What is Sitemap Size Limit?

The maximum file size for a single sitemap is 50MB (52,428,800 bytes) when uncompressed. This limit exists alongside the 50,000 URL limit — whichever is reached first applies.

In practice, the size limit is rarely the constraint because most sitemaps with 50,000 URLs are well under 50MB. However, sitemaps with very long URLs or extensive metadata (like hreflang annotations for many languages) may hit the size limit first.

Using gzip compression can help with bandwidth but doesn't change the uncompressed size limit — the file must still be under 50MB after decompression.