If you're looking to Download SiteMap Generator on your Chromebook laptop Then read the following guideline.

Easily create a sitemap for your website : - write you website address - press [crawl] and wait ... Main features: - modulable crawling speed; if you get 5xx errors, reduce speed (don't worry, pages with 5xx errors are retried later up to 3 times) - crawling can be paused and app safely closed, and then restarted from the point where it had been interrupted only urls beginning with initial provided url are crawled (if a link points to another subdomain or protocol or to a parent page, is not followed) there's a free limited version available , if you have question, please try the lite version