If you are creating your JMeter test plan from Fiddler or any other chrome extensions, you can easily generate JTL log file using JLog solution.

We recommend you to sign up for Pro plan to make use of premium features. 

  1. Launch JLog app under Solutions > JLog
  2. Click on HTTP Archive button to upload your HAR file
  3. Click on Generate JTL Recording Log
  4. Click on Save File and then click on OK

JTL file will be saved into your local folder.