XML Sitemap Generator

Only include canonical, indexable URLs that return a 200 status; listing pages that redirect, 404, or carry a noindex tag sends mixed signals and wastes crawl budget. A single sitemap file is capped at 50,000 URLs or 50MB uncompressed, so larger sites need a sitemap index file that links out to multiple child sitemaps.

Setting an accurate lastmod date, tied to when the content actually changed rather than a build timestamp that updates on every deploy, helps crawlers prioritize re-fetching pages that genuinely need it. If every URL shows the same lastmod because it's generated at build time regardless of content changes, crawlers learn to distrust the field and it stops influencing crawl priority.

Google has said for years that it largely disregards changefreq and priority values, treating them as unreliable since site owners tend to mark everything as daily and priority 1.0. It's fine to include them for compatibility with other search engines and tools, but don't spend time tuning them expecting a ranking effect; put that effort into accurate lastmod values instead.

Once generated, submit the sitemap URL through Google Search Console and Bing Webmaster Tools rather than only referencing it in robots.txt, since Search Console gives you direct feedback on how many submitted URLs were actually indexed versus excluded, which is the fastest way to catch a systemic issue like an accidentally included noindex template.

A sitemap generated once at launch and never regenerated becomes a liability rather than a help, since it starts listing removed pages and omitting new ones, which can actively mislead crawlers about what currently exists on the site. Regenerating it as part of your build or publish pipeline, rather than as an occasional manual task, keeps it accurate without relying on anyone remembering to update it.

Beyond the standard URL sitemap, Google supports dedicated sitemap extensions for image and video content that carry extra metadata like captions, titles, and duration, which can help those assets surface in image search or video results even when the surrounding page ranks modestly for its main query. Sites with a large media library often see more incremental value from adding an image sitemap than from further polishing the primary one.