--- title: "Alt text generator for every image on your site | Fimo" url: "https://fimo.ai/agents/image-seo" description: "The SEO agent in Fimo writes alt text for every image, gives files descriptive names and keeps your image sitemap current, so Google Images can find you." --- [Agents](/features/agents) [SEO](/agents/seo) Image SEO # Alt text for every image, _written for you_. Images without alt text, files named IMG\_4821.jpg. Your [SEO agent](/agents/seo) writes alt text for every image, names files clearly and keeps your image sitemap current. --- ## What is alt text? Alt text is a short written description of an image, stored in the page’s code. Screen readers read it aloud to people with a visual impairment, browsers show it when the image fails to load, and it [helps search engines understand what the image shows](/features/seo-geo). Google says it uses alt text along with computer vision and the content of the page, which makes it the core of Google Images SEO. acme.com | Issue | Images | | --- | --- | | Missing alt textFix ready | 212 | | Files named IMG\_4821.jpgFix ready | 340 | | In good shape | 716 | --- ## Why image SEO is worth the effort. Images are searched too: in Google Images, and in the image results that appear in regular searches. Google can only show your images there if it understands them, and alt text, file names and the image sitemap are how it does. The same alt text makes your visual content usable for people who rely on screen readers, which is where accessibility and SEO meet. Yet on most sites, images are the part nobody finishes. - 53.1% of home pages have images with no alt text. - 16.2% of all images on home pages are missing alt text. - 66.6 images on the average home page, each one needing a description. [Source: WebAIM Million, accessibility analysis of 1,000,000 home pages (2026)](https://webaim.org/projects/million/) --- ## How it works. On every publish, four steps. You only do the last one. 1. ### Reads every image The SEO agent lists every image on your site with its alt text, its file name and whether it appears in your image sitemap. 2. ### Looks at what each image shows It looks at the image itself and at the text around it, so the description fits both the picture and the page. 3. ### Writes the fixes It adds alt text where it is missing or vague, proposes descriptive file names, and keeps an image sitemap that lists every image worth finding. 4. ### You approve, or it publishes The changes wait in a preview with a short report: publish them, edit them, or turn them down. Or switch the routine to automatic and the SEO agent publishes them itself. Every version is kept. --- ## Before and after. One photo in a guide, and what changes once the SEO agent fixes it. The fixes are highlighted. /guides/rewax-a-jacket - **Alt text: what screen readers and Google read**: Before:Missing - After:“Hands rubbing wax into the sleeve of a green waxed jacket” - **File name: the image’s address**: Before:IMG_4821.jpg - After: rewax-waxed-jacket-sleeve.jpg - **Image sitemap: the list of images Google reads**: Before:Not listed, so Google rarely shows it in image results - After: Listed, with the page it belongs to --- ## What you get. - ### Found in Google Images Your screenshots, products and illustrations show up in image results, with a link back to your page. - ### A site everyone can use People who rely on screen readers hear what each image shows, instead of a file name or nothing at all. - ### No image left behind Fimo already writes alt text when an image is uploaded. The SEO agent covers every image already on the site, and keeps checking. --- ## Alt text best practices. The rules the SEO agent follows for every description it writes. - ### Describe what matters Say what the image shows that is useful to the reader, not every detail. A chart needs its message, a product photo its name and color. - ### Use the context of the page The same photo of a jacket can mean “waxed cotton up close” in one guide and “a jacket for rainy days” in another. Good alt text follows the page. - ### Keep it short and direct One clear sentence is usually enough. Skip “image of” or “picture of”: screen readers already announce that it is an image. - ### Use keywords naturally A relevant word is welcome when it describes the image. Google warns that filling alt attributes with keywords can make a site look like spam. --- ## What it checks. Everything that helps search engines find and understand your images. - ### Alt text Like an image alt text checker that never stops: missing alt text, vague descriptions like “photo” or “banner”, and alt text stuffed with keywords. - ### File names Generic names from cameras and design tools, replaced with short descriptive names that say what the image is. - ### Image sitemap Every image worth finding listed in your image sitemap, so Google discovers images it might otherwise miss. - ### Dimensions Images declared with their width and height in the img tag, so the page does not jump while they load. --- ## Works with your tools. The SEO agent reads your images itself. Search Console shows how they perform, Semrush or Ahrefs add their audits. - ![](https://increasing-magenta-albatross-5c363716c5.fimo.site/uploads/2026/10/14/RjAOwoMo-search.google.com.png) Search Console - ![](https://increasing-magenta-albatross-5c363716c5.fimo.site/uploads/2026/10/14/QMzXTo9x-semrush.com.png) SEMrush - ![](https://increasing-magenta-albatross-5c363716c5.fimo.site/uploads/2026/10/14/vg6ALI2--ahrefs.com.png) Ahrefs --- ## Works well with. The routines that pick up where Image SEO stops. - [ ### Meta tags Titles and descriptions: missing, duplicate, too long. ](/agents/meta-tags) - [ ### Technical SEO Indexing, sitemap, redirects, headings. ](/agents/technical-seo) - [ ### Internal linking Orphan pages found, links placed in context. ](/agents/internal-linking) --- ## Questions about image SEO. Straight answers. ### Is the SEO agent an alt text generator? Yes, for your whole site at once. Most alt text generator tools describe one image at a time, after you upload it. Fimo already writes alt text for every new upload, and the SEO agent goes back over every image already on your pages, rewrites vague descriptions, and keeps them accurate when the page around them changes. ### Is AI alt text good enough? It is when it looks at the page as well as the image. AI alt text that only sees the picture tends to describe it literally, “a group of people at a table”, and misses why it is there. The SEO agent reads the surrounding text too, so the description matches the point the page is making. The changes go live on their own or after your approval. ### How do I optimize images for SEO? Follow a few image SEO best practices: write descriptive alt text, give files short descriptive names, list your images in an image sitemap, declare their dimensions, and keep the image size light by compressing images, so pages load fast even with high quality images. Place each image near the text it illustrates. The SEO agent handles the first four on every publish; image compression is handled by the performance agent. [Source: Google Search Central, “Image SEO best practices”](https://developers.google.com/search/docs/appearance/google-images) ### Can it check the alt text I already have? Yes. Like an image alt text checker, it reviews every image on the site and flags what is missing, vague or stuffed with keywords. The difference is that it also writes the replacement, and checks again each time you publish. ### Do I need an image sitemap? It helps, especially for images Google might not find on its own, like images loaded by scripts or hosted on another domain. Google says an image sitemap lets you point it to images it might not have otherwise discovered. The SEO agent keeps yours current as you add and remove images. [Source: Google Search Central, “Image SEO best practices”](https://developers.google.com/search/docs/appearance/google-images) ### Does the image title attribute matter for SEO? Much less than alt text. The image title attribute mostly shows a small tooltip when someone hovers over the image, and Google’s image guidelines do not mention it among the elements it uses. Write good alt text and file names first; a title attribute is optional. [Source: Google Search Central, “Image SEO best practices”](https://developers.google.com/search/docs/appearance/google-images) ### How is this different from the accessibility agent? They work together. Image SEO owns alt text, because it serves both search engines and screen readers. The accessibility agent covers the rest: color contrast, headings, labels and keyboard navigation. ### Which plan includes it? Every plan, Free included: the SEO and GEO agents run on all plans. Paid plans add more AI credits and agent-hours. See the pricing page for the details. --- ## Where to next. [ ### Agent library Every ready-made agent and what it runs on its own, from SEO and GEO to content and compliance. Add yours in plain words. ](/features/agents)[ ### Website Autopilot Agents and your team, side by side. Agents improve the site on their own, and every version is kept, so you can always go back. ](/features/autonomous-agents) --- ## Start with your website. Try Fimo online in seconds. Connect your site when you are ready. [Try Fimo for free](/auth/sign-up) Book a demo