Image Alt Text Generator That Reads Your Actual Images
Paste image URLs or type descriptions, one per line, and get 5 to 15 word alt text based on what is actually in each picture, ready to paste.
2 credits per run. 20 free credits when you sign up, no credit card required.
4 image URLs · keyword: running shoes
Example1. Red mesh running shoe on a white background
2. Runner lacing trail running shoes on a rocky path
3. Close-up of a cushioned running shoe sole
4. Shop window sign reading Spring Sale 20% Off
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.
- Step 1
Describe what you need
A few details about your business, audience and goal.
- Step 2
AI writes the first draft
Tailored to your inputs and the platform it is for, in seconds.
- 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.
Written From the Picture
Paste an image URL and the AI looks at the image itself, describing the subject, action, setting and any visible text.
Many Images in One Run
Enter up to 20 lines, mixing image URLs and descriptions, and get a numbered alt text line for each, in the same order.
Keywords Only Where They Fit
Add an optional primary keyword and it is used only in lines where it truly describes the image, never stuffed into every one.
The guide
What the image alt text generator does, how to use it, and what to do with the result.
An image alt text generator looks at your pictures and writes the alt text that describes them for screen readers and search engines. Paste up to 20 lines, each one a public image URL or a short description, and add an optional primary keyword. Up to 10 image URLs per run are downloaded, and the AI describes what is actually in each picture: the subject, the action, the setting and any text in the image. You get back a numbered list with one 5 to 15 word alt text line per image, in the same order you entered them, with your keyword used only where it fits.
How to Use the Image Alt Text Generator
Put one image on each line of the box. A line can be a full image URL starting with http or https, such as https://example.com/images/red-running-shoe.jpg, or a plain description like "woman pouring coffee at a wooden kitchen table". You can mix both in the same run. To get an image URL, right-click the picture in your browser and choose Copy image address. Add a primary keyword if the page targets one, such as "organic coffee beans", or leave it empty for team photos and blog images where a keyword would feel forced. Run the tool and you get a numbered list that matches your order, so line 3 in your input is line 3 in the result. Check each line against the real image before you paste it into your alt field.
Alt Text From an Image URL: What Works
For each URL line, the generator downloads the image and shows it to the AI, so the alt text comes from the picture itself rather than the file name. The image must be at a public address anyone can open, in JPG, PNG, WebP or GIF format, and 5 MB or smaller. Up to 10 image URLs are opened per run, and you can enter up to 20 lines in total. If a link cannot be opened, for example it returns a 404 error, points to a private address, is not an image or is over 5 MB, that line is written from its file name instead, and the notes under the result say which line failed and why. A vague name like photo.jpg gets "Could not open this image. Add a one-line description instead." rather than a guess.
What the Alt Text Results Look Like
Each result is a numbered line in the format "1. alt text", one for every line you entered. Every alt text is 5 to 15 words long, which is enough to name the main subject and one or two useful details without becoming a caption. For images the AI could see, it describes what is visible, including any words printed in the picture, such as a sale banner or a product label. It does not start lines with "image of" or "picture of", because screen readers already announce that an image is there. If you supplied a keyword, it appears only in lines where it truly describes the image, so a product shot may carry it while a lifestyle photo may not. The output is plain text you can paste into a CMS alt field or into alt="..." on an img tag.
How to Write Good Alt Text for Images
Good alt text describes the image for someone who cannot see it and gives search engines the same context. Lead with the subject, add the detail that matters for the page, and stop. Here are three examples in the style the generator writes. For a product page: "Green ceramic coffee mug with a bamboo lid on a desk". For a recipe blog: "Sliced banana bread loaf on a cooling rack". For a services page: "Plumber fitting a new kitchen sink tap". Each one names a clear subject, adds one or two specifics, and stays short. If an image contains important text, such as an offer on a banner, include those words. If an image is purely decorative, such as a divider or background pattern, leave its alt attribute empty instead of describing it.
Alt Text for WordPress, Shopify, Etsy and Instagram
The same alt text works wherever you publish. In WordPress, open an image in the Media Library, copy its file URL into the generator, then paste the result into the Alternative Text box, not the title or caption. In Shopify, open a product image, copy its address from the storefront with right-click, and add the result as the image's alt text. Etsy sellers can copy a listing photo's image address the same way and paste the alt text in the listing editor. On Instagram, use the advanced settings when posting to write your own alt text instead of the automatic version. Because one run handles up to 20 lines, you can prepare alt text for a whole product gallery or long blog post at once, then paste each line where it belongs.
Common Alt Text Mistakes and What to Check Next
The most common mistake is keyword stuffing, such as repeating "cheap running shoes" on every image. It reads badly for screen reader users and does not help rankings. The second is copying the file name, like IMG_4821, which tells nobody anything. The third is writing the same alt text for every photo in a gallery. Others include very long alt text that reads like a caption and adding alt text to purely decorative graphics. Always read the result against the real picture, since AI can misjudge small details like brand names or exact colors. To find which images need alt text in the first place, run the page through our image alt text checker, which counts images missing alt attributes, then use this generator to write the missing lines.
Frequently asked questions
Something else? Email support@brainito.com
Can AI generate alt text from an image?
Yes. Paste a public image URL and the generator downloads the picture and has the AI describe what it shows: subject, action, setting and any text in the image. Up to 10 image URLs are opened per run, in JPG, PNG, WebP or GIF format up to 5 MB.
How do I get an image URL?
Right-click the image in your browser and choose Copy image address, then paste it on its own line. In WordPress you can also copy the file URL from the Media Library. The address must start with http or https and be publicly viewable.
Can I upload an image file from my computer?
No, there is no file upload. The generator reads images from public URLs only. For a photo that is not online yet, type a one-line description of it instead, and the generator turns that description into alt text.
What happens if an image link does not work?
That line is written from its file name, and the notes under the result say which line failed and why, such as a 404 error or a file over 5 MB. If the name says nothing, you get a request to add a one-line description.
How long should alt text be?
Short enough to read in one breath. This generator writes each alt text at 5 to 15 words, which covers the main subject and a key detail. Longer explanations, such as the data in a chart, belong in the surrounding page text instead.
How much does the image alt text generator cost?
Each run costs 2 credits, and new accounts get 20 free credits. One run can cover up to 20 lines, including up to 10 image URLs, so a whole gallery fits in a single run. You need a Brainito account to use it.
Where to go from here
The image alt text generator answers one question. These are the next ones worth asking.
Turn your images into clear, ready-to-paste alt text
One account unlocks the image alt text generator plus 320+ marketing tools, weekly audits and your action plan.
- 20 free credits when you sign up
- 2 credits per run
- No credit card required