Convert PCAPNG to PCAP

Understanding pcapng and pcap file formats

PCAPNG (Packet Capture Next Generation) and PCAP (Packet Capture) are both file formats used to store network packet data captured by network analysis tools. PCAP is the older, simpler format, widely supported by tools like Wireshark and tcpdump. PCAPNG is a more advanced format that supports additional metadata, multiple interfaces, and enhanced features, making it suitable for complex capture scenarios.

Why convert pcapng to pcap?

Converting pcapng to pcap is often necessary when working with legacy tools or systems that only support the older pcap format. Some analysis scripts and network appliances may not recognize the newer pcapng format, making conversion essential for compatibility.

How to convert pcapng to pcap

The most reliable way to convert pcapng files to pcap is by using Wireshark or its command-line utility editcap. Both are free and cross-platform.

Using Wireshark

1. Open your pcapng file in Wireshark.
2. Go to File → Export Specified Packets.
3. In the Save as type dropdown, select pcap.
4. Choose your destination and click Save.

Using editcap (command-line)

1. Install Wireshark, which includes editcap.
2. Run the following command:
   editcap -F libpcap input.pcapng output.pcap

Best software for pcapng to pcap conversion

• Wireshark – The most popular and user-friendly network protocol analyzer, supporting both formats.
• Editcap – A command-line tool bundled with Wireshark, ideal for batch conversions and automation.

Conclusion

Converting pcapng to pcap is straightforward with tools like Wireshark and editcap. This ensures compatibility with a wide range of network analysis tools and legacy systems.