# Let's Encrypt cert not trusted by Android **URL:** \ **Category:** Help\ **Created:** [April 7, 2018, 12:30pm UTC](https://community.letsencrypt.org/t/lets-encrypt-cert-not-trusted-by-android/58867 "2018-04-07T12:30:07Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Moonlighter](https://avatars.discourse-cdn.com/v4/letter/m/ce7236/32.png) [@Moonlighter](https://community.letsencrypt.org/u/Moonlighter)\ **Post date:** [April 7, 2018, 12:30pm UTC](https://community.letsencrypt.org/t/lets-encrypt-cert-not-trusted-by-android/58867/1 "2018-04-07T12:30:07Z")
Hello, So here is my problem, I have a certificate for my site, for the site I use the pem files, however, I have certain software running that requires a .pfx file so i converted the pem files to pfx with open SSL. When I open the site software that uses the .pfx file in a browser (either on Chrome on Android, or in Firefox on my desktop) the cert is trusted, however when I connect with an app to the site, the following information appears in the log: > java.security.cert.CertPathValidatorException: Trust anchor for certification path not found. So it seems Android itself does not trust the certificate, I hope my story is clear and somebody can help me, Thanks in advance! Ronald ---
**Author:** ![Rip](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/rip/32/70863_2.png) [@Rip](https://community.letsencrypt.org/u/Rip)\ **Post date:** [April 7, 2018, 3:55pm UTC](https://community.letsencrypt.org/t/lets-encrypt-cert-not-trusted-by-android/58867/2 "2018-04-07T15:55:33Z")
Hi @Moonlighter … Can you give us your domain name so we can be more efficient in providing help for you? There is some relevant info on the stack. Please take a look at: [Trust Anchor not found for Android SSL Connection](https://stackoverflow.com/questions/6825226/trust-anchor-not-found-for-android-ssl-connection#16302527) Rip ---
**Author:** ![sahsanu](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/sahsanu/32/89984_2.png) [@sahsanu](https://community.letsencrypt.org/u/sahsanu)\ **Post date:** [April 7, 2018, 4:01pm UTC](https://community.letsencrypt.org/t/lets-encrypt-cert-not-trusted-by-android/58867/3 "2018-04-07T16:01:06Z")
Hi @Moonlighter, > [@Moonlighter](#): > > I have certain software running that requires a .pfx file so i converted the pem files to pfx with open SSL How did you convert the certificate to pfx?. You should include the `fullchain.pem` (it includes your cert and the intermediate cert), something like this: `openssl pkcs12 -export -out certificate.pfx -inkey /etc/letsencrypt/live/yourdomain.tld/privkey.pem -in /etc/letsencrypt/live/yourdomain.tld/fullchain.pem` Above command will ask for a password. Hope this helps. Cheers, sahsanu ---
**Author:** ![Moonlighter](https://avatars.discourse-cdn.com/v4/letter/m/ce7236/32.png) [@Moonlighter](https://community.letsencrypt.org/u/Moonlighter)\ **Post date:** [April 7, 2018, 10:50pm UTC](https://community.letsencrypt.org/t/lets-encrypt-cert-not-trusted-by-android/58867/4 "2018-04-07T22:50:53Z")
@sahsanu @Rip Thanks for the replies! You where right sahsanu, I forgot to include the \> fullchain.pem. Was automating some things in bash because I’m following a course in programming in R, so I thought I can use this for more, but in my haste forgot the include the \> fullchain.pem Thanks again, working like a charm right now! Moonlighter ---
**Author:** ![system](https://global.discourse-cdn.com/letsencrypt/original/3X/c/a/ca6c06ea1ea201324bba7048c6841ce60236468d.png) [@system](https://community.letsencrypt.org/u/system)\ **Post date:** [May 7, 2018, 10:51pm UTC](https://community.letsencrypt.org/t/lets-encrypt-cert-not-trusted-by-android/58867/5 "2018-05-07T22:51:03Z")
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