Inspect HTTP network waterfalls, latency bottlenecks, and sanitize sensitive tokens in-browser.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Drag and drop your exported Chrome/Firefox .har file or paste the JSON text directly into the workspace.
Filter requests by MIME type (XHR, JS, CSS, Media) or HTTP status (2xx, 3xx, 4xx, 5xx) and inspect timing breakdowns.
Click 'Sanitize & Export HAR' to strip sensitive Authorization and Cookie headers before sharing logs with team members.
Yes, Utilifi processes the entire HAR file 100% locally in your browser memory. No network requests, tokens, or headers are ever uploaded to any server.
Open Chrome DevTools (F12 or Cmd+Option+I), navigate to the Network tab, right-click any request row, and select 'Save all as HAR with content'.
It automatically redacts 'Authorization', 'Cookie', 'Set-Cookie', 'X-Api-Key', and other sensitive token headers from all captured entries.
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