# Is a Let's Encrypt certificate cross-browser compatible? **URL:** \ **Category:** Help\ **Created:** [April 11, 2019, 1:21pm UTC](https://community.letsencrypt.org/t/is-a-lets-encrypt-certificate-cross-browser-compatible/90947 "2019-04-11T13:21:06Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![LordLiverpool](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/lordliverpool/32/29832_2.png) [@LordLiverpool](https://community.letsencrypt.org/u/LordLiverpool)\ **Post date:** [April 11, 2019, 1:21pm UTC](https://community.letsencrypt.org/t/is-a-lets-encrypt-certificate-cross-browser-compatible/90947/1 "2019-04-11T13:21:06Z")
Hello Let's Encrypt, A client of mine has a website. It resides on a VPS running cPanel. His site is currently HTTP:// and I wanted to install an HTTPS:// certificate. But my client can only access his cPanel account. So I asked the WebHost provider to install an SSL cert and they wanted €90. Then I said what about installing a LetsEncrypt Certificate, As I know LetsEncrypt is integrated into WHM. And this was their response: > _No, LetsEncrypt is not currently available on shared hosting._ > _LetsEncrypt is not fully supported by all browsers - including some old browsers/versions of old browsers but also some recent versions of modern browsers. Our engineers are currently reviewing LetsEncrypt support for our shared hosting servers but I'm afraid they find it has not quite matured yet to roll it out. There would be no way for us to know how many visitors to a website got the 'connection not trusted' warning due to their specific browser version._ I was wondering how true/accurate their statement was? If Let's Encrypt is good enough for cPanel themselves then why isn't it good enough for the Hosting Provider? Anyone care to offer their opinion? Thanks in advance. ---
**Author:** ![JuergenAuer](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/juergenauer/32/26491_2.png) [@JuergenAuer](https://community.letsencrypt.org/u/JuergenAuer)\ **Post date:** [April 11, 2019, 1:46pm UTC](https://community.letsencrypt.org/t/is-a-lets-encrypt-certificate-cross-browser-compatible/90947/2 "2019-04-11T13:46:13Z")
Hi @LordLiverpool > [@LordLiverpool](#): > > LetsEncrypt is not fully supported by all browsers - including some old browsers/versions of old browsers but also some recent versions of modern browsers. yes, IE6 + XP may not support that. But to allow IE6 + XP to connect, the webserver must allow SSL3 -\> so SSL3 is removed, IE6 + XP can't access the website -\> you see, it's not a problem of the certificate. The hosting company may explain the "modern browsers". Check a website with a Letsencrypt certificate via > **[SSL Server Test (Powered by Qualys SSL Labs)](https://www.ssllabs.com/ssltest/)** > > A comprehensive free SSL test for your public web servers. then you will see: Most problems are configuration problems, not certificate problems. ---
**Author:** ![mnordhoff](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/mnordhoff/32/22583_2.png) [@mnordhoff](https://community.letsencrypt.org/u/mnordhoff)\ **Post date:** [April 11, 2019, 1:49pm UTC](https://community.letsencrypt.org/t/is-a-lets-encrypt-certificate-cross-browser-compatible/90947/3 "2019-04-11T13:49:30Z")
The root CA currently used by Let's Encrypt, DST Root CA X3, is supported by virtually any modern client, and most old ones, with a couple exceptions. > **[Certificate Compatibility - Let's Encrypt](https://letsencrypt.org/docs/certificate-compatibility/)** > > The main determining factor for whether a platform can validate Let’s Encrypt certificates is whether that platform trusts ISRG’s “ISRG Root X1” certificate. Prior to September 2021, some platforms could validate our... For a typical web use case, you should be fine. Let's Encrypt is one of the most widely used CAs. Plus, do you really test your JavaScript with Android 2.3.5? > [@LordLiverpool](#): > > also some recent versions of modern browsers Which ones? Edit: > [@LordLiverpool](#): > > So I asked the WebHost provider to install an SSL cert and they wanted €90. You can get a simple "`example.com` and `www.example.com`" certificate from some CAs for like $10. ---
**Author:** ![LordLiverpool](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/lordliverpool/32/29832_2.png) [@LordLiverpool](https://community.letsencrypt.org/u/LordLiverpool)\ **Post date:** [April 11, 2019, 2:57pm UTC](https://community.letsencrypt.org/t/is-a-lets-encrypt-certificate-cross-browser-compatible/90947/4 "2019-04-11T14:57:39Z")
As I suspected they’re either ignorant of the current facts or the more likely case is, they’re deliberately squeezing customers.Either way it’s not good. IE6 has a market share of just 0.04% so I think we can safely ignore it. > **[Internet Explorer 6 | Market share](https://en.wikipedia.org/wiki/Internet_Explorer_6#Market_share)** > > Internet Explorer 6 was the most widely used web browser during its tenure (surpassing Internet Explorer 5.x), attaining a peak percentage in usage share during 2002 and 2003 in the high 80s\[contradictory\], and together with other versions up to 95%.\[citation needed\] It only slowly declined up to 2007, when it lost about half its market share to Internet Explorer 7 and Mozilla Firefox between late 2006 to 2008. > IE6 remained more popular than its successor in business use for more than a year aft... Thanks very much for the information gentlemen, it looks like I will be moving hosting providers asap. ---
**Author:** ![system](https://global.discourse-cdn.com/letsencrypt/original/3X/c/a/ca6c06ea1ea201324bba7048c6841ce60236468d.png) [@system](https://community.letsencrypt.org/u/system)\ **Post date:** [May 11, 2019, 2:57pm UTC](https://community.letsencrypt.org/t/is-a-lets-encrypt-certificate-cross-browser-compatible/90947/5 "2019-05-11T14:57:47Z")
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