HAR Analyzer
Analyze HTTP Archive files — waterfall chart, request statistics, errors
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Your file never leaves the browser
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Common Mistakes
Frequently Asked Questions
What is a HAR file?
HAR (HTTP Archive) is a standard format for recording all HTTP requests and responses when loading a web page. The file contains URLs, headers, timings, sizes, and response codes for each resource.
How to export HAR from Chrome?
Open DevTools (F12) → Network tab → load the page → right-click → Save all as HAR with content. The file will be saved with a .har extension.
Is it safe to upload a HAR file?
Completely safe — the file is processed entirely in your browser via JavaScript. Data is NOT sent to the server and never leaves your computer.
What does the waterfall chart show?
The waterfall chart visualizes the order and timing of each resource load. Bar colors represent phases: DNS lookup, TCP connection, SSL handshake, TTFB wait, and data download.
Related guides
Longer-form reading on this topic from the knowledge base.
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