What is the HAR File Analyzer?
Loads a .har file exported from your browser's DevTools Network tab and lets you browse every recorded request as a sortable, paginated list with full request and response header details.
How it works
The file is read locally with the browser's FileReader API and parsed as JSON — it never leaves your machine. Each entry's method, status, URL, timing, and size are rendered as a row that expands to show the raw request and response headers; results are paginated because a real HAR export can easily contain thousands of entries, which would make rendering everything at once sluggish.
SysAdmin & security use cases
- Find which specific request was slow in a page load without re-opening DevTools.
- Check whether a request accidentally included cookies or an Authorization header it shouldn't have.
- Review a colleague's exported HAR file for a bug report without needing them to share their screen.
- Copy a single request's raw headers to reproduce it with curl.