# HostedSiteDemo > Free website and hosting tools: bandwidth, uptime, page load time and website cost calculators, plus meta tag, robots.txt, redirect and XML sitemap generators. Free calculators and generators for anyone launching or running a website: size your hosting, estimate costs and load times, and create the meta tags, robots.txt, redirects and sitemap every site needs. All tools are free, need no account, and run entirely in the browser; nothing a visitor enters is uploaded. Each tool page states the formula or standard it uses, with worked examples. Built by Sumair Roudani (https://sumairroudani.com). Published by Avancera Solution. Contact: hello@hostedsitedemo.com. ## Hosting & performance - [Website Bandwidth Calculator](https://hostedsitedemo.com/bandwidth-calculator/): How much monthly bandwidth your site needs from page size and traffic. - [Page Load Time Calculator](https://hostedsitedemo.com/page-load-time-calculator/): Estimate how long a page takes to load on mobile, 4G and broadband. - [Uptime & SLA Calculator](https://hostedsitedemo.com/uptime-calculator/): What 99.9% or 99.99% uptime means in minutes of downtime. - [Website Cost Calculator](https://hostedsitedemo.com/website-cost-calculator/): The first-year and yearly running cost of a website, item by item. ## SEO files & tags - [Meta Tag Generator](https://hostedsitedemo.com/meta-tag-generator/): Title, description and Open Graph tags, with a Google and social preview. - [Robots.txt Generator](https://hostedsitedemo.com/robots-txt-generator/): Build a robots.txt with blocked paths, your sitemap and AI crawler rules. - [301 Redirect Generator](https://hostedsitedemo.com/redirect-generator/): Redirect rules for .htaccess, Nginx and _redirects, plus HTTPS and www. - [XML Sitemap Generator](https://hostedsitedemo.com/sitemap-generator/): Turn a list of URLs into a valid sitemap.xml file. ## Guides - [How Much Bandwidth Does a Website Need?](https://hostedsitedemo.com/guides/how-much-bandwidth/): Bandwidth vs data transfer, real numbers by site type, and when a CDN helps. - [99.9% vs 99.99% Uptime: What SLAs Really Mean](https://hostedsitedemo.com/guides/uptime-sla-explained/): The nines, what hosting SLAs pay out and how to measure your own uptime. - [Robots.txt: A Practical Guide](https://hostedsitedemo.com/guides/robots-txt-guide/): What it can and cannot do, the syntax, and the mistakes that deindex sites. - [301 vs 302 Redirects: Which to Use](https://hostedsitedemo.com/guides/301-vs-302-redirects/): Permanent vs temporary, SEO effects, chains and moving a whole site. ## Optional - [About](https://hostedsitedemo.com/about/): who builds the site and how the tools are checked - [Sitemap](https://hostedsitedemo.com/sitemap-index.xml)