“Debug Certificate Expired” Error in Eclipse Android Plugins

"Debug Certificate Expired" Error in Eclipse Android Plugins

22 May 2024 Stephan Petzl Leave a comment Tech-Help

Encountering the “Debug certificate expired” error while working on your Android project in Eclipse can be quite frustrating. This issue arises when the debug certificate, which is used to sign your application’s builds, has expired. Fortunately, resolving this issue is straightforward. Below, we outline the steps you need to take to fix this problem on various platforms.

Solution: Deleting the Expired Debug Certificate

To resolve the “Debug certificate expired” error, you need to delete the expired debug certificate. The Eclipse plugin will then generate a new certificate the next time you build your project. Here’s how you can do it:

For Linux and Mac OS X

  • Navigate to the ~/.android/ directory.
  • Delete the debug.keystore file.
  • In Eclipse, clean your project by going to Project > Clean.
  • Rebuild your project.

For Windows

  • Navigate to the %USERPROFILE%\.android\ directory.
  • Delete the debug.keystore file.
  • In Eclipse, clean your project by going to Project > Clean.
  • Rebuild your project.

After performing these steps, Eclipse should automatically generate a new debug certificate, and you should no longer encounter the expiration error.

Alternative Approach: Creating Your Own Debug Certificate

If you prefer not to delete your existing debug certificate, you can create a new one with a longer validity period. This approach allows you to define the expiration period. Follow these steps:

Steps to Create a New Debug Certificate

  1. Open a terminal or command prompt.
  2. Navigate to the .android directory under your home directory.
  3. Run the following command to generate a new debug certificate with a validity of 14,000 days:
  4. keytool -genkey -v -keystore debug.keystore -alias androiddebugkey -storepass android -keypass android -keyalg RSA -validity 14000
  5. Ensure keytool is available in your PATH. It is typically found in the JDK bin folder (e.g., C:\Program Files\Java\jdk1.6.0_31\bin\ on Windows).

After generating the new certificate, clean and rebuild your project in Eclipse.


By following the steps outlined above, you can quickly resolve the “Debug certificate expired” error and continue with your Android development in Eclipse. Regularly updating your debug certificate ensures a smoother development process and avoids interruptions.

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