extension ExtPose


CRX id


Description from extension meta

Display the server IP address, with a realtime summary of IPv4, IPv6, and HTTPS information across all page elements.

Image from store IPvFoo
Description from store IPvFoo uses the webRequest API to extract protocol-related information as a webpage downloads, and summarizes it into a convenient table. Everything is captured and displayed privately, without creating any additional network traffic. The first thing you'll see is an icon in the location bar. A large 4 or 6 shows whether the outer page was fetched using IPv4 or IPv6. If the page contains elements from other domains, then smaller numbers will appear alongside for those. When you click the icon, a table pops up, containing a row of information for each domain: - A padlock icon, for HTTP, HTTPS, or a mix of both. This is helpful for tracking down mixed content warnings, but you shouldn't treat it as absolute security advice. - The IPv4 or IPv6 address. If connections span more than one IP, then the most recent one wins. When the connection is still open, the address is highlighted in yellow. - A "cached" symbol. This mainly exists to warn you that no actual connections took place, so the IP address might be stale. - An "S" for WebSocket handshakes in Chrome 58+. For convenient copying, clicking on a hostname or address will select it. There's also a right-click option to look up IP addresses with bgp.he.net. I'm not affiliated with that service, but it's my personal favorite. IPvFoo is Free Software (Apache 2.0 license).

Latest reviews

  • (2022-01-17) Yifan Zhu (Makazeu): 很好用
  • (2020-07-15) Germán Galera: I love this ext but there is a unexpecting behaviour happened, when i accesed to a web Ipvfoo gives me more results in one OS (xp old chrome) than in Win7 (new chrome). In XP when I go to larazon_es show me 39 results but same web in win7 shows just 31 and in win7 virtualmachine even a lot less. Why that happend??
  • (2020-01-08) Ryan Brady: I love this browser extension however the only issue I see is that recently it has stopped working on Chrome Dev on MacOS Catalina -- every website shows the generic white "IPvFoo" icon instead of the "6" or "4". Extension works great with Chrome Dev on windows 10 so i'm not sure what has changed.
  • (2019-12-21) JW Smythe: This is an amazingly useful extension for those of us trying to get up on IPv6. I brought up a HE.net tunnel for this LAN, and got IPs assigned to all the local devices. I didn't see a really good way to see which sites are IPv6, and the extent of their use. I'm impressed seeing how many organizations are up now. Not too long ago, it was rare at best. My ISP still doesn't support IPv6, but the HE tunnel lets me. The connection chart is nice, so I can see the extent of the site's implementation.
  • (2019-11-27) Renan Menezes: Ferramenta vem se transformando em indispensável para quem trabalham com infraestrutura de TICs.
  • (2019-02-11) 蒼氓: hao
  • (2019-02-07) Easy way to view all the domains used by a whitelisted website so you can add those domains to the whitelist too so the website will work correctly on a parent-filtered system.
  • (2018-09-26) 韩朝伟: 很好用
  • (2018-09-09) Georgi Stoyanov: It's an awesome extension. There is however an issue with the new Chrome 69 where after a while the icon reverts back to the default IPvFoo image instead of showing 4 or 6 and you need to reload the website to get it to show properly.
  • (2018-08-29) Md.Imran Hossain: good
  • (2018-08-11) Shaikh Nayeem: Veri nice for checking live websites ip address.
  • (2018-07-30) irul dimy: nice
  • (2018-03-25) Alexandre Silva Nano: Very useful tool! Just what I need!
  • (2017-11-29) Wendell Soares: Amazing tool! It is very useful.
  • (2017-09-12) Ya Huang: 非常有用的扩展,实时查看当前网页连接的网站,使用的IP
  • (2017-07-06) 黄俊: 这个看到的ip才是真的,有些用dns查的不是实际访问的ip,国内用户福利
  • (2016-12-02) Mark Young: I'm not a developer, just someone interested in seeing IPv6 penetration. IPvFoo is great for seeing not just the main page but the components are or are not using IPv6. (Bad news: as of this writing, almost every site I use is either IPv4-only or has an IPv4-only component, and that's even after filtering out most advertisements via AdBlock Plus.)
  • (2016-11-11) curt: Good.
  • (2016-11-11) Davide Lima Duarte Daum: One of the few extension that report the ip of the site during the connection and not a resolution made by someone else.
  • (2016-10-09) Chip Marshall: As a network engineer, I find this very helpful for seeing what IP version various sites are using.
  • (2016-07-16) Nice and useful extension to know the IPv6 status.
  • (2016-07-11) unb Wu: 非常好用!!!
  • (2016-06-29) John from tennessee: Very handy tool.
  • (2016-06-10) Philip P: Really cool way of seeing if the site is connecting via ipv6 or ipv4
  • (2016-03-08) Jose Robles (Lobo): Been using it for years and love the extension. Noticed that it recently does not appear to be working with Chrome. Has anything changed?
  • (2016-01-05) Inoyatullohon Junaydullayev: Very Coooool ))
  • (2015-12-06) achtung: полезное расширение и главное рабочее
  • (2015-10-25) Great Extension!
  • (2015-10-23) Adil Hidayat: Superb :)
  • (2015-10-20) Zhu Yuedong: 看ip很实用,也很简洁

Latest issues

  • (2019-04-20, v:1.43) C Gregory: IPv6 and domain move
    I run a whm/cpanel vps. A few months ago, when I got a ipv6 modem from my isp, I set up one domain for IPv6. It worked great and my browser was showing me all 6s for that domain. This past week I deployed a new server and cpmoved all accounts to the new server. Now all accounts are showing IPv6 in IPvFoo, yea! Except for the one account that was setup with IPv6 on the old server. I've checked the zone files, the connection and all is good and even from my laptop, it's all green. The problem is my working pc, it's not green, like it use to be, it's a big red 4. I've tried deleting and reinstalling IPvFoo but I'm still showing a 4, even though my server team says they're getting 6, and my own laptop is getting a 6. Any ideas?
  • (2018-10-09, v:1.43) ben k: Chrome shuts down when closing incognito window connected to Facebook
    Launch a Chrome incognito window and browse to Instagram or Facebook. Wait for the page to load then close the incognito window. Chrome will shut down abnormally. This is seen on a Asus C202 and Acer X720P chromebook
  • (2018-09-23, v:1.43) curt: The fonts are huge.
    Sure I can change font size by browser font setting, but then the browser ui font is too small. Please add in an option to change font size. Thanks.
  • (2018-07-09, v:1.42) Prudhvee Nalluri: Feature request, GeoIP flags
    I would like to request geoIP flags along with IP addresses
  • (2017-09-25, v:1.41) Jonas Rathert: Permissions
    It seems the extension ask for permission to "read and change all your data on the websites you visit". What exactly does this mean - what is it good/necessary for?
  • (2017-06-13, v:1.37) Hakan ATAÇ: Proxy
    When using any proxy it shows proxy ip instead of the site ip. I'm not sure but is there any workaround? Because as far as I know when using proxy, browser asks everything through proxy so it seems inevitable that ip addresses return is proxy address instead of real site address.
  • (2017-04-04, v:1.37) Chrome crashes
    When I click to see IP Address, Chrome is crashing and Mac restarting for some reason
  • (2016-06-05, v:1.35) Matthew Shapiro: "Access Denied"
    The extension just appears as a "?" symbol now. If I click on it to view the sites from which assets are loaded I get "Access Denied" in the column where IP addresses used to display.
  • (2016-03-20, v:1.32) Aleksandar Urošević: IP in Tooltip
    Thank you for best IP extension for Chrome! It's lightweight and super fast. Will be good to add site IP as icon tool-tip instead IPvFoo name of extension (when we hover over icon).
  • (2016-03-05, v:1.32) Josh Peters: Removal from the address bar
    I recently noticed that IPvFoo now displays its icon in the extension bar, instead of the address bar. Is this changeable, or does Chrome no longer support the old display method?


80,000 history
4.8 (169 votes)
Last update / version
2021-08-25 / 1.44
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