Upload Your HAR File
Start analyzing your network performance in seconds.
New: Convert your HAR into ready-to-run k6 and JMeter test plans.
Accepts .har, .json, or .txt files containing HAR-formatted data.
Free HAR Analysis Online
HAR Analyzer is a purpose-built tool for HAR analysis online. Upload a HAR file from Chrome, Firefox, or your automated browser tests and we will surface the slowest requests, blocking scripts, and payload sizes without installing desktop software.
Turn every capture into actionable insights: review an interactive waterfall, drill into request and response headers, and spot redirects or cache misses instantly. It is the fastest way to translate HTTP Archive data into concrete performance fixes.
Convert HAR to Load Tests
Generate a HAR to k6 test in one click. Choose the request types you want to simulate, set virtual users, and export a scripted scenario that mirrors real browser traffic.
Prefer Apache JMeter? Produce a HAR to JMeter JMX file with thread groups, listeners, and headers already configured so you can start distributed load testing immediately.
Why teams choose HAR Analyzer
- Secure in-browser parsing keeps HAR data inside your session.
- Filter noisy requests to focus on APIs, third parties, or render blocking assets.
- Share deep links with teammates so everyone sees the same HAR breakdown.
- Export optimized load testing scripts without rewriting network flows.
HAR Analysis FAQs
What can I learn from HAR analysis online?
Online HAR analysis reveals how every asset loads, which servers respond slowly, and where caching or compression is missing. Because HAR Analyzer runs in the browser, you can troubleshoot performance from anywhere without sending data to third parties.
How do I convert a HAR file to a k6 test?
Upload your archive and select the requests you want to exercise. We generate a k6 script with sensible thresholds, options, and custom virtual user settings so you can replay real-world traffic patterns in your CI pipeline.
Can I export a HAR file to a JMeter JMX plan?
Yes. Choose the Apache JMeter export and download a fully structured HAR to JMeter JMX test plan with thread groups, ramp-up schedules, and listeners ready to open in your favorite load testing runner.