Free ToolLarge-Site SEOClient-Side

Sitemap Builder & Splitter

Generate valid, chunked sitemap.xml files and a sitemap_index.xml—all in your browser. Enforce the 50k URL and 50 MB limits, optionally GZIP each part, and download a single ZIP.

Split by 50k URLs and 50 MB caps
ZIP with index & all parts
No upload — runs locally
URLs Input
URL Governance
Defaults (optional)
Row-level values from CSV override these defaults.
Splitting & Limits
Hard-capped at 50,000 per spec
We also enforce a 50 MB maximum per part.
Index Location (optional)
If blank, the index will reference filenames only.
Build
Debug & Tests (local)

Who is this for?

Fast-Changing Sites

Ecommerce, marketplaces, news, UGC—where thousands of URLs shift weekly.

Migrations & Replatforming

Emit clean sitemaps to speed re-indexing and validate coverage.

Headless & Agencies

When plugins are not enough and you need strict control.

How it works

  1. Paste URLs or upload CSV (url,lastmod,changefreq,priority).
  2. Choose governance (force HTTPS, trailing slash mode, de-dupe) and defaults.
  3. Split with caps: ≤50,000 URLs & ≤50 MB per file. Optional .xml.gz.
  4. Download a ZIP with sitemap_index.xml and all parts.
Tip: Host the ZIP contents at /sitemaps/ (or any folder) and submit the index to Search Console.
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