They, who work with website layout constantly know that clients have become more and more demanding lately. Along with the increase in layout requirements, new services appear., which allow this layout to be simplified.

I want to introduce 2 X-Precise and Perfect pixel services

Both services deserve attention and work about the same..

• site permissions Perfect pixel для Google Chrome
• site permissions Perfect pixel дляFirefox
• X-Precise for any browser

About Perfect pixel I can say that its plus is that it works through the browser, so you don't need to embed it directly into the site. This add-on has a huge disadvantage., since it only works in browsers google chrome and firefox.

If the client is really demanding, then you better buy and download X-Precise from ThemeForest, though he is paid but I think 4 a dollar is a small price to pay for such a great plugin, pay off again. I think this money is rather thanks to the developers. I highly recommend watching it. But if your clients are not as demanding on browsers like Safari, Opera, ., Internet Explorer, then it will be enough for you Perfect pixel.

X-Precise may be especially useful for you when developing responsive websites, most of these sites are made specifically for Safari.