50000 URLs & 50MB Google XML Sitemap File Size Limit: A Comprehensive Guide to Boost Your SEO

An XML (Extensible Markup Language) sitemap is a file containing a structured list of all the important URLs on your website. It provides search engines with essential information about the structure of your site, making it easier for them to crawl, index, and understand your content.

XML Sitemaps Definition and Purpose

The primary purpose of an XML sitemap is to improve the visibility and discoverability of your website’s pages by search engines. By providing a roadmap of your site, you help search engines like Google and Bing to find and index new or updated content more efficiently.

Image: A visual representation of an XML sitemap showing the hierarchical structure of a website.

Benefits for SEO

XML sitemaps play a crucial role in search engine optimization (SEO). They offer several benefits, including:

1. Faster indexing: With an XML sitemap, search engines can quickly discover new or updated pages on your website, leading to faster indexing and better visibility in search results.
2. Improved crawl efficiency: An XML sitemap helps search engines prioritize which pages to crawl, resulting in more efficient use of their resources and better coverage of your website’s content.
3. Better content understanding: XML sitemaps provide additional information about your pages, such as the last modification date, priority, and change frequency, helping search engines to better understand and index your content.
4. Enhanced user experience: By ensuring that search engines have access to all relevant pages, XML sitemaps help deliver more accurate search results to users, improving their overall experience with your website.

Image: A graphic illustrating the benefits of XML sitemaps for SEO.

Difference between XML and HTML sitemaps

While both XML and HTML sitemaps serve the purpose of guiding visitors and search engines through your website, they are designed for different audiences.

An XML sitemap is specifically designed for search engines, providing a structured and machine-readable list of URLs. It contains metadata about each page, such as the last modification date and priority, to help search engines understand and index your content more efficiently.

On the other hand, an HTML sitemap is created for human visitors to your website. It offers a user-friendly overview of your site’s structure, typically organized in a hierarchical format with links to all important pages. An HTML sitemap can improve user experience by helping users navigate your site more easily and find the information they’re looking for.

Image: A side-by-side comparison of an XML sitemap and an HTML sitemap.

Creating an XML Sitemap

Manual creation

You can create an XML sitemap manually by writing the necessary XML code in a text editor, such as Notepad or Sublime Text. The basic structure of an XML sitemap consists of the following elements:

• <urlset>: This is the root element that contains the entire list of URLs.
• <url>: Each URL on your website is represented by a separate <url> element within the <urlset>.
• <loc>: This element contains the URL of a specific page on your website.

Here’s a simple example of an XML sitemap with two URLs:

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <url>
      <loc>https://www.example.com/page1</loc>
   </url>
   <url>
      <loc>https://www.example.com/page2</loc>
   </url>
</urlset>

Save the file with a .xml the extension (e.g., sitemap.xml) and upload it to your website’s root directory.

Sitemap generator tools

Creating an XML sitemap manually can be time-consuming, especially for large websites with many pages. Luckily, there are several online sitemap generator tools that can automatically create an XML sitemap for you. Some popular options include:

• XML-Sitemaps.com
• Screaming Frog SEO Spider
• Yoast SEO plugin for WordPress

These tools typically require you to enter your website’s URL, and they will then crawl your site and generate an XML sitemap file that you can download and upload to your website.

WordPress plugins for XML sitemaps

If your website is built on WordPress, there are several plugins available that can automatically generate and maintain an XML sitemap for you. Some popular choices include:

• Yoast SEO
• Google XML Sitemaps
• All in One SEO Pack

These plugins not only create an XML sitemap but also keep it up-to-date as you add, update, or delete content on your website. They also offer additional features, such as the ability to customize the priority and change frequency of your pages.

Sitemap structure and syntax

An XML sitemap should follow a specific structure and syntax, as defined by the Sitemaps.org protocol. In addition to the <loc> element, you can also include optional elements to provide more information about your pages:

• <lastmod>: The date when the page was last modified, in the format YYYY-MM-DD.
• <changefreq>: An estimate of how frequently the page is likely to change (e.g., always, hourly, daily, weekly, monthly, yearly, or never).
• <priority>: A value between 0.0 and 1.0 that indicates the priority of a page relative to other pages on your site. Higher values mean higher priority.

Here’s an example of an XML sitemap with additional metadata:

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <url>
      <loc>https://www.example.com/page1</loc>
      <lastmod>2022-01-01</lastmod>
      <changefreq>monthly</changefreq>
      <priority>0.8</priority>
   </url>
   <url>
      <loc>https://www.example.com/page2</loc>
      <lastmod>2022-01-15</lastmod>
      <changefreq>weekly</changefreq>
      <priority>0.5</priority>
   </url>
</urlset>

Make sure to validate your XML sitemap using an XML validator to ensure that it follows the correct syntax and structure.

XML Sitemap Elements

An XML sitemap consists of several elements that provide information about your website’s pages to search engines. In this section, we’ll discuss the key elements in detail and explain their purpose.

<urlset> element

The <urlset> element is the root element that contains the entire list of URLs in your XML sitemap. It must include the xmlns attribute, which specifies the XML namespace for the sitemap protocol (http://www.sitemaps.org/schemas/sitemap/0.9).

Here’s an example of the <urlset> element:

<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <!-- List of URL elements goes here -->
</urlset>

<url> element

The <url> element represents a single URL on your website. Each URL on your site should have its own <url> element, nested within the <urlset> element. The <url> element can contain several child elements, such as <loc>, <lastmod>, <changefreq>, and <priority>.

<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <url>
      <!-- URL details go here -->
   </url>
</urlset>

<loc> element

The <loc> element contains the URL of a specific page on your website. It is a required child element of the <url> element. The URL must be fully qualified, including the protocol (http or https) and domain name.

Here’s an example of a <loc> element:

<url>
   <loc>https://www.example.com/page1</loc>
</url>

<lastmod> element

The optional <lastmod> element specifies the date when the page was last modified. This information can help search engines determine when to recrawl a page. The date should be in the format YYYY-MM-DD, although more specific formats, such as including the time (YYYY-MM-DDThh:mm:ss+TZD), are also allowed.

Here’s an example of a <lastmod> element:

<url>
   <loc>https://www.example.com/page1</loc>
   <lastmod>2022-01-01</lastmod>
</url>

<changefreq> element

The optional <changefreq> element provides an estimate of how frequently the content of a page is likely to change. This information helps search engines decide how often to recrawl a page. The accepted values are always, hourly, daily, weekly, monthly, yearly, and never.

Here’s an example of a <changefreq> element:

<url>
   <loc>https://www.example.com/page1</loc>
   <changefreq>monthly</changefreq>
</url>

<priority> element

The optional <priority> element indicates the priority of a page relative to other pages on your website. The value should be a number between 0.0 (lowest priority) and 1.0 (highest priority). This information can help search engines prioritize which pages to crawl and index first.

Here’s an example of a <priority> element:

<url>
   <loc>https://www.example.com/page1</loc>
   <priority>0.8</priority>
</url>

<image:image> and <video:video> elements

You can also include additional elements for images and videos within the <url> element, using the <image:image> and <video:video> elements, respectively. These elements require separate namespaces in the <urlset> element:

• For images: xmlns:image="http://www.google.com/schemas/sitemap-image/1.1"
• For videos: xmlns:video="http://www.google.com/schemas/sitemap-video/1.1"

Here’s an example of an XML sitemap with image and video elements:

<?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"
        xmlns:video="http://www.google.com/schemas/sitemap-video/1.1">
   <url>
      <loc>https://www.example.com/page1</loc>
      <image:image>
         <image:loc>https://www.example.com/images/image1.jpg</image:loc>
      </image:image>
      <video:video>
         <video:content_loc>https://www.example.com/videos/video1.mp4</video:content_loc>
         <video:title>Example Video</video:title>
         <video:description>A sample video description.</video:description>
      </video:video>
   </url>
</urlset>

These elements provide search engines with additional information about the media content on your pages, helping them index your images and videos more effectively.

Optimizing Your XML Sitemap

To maximize the effectiveness of your XML sitemap and improve your website’s visibility in search engine results, it’s essential to optimize your sitemap. In this section, we’ll discuss various strategies for optimizing your XML sitemap.

Prioritizing important pages

Use the <priority> element to indicate the relative importance of each page on your website. Assign higher priority values (closer to 1.0) to your most important pages, such as your homepage, key product pages, and high-quality content. Assign lower priority values (closer to 0.0) to less important pages, such as contact forms or legal disclaimers.

By prioritizing your pages, you help search engines understand which content is most valuable and should be crawled and indexed first.

<url>
   <loc>https://www.example.com/important-page</loc>
   <priority>1.0</priority>
</url>

Removing low-value pages

Your XML sitemap should only include pages that provide value to users and search engines. Exclude low-value pages, such as duplicate content, thin content, or pages with sensitive information. By removing these pages from your sitemap, you ensure that search engines focus their crawling resources on indexing the most valuable content on your website.

Handling large websites and sitemap index files

For large websites with thousands of pages, it’s important to organize your XML sitemap efficiently. According to the sitemap protocol, a single XML sitemap can contain up to 50,000 URLs and be no larger than 50MB uncompressed.

If your website exceeds these limits, you can create multiple XML sitemaps and use a sitemap index file to list them all. A sitemap index file is an XML file that contains one <sitemap> element for each individual sitemap. Here’s an example of a sitemap index file:

<?xml version="1.0" encoding="UTF-8"?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <sitemap>
      <loc>https://www.example.com/sitemap1.xml</loc>
   </sitemap>
   <sitemap>
      <loc>https://www.example.com/sitemap2.xml</loc>
   </sitemap>
</sitemapindex>

Submit the sitemap index file to search engines instead of the individual sitemaps.

Keeping your sitemap up-to-date

An outdated XML sitemap can negatively impact your website’s visibility in search engine results. Make sure to update your sitemap regularly as you add, update, or remove content on your website. If you’re using an online sitemap generator tool or a WordPress plugin, these updates may be automated.

In addition to updating your sitemap, use the <lastmod> element to indicate the last modification date for each page. This information helps search engines determine when to recrawl a page based on its freshness.

<url>
   <loc>https://www.example.com/page1</loc>
   <lastmod>2022-01-15</lastmod>
</url>

By following these optimization strategies, you can ensure that your XML sitemap effectively communicates your website’s structure and content priorities to search engines, leading to better crawl efficiency and improved search rankings.

Submitting Your XML Sitemap to Search Engines

Once you’ve created and optimized your XML sitemap, the next step is to submit it to search engines. This process ensures that search engines are aware of your sitemap and can use it to crawl and index your website more efficiently.

Google Search Console

Google Search Console is a free service provided by Google that helps you monitor, maintain, and troubleshoot your website’s presence in Google Search results. To submit your XML sitemap to Google, follow these steps:

1. Sign in to Google Search Console.
2. If you haven’t already, add and verify your website as a property.
3. In the left sidebar, click “Sitemaps.”
4. In the “Add a new sitemap” section, enter the URL of your XML sitemap (e.g., https://www.example.com/sitemap.xml) and click “Submit.”

Google will now crawl your XML sitemap and use it to discover and index your website’s pages. You can also view the status of your submitted sitemap, such as any errors or warnings, within Google Search Console.

Bing Webmaster Tools

Bing Webmaster Tools is a similar service provided by Microsoft for websites appearing in Bing search results. To submit your XML sitemap to Bing, follow these steps:

1. Sign in to Bing Webmaster Tools.
2. If you haven’t already, add and verify your website as a property.
3. In the left sidebar, click “Sitemaps.”
4. In the “Submit a Sitemap” section, enter the URL of your XML sitemap (e.g., https://www.example.com/sitemap.xml) and click “Submit.”

Bing will now crawl your XML sitemap and use it to discover and index your website’s pages.

Yandex Webmaster

Yandex Webmaster is a service provided by Yandex, the leading search engine in Russia. To submit your XML sitemap to Yandex, follow these steps:

1. Sign in to Yandex Webmaster.
2. If you haven’t already, add and verify your website as a property.
3. In the left sidebar, click “Indexing Options” and then “Sitemap files.”
4. Click “Add” and enter the URL of your XML sitemap (e.g., https://www.example.com/sitemap.xml), then click “Add.”

Yandex will now crawl your XML sitemap and use it to discover and index your website’s pages.

Other search engines and directories

While Google, Bing, and Yandex are the most popular search engines globally, there may be other search engines or directories relevant to your website’s target audience. Check their documentation or webmaster guidelines for instructions on how to submit your XML sitemap.

By submitting your XML sitemap to search engines, you ensure that they can efficiently crawl and index your website, improving your visibility and rankings in search results. Remember to update and resubmit your sitemap whenever significant changes are made to your website’s content or structure.

Monitoring and Troubleshooting XML Sitemaps

After submitting your XML sitemap to search engines, it’s essential to monitor its performance and address any issues that may arise. In this section, we’ll discuss how to check for errors, identify crawling issues, analyze indexation rates, and resolve common sitemap errors.

Checking for errors in Google Search Console

Google Search Console is a valuable tool for monitoring the status of your submitted XML sitemap. To check for errors:

1. Sign in to Google Search Console.
2. Select your website property.
3. In the left sidebar, click “Sitemaps.”
4. Under “Submitted sitemaps,” you can view the status of your sitemap, including the number of discovered URLs, and any errors or warnings.

If Google encounters issues with your sitemap, it will provide details about the errors, such as invalid URLs, incorrect syntax, or unsupported elements. Use this information to fix the issues and resubmit your sitemap.

Identifying crawling issues

Crawling issues can prevent search engines from indexing your website’s pages, even if they’re listed in your XML sitemap. To identify crawling issues, use the “Coverage” report in Google Search Console:

1. In the left sidebar, click “Coverage.”
2. The report provides an overview of the indexing status of your website’s pages, including any errors, warnings, or excluded pages.

Investigate any crawling issues and address them to ensure that search engines can access and index your content. Common crawling issues include blocked URLs (e.g., via robots.txt), server errors, redirect loops, and broken links.

Analyzing sitemap indexation rates

The indexation rate is the percentage of submitted URLs that have been indexed by search engines. A low indexation rate may indicate problems with your XML sitemap or the quality of your website’s content.

To analyze your sitemap’s indexation rate, compare the number of discovered URLs in your sitemap (as reported by Google Search Console) to the number of indexed URLs in search results. You can use the “site:” search operator in Google to find the number of indexed URLs (e.g., site:example.com).

If your indexation rate is low, investigate potential issues with your sitemap, such as incorrect syntax, missing URLs, or low-quality content. Ensure that your website provides valuable and unique content to improve its chances of being indexed.

Resolving common sitemap errors

Here are some common sitemap errors and their solutions:

1. Invalid XML syntax: Ensure that your XML sitemap follows the correct syntax and structure, as defined by the Sitemaps.org protocol. Use an XML validator to check for errors.
2. Duplicate URLs: Remove any duplicate URLs from your sitemap, as they can cause confusion for search engines and waste crawl resources.
3. Non-canonical URLs: Make sure to include only the canonical version of each URL in your sitemap. Non-canonical URLs, such as those with URL parameters or session IDs, should be excluded.
4. Blocked URLs: Ensure that the URLs listed in your sitemap are not blocked by your robots.txt file or meta robots tags. Blocked URLs cannot be crawled or indexed by search engines.
5. 404 errors: Remove any URLs that return a 404 (Not Found) status code from your sitemap. Broken links can negatively impact your website’s user experience and search engine rankings.

By monitoring and troubleshooting your XML sitemap, you can ensure that search engines can efficiently crawl and index your website, leading to better visibility and rankings in search results. Regularly review your sitemap’s performance and address any issues that may arise to maintain its effectiveness.

Best Practices for XML Sitemaps

Creating, optimizing, and maintaining an XML sitemap is crucial for your website’s visibility in search engine results. To ensure that your sitemap effectively communicates your website’s structure and content priorities to search engines, follow these best practices:

Include only important pages

Your XML sitemap should only include pages that provide value to users and search engines. Exclude low-quality or low-value pages, such as duplicate content, thin content, or pages with sensitive information. By focusing on high quality content, you ensure that search engines index the most valuable pages on your website.

Keep your sitemap up-to-date

Regularly update your XML sitemap as you add, update, or remove content on your website. An outdated sitemap can negatively impact your website’s visibility in search engine results. If you’re using a sitemap generator tool or a WordPress plugin, ensure that it automatically updates your sitemap as your website changes.

Use canonical URLs

Include only the canonical version of each URL in your sitemap. Non-canonical URLs, such as those with URL parameters or session IDs, can cause confusion for search engines and waste crawl resources. Implement canonical tags on your website to indicate the preferred version of each URL.

Follow sitemap protocol guidelines

Ensure that your XML sitemap follows the Sitemaps.org protocol, including the correct syntax and structure. A well-structured sitemap helps search engines understand and index your content more efficiently. Use an XML validator to check for errors or inconsistencies in your sitemap.

Compress large sitemaps

If your XML sitemap is close to or exceeds the 50MB size limit, consider compressing it using gzip to reduce its size. Most search engines, including Google and Bing, support gzip-compressed sitemaps. When submitting a compressed sitemap, make sure to use the .xml.gz file extension.

Use sitemap index files for large websites

For large websites with thousands of pages, create multiple XML sitemaps and use a sitemap index file to list them all. This approach helps you stay within the 50,000 URLs and 50MB size limits imposed by the sitemap protocol. Submit the sitemap index file to search engines instead of the individual sitemaps.

Include optional metadata

Include optional metadata elements, such as <lastmod>, <changefreq>, and <priority>, to provide search engines with additional information about your pages. This information can help search engines understand, prioritize, and index your content more effectively.

Submit your sitemap to search engines

Submit your XML sitemap to major search engines, such as Google, Bing, and Yandex, using their respective webmaster tools. This process ensures that search engines are aware of your sitemap and can use it to crawl and index your website more efficiently.

Monitor and troubleshoot your sitemap

Regularly monitor your XML sitemap’s performance using tools like Google Search Console or Bing Webmaster Tools. Identify and address any errors or issues, such as invalid URLs, incorrect syntax, or crawling problems, to ensure that your sitemap remains effective in guiding search engines through your website’s content.

By following these best practices, you can create an effective XML sitemap that helps search engines efficiently crawl, index, and rank your website, ultimately improving its visibility and performance in search results.

The Impact of XML Sitemaps on SEO

XML sitemaps play a crucial role in search engine optimization (SEO) by helping search engines discover, crawl, and index your website’s content more efficiently. In this section, we’ll discuss the various ways XML sitemaps impact SEO and contribute to your website’s overall online visibility.

Improved crawl efficiency

Search engines use web crawlers, also known as bots or spiders, to discover and index web pages. An XML sitemap provides a list of all your website’s important pages, making it easier for search engine crawlers to find and access them. This improved crawl efficiency leads to faster indexing and better visibility in search results.

Enhanced content discovery

Without an XML sitemap, search engines may struggle to discover and index all your website’s pages, particularly if your site has a complex structure or lacks strong internal linking. By submitting an XML sitemap, you ensure that search engines have access to a complete list of your website’s content, increasing the likelihood that all your pages will be indexed.

Prioritization of important pages

The XML sitemap allows you to specify the priority of each page on your website relative to other pages. By assigning higher priority values to your most important pages, such as your homepage, key product pages, or high-quality content, you help search engines understand which content is most valuable and should be crawled and indexed first.

Faster indexing of new and updated content

When you add new content or update existing pages on your website, it’s essential to notify search engines promptly. An up-to-date XML sitemap ensures that search engines are aware of your latest content and can index it more quickly. The <lastmod> element in the sitemap can further assist search engines in identifying recently modified content, ensuring that your freshest content gets indexed in a timely manner.

Identification and resolution of crawling issues

By monitoring your XML sitemap’s performance in tools like Google Search Console or Bing Webmaster Tools, you can identify and address any crawling issues that may prevent search engines from accessing or indexing your content. Resolving these issues helps improve your website’s visibility in search results and ensures that users can find your content.

Better indexing of media content

XML sitemaps can also include additional elements for images and videos, providing search engines with more information about the media content on your pages. This enhanced understanding helps search engines index your images and videos more effectively, leading to better visibility in image and video search results.

In summary, XML sitemaps play a vital role in SEO by facilitating efficient crawling and indexing of your website’s content, prioritizing important pages, and helping you monitor and resolve crawling issues. By creating, optimizing, and maintaining an XML sitemap, you can significantly improve your website’s visibility and performance in search engine results.

News

## Update  2012/07/23:   Bing changed their sitemap guidelines in June 2012, since then we added Bing to our list of crawlers. We have also added some more changes in the script that supports non-English characters within the URL structure and alphabetic characters within the title tag as well.

## Update  2012/01/11:   Three years later Google increased the XML sitemap limit from a maximum of 50,000 URLs to 100,000 (thanks to Zach Thacker for pointing it out). The reason they gave was that “having one sitemap with 50–100k URLs has always been the recommended best practice.”

Google increased the XML Sitemap file size limit from 10MB to 50 MB. This is because within XML sitemap instance is sometimes the URL are longer for example image URLs, PDF URLs, alternate language URLs and More.

## Update  2007/09/24:   Bing increased the XML sitemap limit from 50000 to 250000 URLs (Thanks to Tom at Bing for sharing the information).

## Update  2007/09/17:   Google has increased the XML sitemap limit from 50000 to 100000 URLs and they are telling us that this is the maximum number of URLs per XML file.