Virtual local port
Remote applications can connect through a familiar COM or TTY-style port instead of learning a new tool.
Virtual COM & serial sharing
Bring a remote serial port to your desk
Open a physical serial port on the host and present a usable local port to the remote engineer. Keep familiar terminal, flashing, diagnostic, and monitoring tools in the workflow.
What you can do
Built around the job, not the jargon
Flashing-ready controls
Common baud rates, hardware flow control, software flow control, and the DTR/RTS signals used by many boards are supported.
Industrial serial access
Use RS-232, RS-485, UART, Modbus serial equipment, console ports, and field devices from a remote location.
Exclusive use
NullPort prevents two sessions from taking control of the same physical serial port at once.
Cross-platform pairing
Connect Windows, Linux, macOS, Raspberry Pi, and other supported embedded endpoints.
Resilient sessions
Live sessions report real port-open results and handle recoverable read interruptions without hiding permanent failures.
A clear workflow
From invitation to completed work
- 1
Select the port
Choose the detected port and the settings your equipment expects.
- 2
Invite a guest
Share the one-use 12-character code with the person who needs access.
- 3
Open it locally
The guest chooses the local port name and continues in their usual application.
Common questions
Good to know
Can I flash an ESP32, STM32, or Arduino remotely?
Yes, when the board and flashing tool use a supported serial or USB workflow. NullPort carries the data and the control signals commonly required to enter programming mode.
Are custom baud rates supported?
NullPort supports common high-speed rates and negotiates compatible settings between endpoints. Hardware and operating-system limits still apply.
Can two people control one serial port?
A physical serial port is held exclusively for the active control session to avoid conflicting commands.
Start today
Try it with your own equipment.
The free trial begins with your first sharing invitation and includes the standard feature set.