Browser Tools for started as a website to host a single thing: our Host Lookup Tool. But over the years, we've create a number of other tools that are useful to webmasters and website owners. We've cataloged them here.

Host Lookup Tool

This is the tool that started it all. Just enter a website you are interested in and this tool will tell you who is hosting it. There are lots of reasons you might want this. Maybe you are impressed with the speed and reliability of a site you use and you would like to use its hosting company. Or maybe you are interested in who is really hosting your own site. It isn't uncommon to find that you are not being hosted by the company you think you are. There are many other uses for this tool. Give it a try:

User Agent Tool

Your user agent is, put most simply, the software that you are using to access the web. It documents the operating system and browser you are using. Our User Agent Tool tells you this and much more: your IP address, whether you have JavaScript and cookies enabled, your local time and time zone, and your display and browser sizes. There are lots of uses for this information, as the article that goes along with this tool explains. Check it out:

DMCA Notice Generator

The internet makes it very easy for people to steal your content. Usually, getting people to take down your copyrighted work is as easy as asking the offender. But in some cases, more extreme measures are required. That's where the Digital Millennium Copyright Act (DMCA) comes in. When someone refuses to take down your work that they are using illegally, you can send out a DMCA take-down notice to their host, which is required by law to quickly take the content down. (If you need to find out their host, use our Host Lookup Tool.) Our DMCA Notice Generator makes it easy to create a notice. Just fill in the basic information about who you are and what the offending material is, and our generator does the rest. Give it a try:

Domain Lookup Plugin for Firefox

Ever read a phrase online and think, "That would make a great domain name!"? Domain Lookup is a Firefox extension that helps you discover valuable domain names while surfing the web. Just select the text you wish to check and hit the shortcut key. Domain Lookup checks availability at your favorite registrar in a heartbeat. The latest version integrates with WhoIsHostingThis. If you enter a domain which generates a "server not found" error in your browser, you'll see options to:

  • Register domain
  • WHOIS lookup
  • Make an offer on this domain via Sedo
  • Discover who hosts the domain via WhoIsHostingThis

Learn more at And then install it:


We hope you find these tools useful. is always looking for ways to make running a website easier, so check back often to see what tools and other resources we've created.