Easy packet capture
Simple, but powerful. Choose an interface, start recording, and keep packet capture calm even when the network is busy.
TCP Viewer vs mitmproxy
The best-in-class alternative to mitmproxy
The best GUI alternative to mitmproxy, built with developers in mind.
Download TCP Viewer for MacOnly Apple Silicon - macOS 15+
Side-by-side
Why developers choose TCP Viewer instead of mitmproxy
mitmproxy is made for inspecting and changing web requests. TCP Viewer gives you a native Mac view of the network traffic around any app.
Area
TCP Viewer
mitmproxy
Native macOS
TCP Viewer
Designed and built for macOS 26, with a Mac-first look and feel that is easy to use every day.
mitmproxy
Cross-platform tools that are mainly used through a terminal or browser-based interface.
Capture all interfaces
TCP Viewer
Capture activity across all available network interfaces in one place, so important traffic is less likely to be missed.
mitmproxy
Only sees web traffic that you set up to pass through its proxy.
Detailed packets
TCP Viewer
Built on top of Wireshark, so you get familiar, Wireshark-grade packet details in a native Mac app.
mitmproxy
Shows web requests and responses instead of full packet-level detail.
Display by apps / domains
TCP Viewer
Groups traffic by app and domain, turning a busy capture into clearer conversations to scan.
mitmproxy
Groups web flows by host, but does not show all of an app's network traffic.
Advanced filters
TCP Viewer
Build focused multi-rule filters in a clear form, so everyday checks do not require complex filter syntax.
mitmproxy
Uses flow filter expressions for the web traffic moving through its proxy.
TCP Viewer MCP
TCP Viewer
Connect Codex or another MCP client to check capture status, explore interfaces, and find packets with a plain-language request. Available with TCP Viewer PRO.
mitmproxy
Does not include a built-in MCP connection.
TCP Viewer MCP
Ask your AI agent about the packets
Connect TCP Viewer to Codex or another MCP client. Check capture status, explore interfaces, and find the packets that matter with a plain-language prompt.
Available with TCP Viewer PRO.
Saved captures
Open PCAP and PCAPNG files by drag and drop
Bring an existing capture into TCP Viewer and preview the packets right away, with no fresh recording session required.
Drag in a trace
Drop PCAP or PCAPNG files straight onto TCP Viewer.
Preview immediately
Open the packet list and decoded detail view without a live capture.
Keep the workflow native
Review saved evidence in the same Mac-first packet interface.
Drop capture.pcapng to preview
Inspect without the clutter
Whatever you capture, TCP Viewer keeps the important traffic readable. Filter noise, open decoded fields, and save evidence for the next debug session.
Grouped traffic
Group packets by domain or client
Collapse busy captures into readable conversations by domain or client, then jump straight to the traffic that matters.
Protocol filters
Quickly filter TCP, UDP, DNS, and more
Tap protocol chips to focus the packet list without rebuilding a complex filter every time the capture changes.
Export captures
Save evidence as PCAP or PCAPNG
Package the exact packets you need into standard capture files for Wireshark, teammates, or the next debug session.
Export selected packets
Capture range
AllFilteredSelected
Packets1,284
Duration02:16
ProtocolsTCP, DNS, TLS
File format
.pcapngFull metadata.pcapClassic format
Filename
filtered-capture.pcapng
Packet detail
Read Wireshark-grade packet data
Open decoded fields, protocol trees, byte ranges, and field values with Wireshark-grade depth in a focused Mac interface.
GPL open source
Inspect the app, not just the packets.
TCP Viewer is open source under the GPL license, so developers and security-sensitive teams can review how capture, decoding, and packet handling work.
ProxymanApp/TCPViewer
GPL-2.0Public repoNative macOS
license: GPL v2
source: github.com/ProxymanApp/TCPViewer
review: capture pipeline, decoders, packet UI
Built in the open for people who want their network tools to be understandable.
Audit the code, follow releases, or contribute directly from GitHub.
Built by Proxyman Team
Crafted by the Proxyman Team
From the makers of Proxyman and Tiny Shield. TCP Viewer carries the same Mac-first care into packet capture, filtering, and inspection.
Used by 500,000+ usersRead testimonials
Trusted by developers
Privacy first
Built for macOS
