About Private HAR Waterfall Analyzer & HTTP Archive Inspector
100% Client-Side HTTP Archive (.har) visualizer and network trace inspector. Inspect page load waterfalls, DNS lookup latency, TCP connect, SSL handshake, Time to First Byte (TTFB), and content download timings without uploading confidential API authorization headers, session cookies, or user tokens to third-party cloud servers. Features automatic sensitive header redaction, status code filtering, and sanitized export.
Key Capabilities & Features
- Zero-upload client-side HAR parsing directly from Chrome, Firefox, Safari, and Edge DevTools
- Interactive horizontal waterfall bars with color-coded phases (DNS, TCP, SSL, TTFB, Download)
- Automatic token and cookie redaction with one-click Sanitized HAR export
- Filter by HTTP status codes (2xx, 3xx, 4xx, 5xx) and resource types (XHR, JS, CSS, Img)
- Detailed request and response header inspector with millisecond phase breakdowns
How to Use Private HAR Waterfall Analyzer & HTTP Archive Inspector
Upload HAR File
Drop your .har file exported from browser DevTools (Network tab -> Export HAR).
Inspect Waterfall
Click any request in the timeline to inspect timing latency and response headers.
Export Sanitized
Download a sanitized HAR with all authentication bearer tokens and cookies safely redacted.
Privacy & In-Browser Execution Guarantee
100% Client-Side. Your HAR files contain private session cookies, API tokens, and user credentials. They are analyzed strictly in browser RAM and never transmitted anywhere.
Frequently Asked Questions
Why is uploading HAR files to online tools dangerous?
HAR files record raw HTTP headers, which frequently include sensitive Bearer authorization tokens, API keys, password reset links, and session cookies. NEOKYRU inspects HAR files 100% in your local browser with zero cloud storage.
What is TTFB in the waterfall chart?
TTFB (Time to First Byte) measures the duration from when the client completes sending the request until the first byte of response data arrives from the server. High TTFB indicates slow backend server or database processing.