Large Sitemap XML Splitter
Split a list of site links into separate valid XML files and compile a master index map.
URL Directory
Compiled XML Files
Managing Large Sitemaps: Splitters, Indices, and Crawl Efficiencies
An XML sitemap is a blueprint of your website that leads search engines to your critical content. However, sitemaps are subject to strict technical limits enforced by Google and Bing. A single sitemap file cannot contain more than **50,000 URLs** or exceed **50 MB** in uncompressed file size.
For large portals, forums, and e-commerce websites with hundreds of thousands of landing pages, these limits are easily exceeded. To maintain crawl efficiency and prevent crawler errors, webmasters utilize a **Large Sitemap XML Splitter** to partition link directories into separate XML sub-files and compile a master `sitemap-index.xml` file pointing to all of them.
1. Limits and Standards
Exceeding sitemap limits will cause Google Search Console to reject the file:
- Sitemap Index: A master sitemap file that lists and links to individual sub-sitemaps (e.g. `sitemap-index.xml`).
- Size Partitioning: Large websites split files at 30,000 or 40,000 URLs to leave safety margins for file size increases.
- Canonical URLs: Sitemaps should only include canonical `200 OK` URLs. Avoid listing redirect targets (`301`) or non-indexable pages (`noindex`).
2. Index File Syntax
A sitemap index file uses a slightly different XML schema:
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<sitemap>
<loc>https://example.com/sitemap-1.xml</loc>
<lastmod>2026-07-08T05:00:00Z</lastmod>
</sitemap>
</sitemapindex>Search bots read the index file, discover the URLs of the sub-sitemaps, and then parse each sub-sitemap in parallel to discover page URLs.
3. FAQ Section
Q: How many sub-sitemaps can a sitemap index file reference?
A single `sitemap-index.xml` file can reference up to 50,000 individual sitemaps. That means a single index file can map up to **2.5 billion page URLs**!
Q: Should I submit the index file or the sub-sitemaps to Google?
Submit the master `sitemap-index.xml` file. Google Search Console will automatically detect, crawl, and monitor all referenced sub-sitemaps.
Q: Why is Googlebot not crawling all URLs in my sitemaps?
Adding URLs to a sitemap does not guarantee indexing. Sitemaps are crawl suggestions; Google makes indexing decisions based on content quality, domain trust, and crawl budget.