# Free Sitemap Index Generator

> Paste child sitemap URLs to generate a valid sitemapindex document with optional lastmod - ideal for large sites with multiple sitemap files.

```yaml
url: "https://www.scrolllaunch.com/tools/sitemap-index-generator"
slug: sitemap-index-generator
category: onpage
keywords: "sitemap index generator, sitemapindex generator, create sitemap index, sitemap index xml, free sitemap index generator"
```

## How to use

1. **List child sitemap URLs** - Absolute https URLs to each urlset file.
2. **Optional lastmod** - Apply one lastmod to every entry if you track index freshness that way.
3. **Deploy the index** - Host sitemap_index.xml and add it to robots.txt.

## When you need a sitemap index

Use an index when you have multiple urlset files - by locale, section, or to stay under per-file limits.

Reference only the index from robots.txt so crawlers discover children in one hop.

Validate the index and children with the sitemap checker after deploy.

## What you get

- Child URL list → index XML
- Optional shared lastmod
- Copy / download
- Browser-only

## Related tools

- **[XML Sitemap Generator](https://www.scrolllaunch.com/tools/sitemap-generator)** - Generate a urlset XML sitemap from a pasted URL list - optional changefreq, priority, and lastmod.
- **[Sitemap Split / Merge](https://www.scrolllaunch.com/tools/sitemap-split-merge)** - Split large URL lists into chunked sitemaps or merge multiple lists - emits an index when needed.
- **[Robots.txt Generator](https://www.scrolllaunch.com/tools/robots-txt-generator)** - Build a clean robots.txt with sitemap URL, disallow paths, and optional AI-scraper blocks.
- **[Sitemap Finder & Checker](https://www.scrolllaunch.com/tools/sitemap-checker)** - Find and validate sitemaps on any website - robots.txt discovery, validity, and URL totals.

## Related

- [All tools](https://www.scrolllaunch.com/tools)
- [Pricing](https://www.scrolllaunch.com/pricing) - launch free; dofollow while the badge stays on your site.
- [Directories](https://www.scrolllaunch.com/directories) - curated startup directories ranked by DR.