Figma plugin
Search SketchValley illustrations and drop them straight into your Figma frames.
- Search the whole library inside Figma
- Inserts editable vectors, not flat images
- Free, no account needed
Free AI Alt Text Generator for Images
Add one image or twenty and get accessible, SEO-friendly alt text in seconds — three styles per image, plus a caption, title and SEO file name. Add a focus keyword, choose from 18 languages, then copy the HTML or download a CSV.
Free · no signup · images are never stored
Length
No image handy?
How to generate alt text for images
1
Add your images
Drop up to 20 images, paste one from your clipboard, or paste a link to an image. Large photos are resized in your browser first.
2
Give it context
Say where the image is used and add a focus keyword — “product photo for a coffee shop” gives far better alt text than the image alone. Pick a language and length.
3
Pick, edit and export
Choose from three styles, edit the text if you like, then copy it, copy a ready-made <img> tag, or download a CSV with alt text, captions and file names.
What is alt text for images?
Alt text (alternative text) is a short description added to an image’s HTML with the alt attribute. Screen readers read it aloud to blind and low-vision visitors, browsers show it when an image fails to load, and search engines use it to understand what the image shows — which helps your images appear in Google Images.
<img src="ceramic-mug-latte.jpg" alt="Speckled ceramic mug of latte with heart-shaped foam art on a wooden table">Good alt text“Woman smiling while working on a laptop in a sunny coffee shop”
Weak alt text“image1.jpg”, “photo”, “laptop woman coffee shop work remote freelance”
How to write good alt text
Be specific“Red bicycle leaning against a brick wall”, not “bicycle”.
Lead with what mattersPut the subject and action first; screen-reader users can stop listening at any point.
Include text in the imageIf an image shows a sign, quote or slide, the alt text should include those words.
Skip “image of”Screen readers already announce it as an image. Say “Illustration” or “Chart” only when it matters.
Keywords only if trueUse a keyword once, naturally. Stuffed alt text hurts accessibility and can look spammy to Google.
Empty alt for decorationUse
alt="" for purely decorative images so screen readers skip them.Alt text character limit — how long should it be?
HTML has no length limit for alt text, and modern screen readers read it in full. Around 125 characters is a widely used guideline because short alt text is quicker to listen to, and some older assistive software split long alt text into chunks. Aim to be as short as possible while still conveying what matters; put longer explanations in a caption or the page text.
50–125Characters for most images
1Focus keyword, at most, used naturally
alt=""For purely decorative images
Each result shows a live character count while you edit, and the Length setting keeps alt text short, standard or detailed.
Alt text vs title vs caption
| Who sees it | Use it for | |
|---|---|---|
| Alt text | Screen-reader users, search engines, anyone when the image fails to load | Describing what the image shows |
| Caption | Everyone, shown under the image | Extra context, credits, longer explanations |
| Title attribute | Mouse users on hover (rarely read aloud) | Optional tooltip — never a replacement for alt text |
| File name | Search engines | A short, descriptive, hyphenated name like ceramic-mug-latte.jpg |
Frequently asked questions
What is alt text for images?
Alt text is a short written description of an image, added to the HTML img tag with the alt attribute. Screen readers read it aloud to people who can’t see the image, and search engines use it to understand what the image shows.
How long should alt text be?
There is no hard limit, but most good alt text is 50–125 characters. Keep it as short as possible while still describing what matters. If an image needs a longer explanation, such as a detailed chart, put the details in a caption or the surrounding text.
Does alt text help SEO?
Yes. Google uses alt text, along with the page text and file name, to understand images. Accurate, specific alt text helps images appear in Google Images and supports the page’s relevance. Use a keyword only where it naturally describes the image.
Should every image have alt text?
Every informative image should. Purely decorative images, such as background textures or dividers, should have an empty alt attribute (alt="") so screen readers skip them. The generator flags images that look decorative.
Can I generate alt text for many images at once?
Yes. Add up to 20 images at a time. You get alt text, a caption, a title and an SEO-friendly file name for each, and can copy them as HTML or download a CSV.
What languages are supported?
Alt text, captions and titles can be written in 18 languages, including English, Spanish, French, German, Portuguese, Hindi, Arabic, Japanese and Chinese.
Where do I add alt text in WordPress or Shopify?
In WordPress, select the image and fill in “Alternative Text” in the block sidebar or Media Library. In Shopify, open the product media, click the image and choose “Add alt text”. In HTML, add alt="…" to the img tag.
Are my images stored?
No. Images are resized in your browser and sent to our AI provider only to write the text. They are not saved on our server or used for anything else.