Best Port Serial Adapters of 2026
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Port Serial Adapters are essential devices for connecting serial devices to a computer or laptop. They come in various types, such as USB to RS232, RS485, or RS422 adapters. These adapters are easy to use, and they allow users to connect legacy serial devices to modern computers that no longer have serial ports. They are commonly used in industrial automation, manufacturing, and healthcare industries. With Port Serial Adapters, users can avoid the cost of replacing legacy serial devices and enjoy seamless connectivity to their computers.
At a Glance: Our Top Picks
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Top 10 Port Serial Adapters
StarTech.com USB to Serial RS232 Adapter
The StarTech.com USB to Serial RS232 Adapter is a portable and versatile device that allows you to connect, monitor, and control a serial device through USB. It features broad compatibility with USB 1.0 or 2.0 ports and works with Windows, Mac, or Linux systems. The adapter also supports fast transfer speeds up to 921.6Kbps and is USB-powered, requiring no additional power adapter. Its lightweight design makes it ideal for professionals on the go.
JSAUX 4K DisplayPort to HDMI Adapter 2-Pack
Tripp Lite USB to Serial Adapter
The Tripp Lite Keyspan High-Speed USB to Serial Adapter connects a serial device to a USB computer with plug-and-play convenience. It draws power directly from your computer and supports data transfer rates up to 230 Kbps, twice the speed of a standard built-in serial port. The DB9 serial port is seen as a COM port by your computer, and is available for use by any program that accesses COM ports. Additionally, an LED shows adapter status and data activity at a glance.
StarTech.com USB to Serial RS232 Adapter
The StarTech.com USB to Serial RS232 Adapter - DB9 Serial DCE Adapter Cable with FTDI - Null Modem - USB 1.1 / 2.0 - Bus-Powered (ICUSB232FTN) offers maximized portability and compatibility with your Windows, Mac, or Linux systems. It features a single cable design that eliminates the need for additional adapters and cables. This serial adapter can convert your available USB port into a null modem RS232 DB9 serial port, which resolves any DTE/DCE conflicts. It also supports fast transfer speeds of up to 921.6Kbps.
OIKWAN USB to RS232 Adapter
The OIKWAN USB to RS232 Adapter with FTDI Chipset is a high-quality, reliable and convenient solution for connecting serial devices to your Windows, MAC or Linux system. The latest FTDI chipset ensures fast and stable operation, while the gold-plated USB RS232 connector and PVC cable provide excellent performance and durability. With plug-and-play installation, this USB-powered adapter cable supports a transfer rate of up to 1Mbps and can be used with a wide range of devices, including modems, scanners, printers and more.
DTech USB to RS422 RS485 Serial Port Converter Adapter Cable
Introducing the DTech USB to RS422 RS485 Converter - a high-quality adapter cable that allows you to easily connect RS485 or RS422 devices to your laptop or PC computer via USB. With built-in LED Troubleshooting Indicators, this converter ensures a seamless and hassle-free connection. It is ideal for industrial environments, providing surge protection and ESD isolated protection on signal pins to safeguard your control equipment against electrical damage. Equipped with a reliable FTDI chipset (FT232) and I/O auto conversion circuitry, this converter guarantees high performance and stability. Compatible with Windows 11, 10, 8, 7, XP, and Mac, this plug-and-play converter requires no power supply. Say goodbye to IRQ and COM port conflicts, as this converter eliminates the need for additional system resources. Enjoy half duplex communication with RS485 and full duplex communication with RS422. Upgrade your connectivity with the DTech USB to RS422 RS485 Converter.
DB9 Null Modem Male to Female Slimline Adapter 2 Pack
The DB9 Null Modem Male to Female Slimline Adapter 2 Pack converts standard straight wired cables to null modem wiring with pin 9 open. Its slimline design reduces leverage strain on computer ports, while the UL grade 94V-0 connector insulator satisfies flammability requirements. Additionally, the screws are removable and reversible for easy installation and flexibility.
StarTech.com USB to RS232 Serial DB9 Adapter Cable
The StarTech.com USB to RS232 Serial DB9 Adapter Cable is a professional-grade solution that offers broad compatibility for connecting legacy or industrial RS232 serial devices to a laptop or desktop computer through USB. The adapter retains assigned serial COM port values in nonvolatile memory to automatically be assigned to the adapter serial port if disconnected and reconnected. With versatile functionality, this USB serial adapter is used to connect, monitor, and control industrial sensors and equipment, as well as control LED and digital signage boards.
ANMBEST 10PCS DB9 Female Breakout Connector,DB9 Solderless RS232 D-SUB Serial to 9-pin Port Terminal Adapter Connector Breakout Board
StarTech.com 4 Port USB to Serial RS232 Adapter
The StarTech.com USB to Serial RS232 Adapter is a rugged and durable device, designed for industrial settings. It has four ports and an all-metal enclosure. The adapter features COM retention capabilities to maintain COM port assignments when rebooting. It is easy to install and use, with no external power adapter required. The adapter comes with integrated wall mount brackets and DIN Rail clips, providing versatile mounting options.
Frequently Asked Questions (FAQs)
1. What are serial adapters?
If you do not have a serial connection port on your computer, you'll need to have a USB to serial adapter. This will convert the serial signal you are connected to into a digital signal that your computer will read through the USB cable it is connected to, also known as the host.
2. What is a USB to serial port adapter?
A USB to serial adapter, also referred to as a USB serial converter or RS232 adapter is a small electronic device which can convert a USB signal to serial RS232 data signals. RS232 is the type of signal which is in many older PCs and is referred to as a serial COM port.
3. Can a serial port be converted to USB?
Many older peripherals use serial plugs, but you can adapt them to USB ports with a converter plug. To connect a monitor, printer, or other device with a serial plug to a computer lacking serial ports, you need to buy a serial-to-USB converter plug or cord. These are widely available online or at electronics stores.
4. Is serial port outdated?
The serial port used to be found on almost all new PC's but not anymore. Thus as of 2008, it's becoming obsolete, if not already obsolete. It's often called a "legacy" device, but it's still used by some for hardware designed to connect to the serial port especially for computers used as servers by companies.
During our port serial adapter research, we found 24 port serial adapter products and shortlisted 10 quality products. We collected and analyzed 53,214 customer reviews through our big data system to write the port serial adapters list. We found that most customers choose port serial adapters with an average price of $17.85.
The port serial adapters are available for purchase. We have researched hundreds of brands and picked the top brands of port serial adapters, including StarTech, JSAUX, TRIPP LITE, OIKWAN, DTECH. The seller of top 1 product has received honest feedback from 384 consumers with an average rating of 4.7.
Mike Davis is a professionally trained electrician with six years of working experience in the electronics industry. He has written an array of web and mobile-based articles for e-magazines and blogs. He loves trying out some novel and popular gadgets and his expertise is in the areas of electronics and computers which is built over many years of working and personal experiences.