EXT-05 · NETWORK ANALYZER · LIVE ON CHROME

NetSniffer

Wireshark-inspired network traffic analyzer with a cyberpunk FUI. Capture, inspect, replay, mock.

Install from Chrome Web Store Privacy dossier

SerialEXT-05

Version0.4.0

RuntimeChrome MV3

NetworkNO DEVELOPER CLOUD

Permissions6 granted

Host scopelocalhost + 127.0.0.1

01 /Overview

NetSniffer brings professional-grade network analysis to the browser. Driven by the Chrome DevTools Protocol, it captures XHR, Fetch, WebSocket and every other resource type in real time — with per-tab isolation and a ring buffer holding 5,000 packets per tab.

Inspect headers and bodies with syntax highlighting and smart decoding for Base64, URL encoding and JWT; break down timing from DNS to TTFB; filter with a query syntax and regex. Then replay, modify or mock requests — or export to cURL, fetch, axios and HAR.

Granted permissions

debugger sidePanel tabGroups tabs scripting activeTab

02 /Capabilities

Real-time capture via Chrome DevTools Protocol
Per-tab isolation with a 5,000-packet ring buffer
JSON tree viewer and DNS → TTFB timing breakdown
Smart decode for Base64, URL encoding and JWT
Filter syntax with regex: status:200 method:POST
Replay, mock, export to cURL / fetch / axios / HAR

03 /Field captures

NetSniffer workspace showing captured network traffic — FIG. 01 — CAPTURE WORKSPACE

NetSniffer packet inspection view — FIG. 02 — PACKET INSPECTION

NetSniffer filtering and analysis interface — FIG. 03 — FILTER & ANALYZE

04 /Privacy dossier

Processes browsing activity, website content and authentication data locally for user-requested traffic analysis. The developer never receives captured traffic.

No analytics, advertising or cloud backend. User-directed requests go only to selected endpoints, while optional MCP access uses an authenticated loopback-only bridge.

Read the full policy