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Serial Port AssistantSerialTest
Free

Free and open source under the GPL-3.0 licence.

 Free

Free and open source, licensed under the GPL-3.0.

Windows, macOS, Linux, Android Windows, macOS, Linux, Android
  • Runs on Windows, Linux, macOS and Android
  • Long-maintained project with hundreds of commits
  • Serial, Bluetooth SPP, Bluetooth LE, TCP and UDP in one tool
  • Realtime plotter for incoming data
  • Interface and documentation lean toward technical users
  • Little feature detail on the project page
  • Bluetooth LE support is client only
  • Interface aimed at engineers rather than casual users
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0 License: GPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 1, 2026

Checked October 1, 2026

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