Summary
HAR (HTTP Archive) is a file format used by several HTTP session tools to export the captured data used for analysis.
Question/Problem Description
How to create a HAR capture
Resolution
Internet Explorer/Edge
Edge natively produces HAR files. See detailed instructions in the
Microsoft site
-
Open the Network tool in F12 developer tools
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Reproduce the issue
-
Export captured traffic as a HAR (CTRL + S)
For Internet Explorer, you will need to use:
HttpWatch
.
-
Download and Install HttpWatch
-
Start the HttpWatch capture right before reproducing the behavior you want to study
-
Stop the HttpWatch capture right after reproducing the behavior to study
-
Export the capture to HAR format
Firefox
-
Start Firefox Developer Tools in Network mode (Top right menu > Developer > Network, or ctrl-shift-E)
-
Reproduce the issue
-
Save the capture by right-clicking on the grid and choosing "
Save all as HAR
"
-
Export the capture to a HAR file
Chrome
You can record your HTTP session using the Network tab in the Developer Tools in Chrome.
-
Open the Developer Tools from the menu (Menu > More Tools > Developer tools), or by pressing Ctrl+Shift+C on your keyboard
-
Click on the Network tab
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Look for a round button at the top left of the Network tab. Make sure it is red. If it is grey, click it once to start recording.
-
Check the box next to Preserve log
-
You can use the clear button (a circle with a diagonal line through it) right before trying to reproduce the issue to remove unnecessary header information
-
Reproduce the issue
-
Save the capture by right-clicking on the grid and choosing "
Save as HAR with Content
"