Image Sitemap: Google's Official Syntax, Examples and When You Need One

An image sitemap is one of the few levers that tells Google directly which images matter on your site. Google's image sitemap documentation (last updated December 2025) sets the rules, and they became much simpler after 2022. Many guides still show tags that Google no longer reads. This one sticks to the official syntax, explains when a sitemap helps and when it changes nothing, and lists the mistakes that keep images out of the index.

What is an image sitemap?

An image sitemap is a standard XML sitemap extended with image entries. Each url element still points to a page, and inside it you list the images that appear on that page. Google uses the file as a discovery hint: in its Google Images best practices (updated March 2026), it explains that you can provide "the URL of images we might not have otherwise discovered by submitting an image sitemap."

Two points are often misunderstood:

• It does not have to be a separate file. Google accepts image tags inside your existing sitemap or in a dedicated sitemap; both work the same way.
• It helps discovery, not ranking. Once an image is found, Google ranks it on the page context: alt text, file name, caption, nearby text and page quality. Our guide to image SEO covers those signals.

What is the official image sitemap syntax?

Here is the format Google documents, with one page holding two images and a second page holding one:

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
    xmlns:image="http://www.google.com/schemas/sitemap-image/1.1">
  <url>
    <loc>https://example.com/sample1.html</loc>
    <image:image>
      <image:loc>https://example.com/image.jpg</image:loc>
    </image:image>
    <image:image>
      <image:loc>https://example.com/photo.jpg</image:loc>
    </image:image>
  </url>
  <url>
    <loc>https://example.com/sample2.html</loc>
    <image:image>
      <image:loc>https://example.com/picture.jpg</image:loc>
    </image:image>
  </url>
</urlset>

Each element has a precise role:

The general sitemap limits still apply: Google's sitemap guide caps a single file at 50MB uncompressed or 50,000 URLs. A large catalogue with many images per page reaches the size limit faster, so split it and group the files in a sitemap index. The same guide notes that Google ignores priority and changefreq, and uses lastmod only when it is consistently accurate.

Which image sitemap tags did Google remove?

On May 6, 2022, Google announced in its "spring cleaning" post that it would stop supporting four image tags, effective August 6, 2022. Leaving them in a file causes no error, but they carry no value for Google.

When do you need an image sitemap?

For a small blog whose images sit in plain img elements, Google finds them by crawling the page and a dedicated sitemap adds little. The value grows when discovery is uncertain or when images bring business:

JavaScript is the most common reason. If a slider only injects its images after a click or a swipe, Googlebot may never see them. Google's guide to lazy-loaded content asks that images load when they enter the viewport, without relying on scrolling or clicking, and that their URLs appear in the src attribute of the rendered HTML. Fix the rendering first (see our article on JavaScript SEO), then use the sitemap as a safety net.

How to create an image sitemap in 5 steps

1. Choose which images to list

List original images that carry information: product photos, project photos, diagrams, infographics, recipe steps. Leave out icons, logos repeated on every page, spacers and generic stock photos. Run an alt text checker on the pages concerned at the same time: an image found without a description is hard to rank.

2. Check what your platform already generates

Open your sitemap and search for image:image. The default WordPress sitemap (wp-sitemap.xml) does not list images. Rank Math has an option to include images in its sitemaps, and Yoast SEO adds images found in post content. Shopify product sitemaps carry image entries, but merchants report that usually only the main product image appears, so stores with many photos per product often use an app or a custom file. For a custom site, generate a base file with an XML sitemap generator and add the image entries from your database or media library.

3. Write clean entries

• Use the canonical page URL in loc, never a redirected or noindex URL.
• Use absolute image URLs (https://...) that return a 200 status.
• List an image under each page where it appears if several pages use it.
• Serve compressed files: a light image loads faster for users and crawlers. An image compressor handles JPEG, PNG and WebP.

4. Make the images crawlable

If the images sit on a CDN, Google recommends verifying that domain in Search Console as well. Check that robots.txt does not block the image folder or the CDN path with a robots.txt checker, and that the image URLs do not require cookies or a login.

5. Validate and submit

Test the file with a sitemap checker to catch invalid XML, a missing namespace or broken URLs. Then submit it in Search Console (Indexing, then Sitemaps) and add a Sitemap: line in robots.txt. Our step-by-step guide on how to submit a sitemap to Google explains every status in the report.

What are the most common image sitemap mistakes?

To check the result, filter the Search Console performance report by search type "Image" a few weeks after submission and compare impressions on the pages concerned before and after.

Image sitemaps, Google Images and the AIs

Images are a search channel of their own: Google Images, Google Lens and visual search all start from images Google has discovered and indexed. For online stores, a product photo that appears in image results is a second way into the product page.

For ChatGPT, Gemini, Perplexity or Claude, the sitemap matters less than the words around the image. These assistants mostly read text: they understand an image through its alt text, its caption and the paragraph that explains it. The sitemap gets the image found; the text gets it understood and quoted. A chart with a clear caption and a sentence stating the key figure is far more likely to be reused in an AI answer than the same chart with an empty alt attribute.

This is the approach behind the Sorank article generator: each article is written for Google and the AIs, published with its images and their alt text, then sent to your WordPress, Shopify, Webflow or Wix site, whose sitemap picks it up automatically. To check the images and tags of any page in one click, install the free Sorank Chrome extension.

Is an image sitemap worth it for your site?

If your images live in clean img elements on well-linked pages, Google will find them without help, and your time is better spent on alt text, file names and compression. If they load with JavaScript, sit on a CDN or bring customers, an image sitemap with only image:image and image:loc is a quick, low-risk fix: list the original images, check that they are crawlable, then submit the file and watch image impressions in Search Console. To publish illustrated articles regularly without writing them by hand, see the Sorank plans, from $49 per month billed annually, with a 3-day free trial.