Free Tools For People Who Build Websites — Since 1999

Free Tool

Find out where in the world any IP address is located.

Use this poll widget to ask your visitors a question.

Test the speed of your website with this load time checker.

Scan your website to find broken links to webpages that don't exist.

Let visitors read and leave messages in your guestbook.

Stop scrapers from gathering your e-mail address for spam.

Show off how many times your webpage has been seen.

Calculate the CIDR representation of an IP address range.

Calculate IP address range from a CIDR.

Find out your browser's user agent string and what it means.

Enter any domain or hostname and find out the corresponding IP.

Find the Autonomous System number and name associated with an IP.

Find out what headers are returned from any website's server.

Get dozens of free reports about your website traffic.

Improvely tracks your ad performance while monitoring for click fraud.