How many URLs can one sitemap file hold?

Up to 50,000 URLs or 50MB uncompressed, whichever limit you hit first. These are the protocol limits published by sitemaps.org, not a Kalenux rule. The audit flags a sitemap that crosses either threshold, since a browser or crawler may simply refuse to process the rest of the file once it does.

Do I need a sitemap index file?

Only once a single sitemap would exceed 50,000 URLs or 50MB. Below that, one sitemap.xml is simpler and there's nothing to gain from splitting it. Above it, a sitemap index file lists multiple child sitemaps, commonly split by section or content type, and you submit the index rather than each child individually.

Should noindexed pages be in the sitemap?

No. A noindex page listed in the sitemap sends a contradictory signal: the sitemap says index this, the page's own meta tag says don't. The audit flags this directly as noindex_in_sitemap. Remove the page from the sitemap the moment you noindex it, or better, generate the sitemap from the same indexable flag that drives the noindex tag so the two can never drift apart.

How often should my sitemap update?

Whenever your indexable URL set changes: a page is published, removed, or changes canonical or noindex status. Most CMS and static site generators regenerate the sitemap automatically on build or publish, which is what you want. A sitemap on a fixed schedule that ignores content changes will drift out of sync exactly when the site is changing the most.

Does submitting a sitemap in Search Console guarantee indexing?

No. A sitemap is a discovery aid and a hint about which URLs you consider canonical, not a command. Google still decides independently whether to crawl and index each URL based on its own quality and crawl-budget signals. Submitting the sitemap makes sure Google knows the URL exists and is quicker to find it; it does not override indexing decisions.

Why would an indexable page be missing from my sitemap?

Usually because the sitemap is generated from a different source of truth than the page's own canonical and indexable flags, so a page published through one path never reaches the sitemap generator. It also happens when a page's canonical points elsewhere on purpose (pagination, filtered views) and correctly stays out, which is not a defect. The audit's indexable_not_in_sitemap check only fires when the missing page is its own canonical, to avoid flagging intentional exclusions.

Home/SEO Guide/Sitemaps

SEO guide · category 05 · discovery

XML sitemapsDoes your sitemap list only pages you want indexed?

A sitemap is your list of URLs worth indexing. Search engines use it to discover pages and schedule crawls, so every stale, redirected or noindex entry weakens the signal.

Last reviewed · 1 Oct 2026Reference article · 14 sources →Kalenux engineering

Check my sitemap free →Sitemap Validator

/sitemap.xml · 5 of 12,480 URLs3 entries shouldn’t be here

✓/products/sneakers/200 · canonical · indexable✓ keep

✕/products/old-sku/301 → /products/new-sku/✕ redirect

✕/search?q=shoesnoindex✕ noindex

✕/blog/2023-recap404✕ gone

✓/blog/guide/200 · lastmod 2026-09-28✓ keep

only canonical, indexable 200s belong · illustrative

what’s inside the file

Read a sitemap line by line.

The format is small. What matters is which lines Google actually uses.

1<?xml version="1.0" encoding="UTF-8"?>UTF-8 required

2<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">protocol namespace

3 <url>one block per page

4 <loc>https://shop.com/trail/</loc>read · absolute canonical URL

5 <lastmod>2026-09-28</lastmod>read · only if it’s accurate

6 <changefreq>daily</changefreq>ignored by Google

7 <priority>0.8</priority>ignored by Google

8 </url>

9</urlset>max 50,000 URLs · 50 MB

does your site need one

It depends on size and how well pages are linked.

A sitemap matters most when crawlers can’t reach everything through links on their own.

STRONG INTERNAL LINKSWEAK INTERNAL LINKSSMALL

OPTIONALSmall, well linkedCrawlers find everything anyway. A sitemap is still cheap insurance.

RECOMMENDEDSmall, loosely linkedPages outside the menu get found faster when they’re listed.

LARGE OR NEW

HELPFULLarge, well linkedHelps crawlers prioritise new and changed pages.

ESSENTIALLarge or new, loosely linkedThe sitemap may be the main way many pages are discovered.

sitemap vs reality

Compare three numbers to find what’s wrong.

The gaps between what you list, what can be indexed and what Google indexed each point to a different fix.

Listed in sitemap12,480

Indexable, 200, canonical11,020Gap 1 · 1,460 entries redirect, 404 or are noindex → remove them from the sitemap

Indexed by Google9,310Gap 2 · 1,710 valid pages not indexed → check the reasons in Search Console

illustrative

splitting a large sitemap

One index, many files under the limit.

Past 50,000 URLs, split by type and list each file in a sitemap index. Splitting by type also shows which section has problems.

sitemap_index.xml · 5 files

products-1.xml50,000 · full

products-2.xml31,240 / 50k

categories.xml1,820 / 50k

blog.xml4,310 / 50k

pages.xml96 / 50k

illustrative

sitemap questions, answered

The sitemap myths, settled.

Q1Does every site need a sitemap?

Not always. Google says small, well-linked sites may not need one. Sitemaps help most on large or new sites, sites with few external links, and sites with lots of media or news content.

Q2Do priority and changefreq help?

Not for Google. It ignores both values. It uses lastmod, but only when it is consistently accurate.

Q3Should noindex pages be in the sitemap?

No. A sitemap is a list of URLs you want indexed. Including noindex, redirected or non-canonical URLs sends mixed signals.

Reference article · 14 sources

The protocol, its limits and what Google actually reads.

An XML sitemap is a file that lists the URLs on a website that the owner wants search engines to crawl, with optional details such as when each page last changed. The format is defined by the open Sitemaps protocol at sitemaps.org and is supported by Google, Bing and other search engines. A sitemap is a hint: it helps discovery but does not guarantee that listed pages will be crawled or indexed.

KALENUX REFERENCEXML sitemaps