Check the certificate of an APK

Following previous post, if you lost your certificate file, you have 2 problems
1/ you won't be able to update your APK on the market anymore
2/ you are unable to retrieve details about the certificate used

While there is NOTHING to do for the first problem, there is a way to retrieve the certificate information.

Coming with jdk, you should use jarsigner :

jarsigner.exe -verify -certs -verbose <app>.apk

For each file of the apk, it will give you something similar to

X.509, CN=WillNa, OU=, O=, C=FR
[certificate is valid from 19/12/10 08:38 to 19/12/35 08:38]

this is the certicate details available.