Online HAR File Analyzer
Visualize HAR file contents and generate a network request waterfall.
Drop HAR file here to view
View HAR file contents
What are HAR files?
The HTTP Archive (HAR) format records what network requests are made by the browser when accessing a website.
HAR request waterfall
A network request waterfall shows how long each network request took and when during the page load process it was made.
Open HAR file to inspect network request details
File size, response status, priority, and more
Click each request to expand it and view additional details.
HTTP request and response headers
View the HTTP request and response headers for each network request.
Check response bodies and size
View HTTP response bodies
See how the server responded to each browser request.
Optimize response size
Get a detailed size analysis for HTML and CSS responses to see what contributes to their download size.
Collect page speed data in a controlled environment
More detailed page speed data
HAR files just show basic info on network requests. But a full page speed test will tell show you key performance metrics and a rendering filmstrip showing when content becomes visible.
Extra request details
See what requests are render-blocking, what resources are preloaded, and how different resources related to each other.
