We are creating a website and its shopping site. But it contains more than 5k urls and but using online sitemap generator I unable to create a sitemap which contains more than 4k urls. Plz suggest me any solution for this.

I know people who have created sitemaps with 5 million URLs using A1 Sitemap Generator - see testimonials.

But not sure why you ask in the A1 Sitemap Generator support forum when you are apparently not using it?