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Free ToolLarge-site SEOClient-side
Sitemap Builder & Splitter
Generate valid, chunked sitemap files and a sitemap index in your browser.
50k URL cap support50 MB checksZIP download
Split safely for large sites
Ship updates faster
Keep indexing cleaner
Add URLs
URL Governance
Defaults
CSV row values override these defaults.
Splitting & Limits
Hard-capped at 50,000 URLs and 50 MB per part.
Index Base URL
Leave blank to reference filenames only.
Build
Debug & Tests
Who is this for?
Fast-changing sites
Great for ecommerce, marketplaces, news, and large content inventories.
Migrations
Useful when replatforming or reindexing a large set of URLs.
Headless teams
Helpful when you need more control than a plugin gives you.
How it works
- Paste URLs or upload a CSV.
- Choose governance rules and defaults.
- Split into compliant sitemap parts, with optional gzip.
- Download a ZIP with the index and all parts.
Tip: host the ZIP contents in a sitemaps folder and submit the index in Search Console.
Continue in Postly
Use Postly to publish new pages, coordinate updates, and keep your workflow in one place.
From tracked links to campaign reporting
Use cleaner UTMs inside a more complete campaign workflow
Build the link here, then use Postly to publish it across channels and compare which campaigns and formats actually drive clicks.
Standardize campaign naming across channels
Track click performance from scheduled posts
Connect traffic insights to broader content reporting