Error: Invalid or Corrupt Jarfile — How to Fix It

Java found the file but can't read it as a JAR. Spot an HTML page saved as .jar, a cut-off download or a Git LFS pointer, then get a working copy of server.jar.

Step 1: Check the File Online

Step 2: Look at the First Bytes

Step 3: Get a Complete Copy

Step 4: If the Archive Is Fine

A Different Error? Check Which One You Have

Summary