API Response Time Analyzer
Drag and drop a .har file exported from your browser's network tab or tools like Postman/Insomnia. This tool parses the requests completely in your browser without sending sensitive data to a server. It computes percentile response times, identifies the top 5 slowest endpoints, and provides a visual breakdown of wait, DNS, TLS, and receive times.
HAR Performance Analyzer
Client-Side Only
Upload a .har file
Export an HTTP Archive file from your browser's Network tab or Postman. We will parse it locally in your browser to extract performance percentiles.
Frequently Asked Questions(click to expand)
Is my data sent to a server?
No. This feature is completely client-side. We use JavaScript's FileReader API to parse the HAR JSON directly in your browser tab. No requests or sensitive payloads are ever transmitted to our servers.
What is P95?
The 95th percentile (P95) means that 95% of the requests were faster than this value, and 5% were slower. Removing the 5% outliers provides a much more accurate picture of normal performance than calculating an average.