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Bit-TwistTcpreplay
Free

Free and open source under GPL-2.0-or-later.

 Free

Free and open source under the GPLv3.

Windows, macOS, Linux, Command line Command line
  • Replays and edits captured PCAP traffic
  • Can generate packets from built-in templates
  • Replays captures at original timing, a set rate or line rate
  • Rewrites addresses, ports, VLAN tags and checksums
  • Windows builds require Npcap
  • Command-line only, with no graphical interface
  • Requires existing packet captures to work from
Downloadable app Downloadable app
Open source Open source
License: GPL-2.0-or-later License: GPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 8, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.