- Class
- C1 Mechanism
- Weight
- 8
- Severity on fail
- critical
- Applies to
- Google and Bing
Test this rule on a live site with the XML sitemap checker. Free, no account needed.
Scope and evidence
Evaluated on each sitemap file. The book marks this requirement REQUIRED, STANDARD.
{entry_kind} is "URLs" for a sitemap and "sitemaps" for an index.
Fail conditions
Each condition has a stable code and a reason template. The evaluator fills the placeholders from observed values only; no sentence in a report is generated.
too_many_urlsThe sitemap {sitemap} has {count} {entry_kind} and is {bytes} bytes uncompressed. The Sitemaps protocol limits each file to 50,000 entries and 50MB (52,428,800 bytes), and Google applies the same limits.
too_largeThe sitemap {sitemap} has {count} {entry_kind} and is {bytes} bytes uncompressed. The Sitemaps protocol limits each file to 50,000 entries and 50MB (52,428,800 bytes), and Google applies the same limits.
index_too_manyThe sitemap {sitemap} has {count} {entry_kind} and is {bytes} bytes uncompressed. The Sitemaps protocol limits each file to 50,000 entries and 50MB (52,428,800 bytes), and Google applies the same limits.
index_too_largeThe sitemap {sitemap} has {count} {entry_kind} and is {bytes} bytes uncompressed. The Sitemaps protocol limits each file to 50,000 entries and 50MB (52,428,800 bytes), and Google applies the same limits.
The documented fix
Split into several files and list them in a sitemap index.
Sources, quoted
These are the passages the rule rests on, stored once in the knowledge base and emitted exactly as written. A citation marked for specific conditions appears only on findings with those codes.
“each Sitemap file that you provide must have no more than 50,000 URLs and must be no larger than 50MB (52,428,800 bytes).”
[SITEMAPS-ORG] Sitemaps XML format (protocol) · Using Sitemap index files · last updated 2016-11-21
https://www.sitemaps.org/protocol.html“Sitemap index files may not list more than 50,000 Sitemaps and must be no larger than 50MB (52,428,800 bytes)”
[SITEMAPS-ORG] Sitemaps XML format (protocol) · Using Sitemap index files · last updated 2016-11-21
https://www.sitemaps.org/protocol.html“All formats limit a single sitemap to 50MB (uncompressed) or 50,000 URLs.”
[G-SITEMAP-BUILD] Build and submit a sitemap · Sitemap best practices · last updated 2026-07-08
https://developers.google.com/search/docs/crawling-indexing/sitemaps/build-sitemap