"... quickly get an indication of how their responsive site will look on the most popular devices."
online | Tama Pugsley and Andy Hovey | visit site ↗
- Am I responsive
"A time saving exercise by @justinavery for RWD Weekly Newsletter"
online | Justin Avery | visit site ↗
- W3C Markup Validation Service
"Check the markup (HTML, XHTML, …) of Web documents"
online | open source (via W3C) | visit site ↗
Tool for testing websites - giving insights into key areas, including accessibility, SEO, social media and technology.
online | Silktide | visit site ↗
- Richard's Toolbox
collection of online tools
online | Richard Oosterhof | visit site ↗
"… gives you insight on how well your site loads and provides actionable recommendations on how to optimize it."
online | GT.net | visit site ↗
- web page test
"... test from multiple locations around the globe using real browsers and at real consumer connection speeds."
online | open source (via Google) | visit site ↗
- Site 24x7
"Free Network and Site Reliability Engineer Tools"
online | Zoho Corp. | visit site ↗
- MX Toolbox
"...free, fast and accurate network diagnostic and lookup tools."
online | MXToolBox, Inc. | visit site ↗
- PageSpeed Insights
"...analyzes the content of a web page, then generates suggestions to make that page faster."
online | Google | visit site ↗