What Is a Sitemap and How Do You Create One for Your Website?
A sitemap is a file that lists the pages of your website so search engines can discover and crawl them more reliably. You need one most when your site is large, new, or poorly linked internally, because crawlers may otherwise miss pages or recrawl unchanged ones unnecessarily. You can create one with a free online generator such as XML Sitemaps Generator, which produces a search-engine-ready XML file without registration, and then submit it to Google, Bing, and other engines.
What a sitemap actually does
A sitemap acts as a map of your site's URLs. Search engines use it to find pages they might not reach by following links alone, and to understand when each page last changed. That second part matters: if a sitemap reports a last-modification date, crawlers can skip pages that haven't changed since their last visit instead of recrawling everything.
XML Sitemaps Generator sets two fields automatically:
- Last modification date — based on your server's response, so crawlers avoid recrawling unchanged documents.
- Priority — a value from 0.0 (lowest) to 1.0 (highest), calculated relative to other pages on the same site. The generator decreases priority as page depth increases, meaning pages further from the homepage get lower priority.
Priority is a hint about relative importance within your own site, not a ranking factor against other sites.
XML vs. HTML sitemaps: which to use
These serve different audiences, and many sites benefit from both.
| XML sitemap | HTML sitemap | |
|---|---|---|
| Audience | Search engine crawlers | Human visitors |
| Purpose | Help engines discover and index URLs | Help visitors navigate your site |
| Format | Structured XML file | A visible page of links |
| Typical use | Submit to Google, Bing, and others | Linked in your footer or menu |
XML Sitemaps Generator produces both: the XML file for engines and an HTML site map for visitor navigation.
What a sitemap can include
Beyond plain URLs, sitemaps can carry additional content types and metadata:
- URLs with last-modification dates and priority values
- Image sitemaps
- Video sitemaps
- News sitemaps
If your site relies on images, video, or news content, these specialized entries give engines more context than a bare URL list.
Generating a sitemap with a free online tool
The general workflow with a generator like XML Sitemaps Generator:
- Enter your site's URL into the generator.
- Let it crawl your site. The tool follows your internal links to build the URL list and reads your server's responses to fill in modification dates and priority.
- Download the XML file (and the HTML site map if you want one).
- Upload the file to your site's root directory, typically as
sitemap.xml. - Submit it to Google, Bing, and other search engines through their webmaster tools.
The free tier covers up to 500 URLs and multiple websites. Paid plans add automatic sitemap updates, cloud hosting of the sitemap, support for sites of any size, image/video/news sitemaps, and SEO health reports.
Common sitemap problems to watch for
- Broken links. A generator that checks your links will flag them; broken URLs in a sitemap waste crawl budget and can trigger errors in search console reports.
- Size limits. Very large sites exceed what a single sitemap file can hold and need to be split into multiple files with an index. This is where a paid tier or a dedicated tool becomes necessary.
- Errors reported by search engines. If Google reports errors on your sitemap, check the format and the URLs it points to. One user quoted on the site described switching from a ROR sitemap that Google flagged with errors to this generator's XML output, which Google accepted within minutes.
- Stale sitemaps. A sitemap that isn't regenerated as your site changes will list outdated URLs and miss new ones. Automatic updates address this.
Deciding what you need
If your site is small and mostly static, the free generator plus a manual resubmission when content changes is usually enough. If you publish frequently, host many pages, or depend on images, video, or news content, the automatic updates and larger limits in a paid plan remove the recurring manual step. Either way, the goal is the same: give crawlers an accurate, current list of your pages so they index what matters.