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What's a HAR file?

A HAR file is a log of HTTP requests, typically exported from a web browser. More info at this Wikipedia article.

How do I capture a HAR file?

This varies from browser to browser. There are guides for some of them here.

How do I view/analyze a captured HAR file?

I recommend Google's HAR Analyzer for this.

Why should I clean a HAR file?

A HAR file captured via the browser usually includes a lot of noise, like requests to fetch assets (images, CSS), analytics requests and requests from social widgets (to name a few).

It's usually a good idea to clean these up before sending the HAR file to a reviewer, so they can focus only on the important requests.

Even if you are the reviewer yourself, you can clean the HAR file first to remove the clutter.

How do I use HAR Cleaner?

  1. Open a HAR file from the 'Choose a HAR file' button.
  2. Uncheck any requests that you want removed.
  3. Use the search option to quickly wipe out large chunks of similar requests.
  4. Click 'Save' button to download the cleaned HAR file. The new file will have a _cleaned suffix in the filename.
Uncheck the requests you want to remove and hit 'Save'.
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