I try a lot of website blocker extension for chrome, but these extension not working in incognito mode. How can I block a website completely in Google chrome?
Thank you for the answers.
The whole idea of Incognito mode is to stop anything tracking your behaviour, so all extensions are disabled by design.
The solution depends on what it is you want to block. If it is such things as adult sites or social networking you may be better off switching your DNS server settings to those provided by OpenDNS, who enable you to block various categories of sites. These settings will still be applied in Incognito mode.
If it's just one or two sites and only on a handful of computers, you could instead edit the hosts file - take a look at this question for more details.
A user can easily access inappropriate content by entering incognito or inprivate modes, searching for anything they want using google, yahoo, or bing, and seeing anything they want by clicking on the image tab. All the major search engines cache the image content on their servers. This incognito->search->images ultimately bypasses most parental control software and parental control routers. I've found three routers that conveniently enforce safe search at the router (I'm not affiliated with any of these in anyway. I'm just a concerned parent doing their homework.):
www.kibosh.net (enforce safe search + service)
http://www.blocksi.net/parental-control.php (enforce safe search + service or openDNS)
https://www.pcwrt.com/ (enforce safe search + openDNS)