01 / INTERCEPT
Inspect modern application traffic
HTTPS MITM, HTTP/1.1, multiplexed HTTP/2, WebSocket frames, breakpoints, scripts, and repeatable rules.
Native diagnostics suite · v4
See the traffic.
Shape the network.
A focused desktop lab for inspecting HTTP and TLS, controlling DNS, testing captive portals, and understanding every connection on your network.
LinuxWindowsmacOS
C++ / Qt 6
PROXY / LIVE TRAFFIC
18 exchanges
Listening :8080
MethodHost / pathProtocolStatusTime
GETapi.console.test/v2/sessionH220042 ms
POSTauth.console.test/tokenH220081 ms
WSpresence.console.test/liveWSS101Live
GETcdn.game.test/assets/configH130416 ms
OverviewHeadersBodyTLSTiming
REQUESTGET /v2/sessionHTTP/2 · TLS 1.3
REMOTE10.0.0.42 → 104.18.2.1Cloudflare, Inc.
One native toolkit for
HTTP + TLSDNSWebSockets
Packet captureCaptive portals
Beyond a web proxy
One clear view across
the whole diagnostic path.
Move from application traffic to DNS behavior and raw network connections without rebuilding your setup in three different tools.
02 / RESOLVE
Own the DNS path
Forward, block, redirect, sinkhole, and log queries with a dedicated local DNS server.
03 / DISCOVER
Understand the network
Discover devices, resolve MAC vendors, identify consoles, aggregate flows, filter with BPF, and record PCAP.
04 / SIMULATE
Build real network test scenarios
Launch captive portals, redirect to local or remote experiences, apply console profiles, shape responses, and preserve the entire session.
Built for the investigation
From unknown behavior
to evidence in minutes.
Start with guided setup. Capture exactly what matters. Preserve the result as a project, HAR, PCAP, or JSON event stream.
01
GUIDED ONBOARDING
Connect the device your way.
Choose forward proxy, reverse, upstream, SOCKS, transparent capture, or passive adapter monitoring.
↔Forward proxy
⇆Reverse target
⌁SOCKS 5
◎Packet capture
Pick the right instrument
How Pr0xy 4 compares.
No single tool wins every job. Pr0xy 4 combines web debugging with guided network diagnostics; specialist tools remain strongest in their own domains.
| Capability |  Pr0xy 4 |
Fiddler | Charles | mitmproxy | Burp Suite |
|---|---|---|---|---|---|
| HTTPS MITM + HTTP/1.1 | Strong | Strong | Strong | Strong | Strong |
| Multiplexed HTTP/2 | Built in | Strong | Supported | Strong | Deep tooling |
| HTTP/3 / QUIC | Detect + control | Limited | Limited | Supported | Limited |
| Rules + breakpoints | Built in | Rules | Rewrite + breakpoints | Python addons | Advanced |
| WebSocket inspection | Built in | Supported | Supported | Strong | Strong |
| Live adapter capture | BPF + PCAP | Proxy only | Proxy only | Proxy flows | Proxy only |
| DNS interception | Dedicated server | Host overrides | DNS spoofing | DNS mode | External tooling |
| Device + console discovery | Guided | — | — | — | — |
| Connection telemetry | Live flow view | HTTP sessions | HTTP sessions | Proxy flows | Site map |
| Captive portal lab | Built in | — | — | Custom addon | — |
| Projects + HAR | Import + export | Sessions + HAR | Sessions + HAR | Flow files | Projects |
| Headless automation | CLI + JSON | CLI options | CLI options | Best in class | Extender API |
Based on current product capabilities and public competitor documentation. Labels describe product scope, not benchmarked performance or security assurance.
Designed with intent
Powerful should still feel understandable.
Native and focused
A responsive C++ and Qt desktop application—not a browser shell around a remote service.
Evidence over mystery
Clear state, explicit modes, visible rules, useful errors, and exportable sessions.
Built for authorized diagnostics
Tools for your devices, applications, and networks with responsible defaults and transparent controls.
SKFU's Pr0xy 4
Your network is already telling you what happened.
Now you have one place to listen.
Linux · Windows · macOS