it

  1. Open the Image Alt Text Generator.
  2. Upload your image, or type a short description of it.
  3. Optionally add a keyword, such as gaming pc.
  4. Click Generate Alt Text.
  5. Pick the most accurate option, edit if needed and paste it into your CMS.

What good alt text looks like

Good alt text describes the image as you would to someone on the phone. It is specific, short and useful.

  • Weak: image
  • Weak: gaming pc gaming pc best gaming pc
  • Good: Gaming PC with RGB fans and a glass side panel on a wooden desk
  • Good: Woman wearing a green embroidered lawn suit standing in a garden

Aim for about 8 to 15 words. Skip phrases like image of or picture of because screen readers already announce images.

When to include keywords

Include your keyword only when it describes the image honestly. A photo of a red Nike running shoe can naturally include red running shoes. A photo of your office team should not include cheap shoes Lahore. Google rewards accurate descriptions, not forced ones.

Where alt text is used

  • Screen readers read it aloud to visually impaired users.
  • Google Images uses it to understand and rank images.
  • Browsers show it when an image fails to load.
  • Linked images use the alt text like anchor text for the link.

Check your existing images

Before writing new alt text, find the images that are missing it. The Image Alt Text Checker and the Image SEO Analyzer both list every image on a page and show which ones need work. Then use this generator to fill the gaps quickly.

A real example

An online plant nursery in Islamabad had over two hundred product photos with no alt text. Using the generator with product names as keywords, the team wrote alt text for every image in one afternoon. Within a couple of months, several product images began appearing in Google Images for searches like indoor money plant pot, sending new visitors directly to product pages.

Common mistakes to avoid

  • Using the same alt text on every product photo.
  • Writing very long paragraphs. Keep it short and specific.
  • Describing decorative images. Use an empty alt attribute for dividers and backgrounds.
  • Trusting AI blindly. Always check that the description matches the actual image.

Frequently asked questions

Is uploaded image data stored

The image is sent only to create the description and is not saved in a gallery on our site.

Can AI read text inside images

It can often describe visible text, but for important text such as prices, write it yourself to be safe.

How long should alt text be

Usually 8 to 15 words, or around 125 characters, is enough.

Write better alt text now with the free Image Alt Text Generator.

🖼️Free tool: Image Alt Text GeneratorUpload an image and get descriptive, SEO-friendly alt text written by AI.Use it free → ← All articles