CapAnalysis review
A focused, free PCAP analyzer for browser-based traffic investigation.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
CapAnalysis is an open-source web application for analyzing captured network traffic. It is designed for information security specialists, system administrators, researchers, engineers, developers, and students who need to inspect PCAP datasets through a browser-based interface. The product indexes single or multi-file datasets and presents TCP, UDP, and ESP streams or flows, giving it a focused role in packet and flow analysis rather than broad network-management work.
CapAnalysis is free and open source, with browser access for locally installed deployments. The published platform details specify Debian and Ubuntu systems, each in 32-bit and 64-bit versions. Capture-file support is listed for PCAP, while PCAP files can also be imported from a URL. This makes the product suitable for teams that can manage a Linux installation and want to keep analysis centered on captured traffic, but less suitable for environments requiring wider operating-system or capture-format coverage.
Its strongest area is traffic investigation depth within that scope. TCP stream reassembly and lost-byte analysis support detailed session review, while deep packet inspection identifies more than 140 protocols. Filters can narrow results by IP address, port, protocol, destination country, data volume, and date, and GeoIP-based localization adds geographic context. Choose CapAnalysis for focused, open-source PCAP visualization and protocol analysis. An alternative is more appropriate when the requirement extends beyond PCAP, Debian, or Ubuntu, or when a broader platform ecosystem is important.
CapAnalysis pros and cons
- Where it wins
- Analyzes TCP and UDP streams, flows, reassembly, and lost bytes
- Identifies more than 140 protocols through deep packet inspection
- Filters traffic by IP, port, protocol, country, volume, and date
- Where it doesn't
- Operating-system coverage is limited to Debian and Ubuntu
- Capture-file support is centered on the PCAP format
- Locally installed deployments require a Linux installation
CapAnalysis fact sheet, pricing and score →
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