Best Port Serial Adapters of 2025

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.

The BENFEI USB to RS232 Male Serial Adapter allows you to connect serial devices such as modems, barcode scanners, and PDAs to your computer through a USB port. It features a standard USB Type A Male to Male 9-pin DB9 RS-232 serial connector and has a data transfer rate of 1Mbps. The adapter is compatible with a wide range of platforms, including Windows, MacOS, and Linux, and it comes with a Prolific PL-2303 chipset. The triple shielding and tinned copper conductor ensure the best data transfer rate, and it's powered by the USB port so there's no need for an external power adapter.

The Arnorin DB9 Adapter is designed to convert standard straight wired cables into null modem wiring, making it easier for you to connect devices that require this specific setup. With its gold contact plating, you can expect reliable connections, even after multiple uses. The slimline design minimizes strain on your computer ports, protecting them from potential damage. Additionally, the UL grade 94V-0 connector insulator ensures safety by meeting flammability standards, giving you peace of mind while using it. This adapter is a smart choice for anyone needing efficient and secure data transfer.

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.

This DB9 Serial Adapter by YIOVVOM features a screw type design and a terminal wire range of 12-24AWG. The adapter is made of metal and electric parts and comes in black and green. It has a total size of 58 x 35 x 21mm and a weight of 30g. The package includes 1 DB9 Adapter with a case and 3 protective covers. The cable hole diameter ranges from 5mm to 10mm, making it versatile for different cable sizes.

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.

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.

The DTech USB to RS232 DB9 Serial Port Adapter Cable allows your devices equipped with 9 pin female RS232 interface to communicate with your computer. The long FTDI serial cable supports Windows 11,10, 8, 7, Mac OS 8 or higher, and Linux 2.4.0 and later. This adapter is designed with a high-performance quality processor chip (FT232RL) which makes it one of the most reliable adapters on the market. The 10ft DB9 RS232 to USB adapter with a 9 pin male to USB-A male gold plated connector is beautiful and strong with blue enrich injection.

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.

The axGear USB RS232 Converter allows you to easily connect your computer's USB port to devices with RS232 ports, such as printers. This adapter supports Plug & Play, making installation a breeze on both PC and Mac systems. With data transfer rates up to 1Mbps, you can expect quick and efficient communication between devices. Additionally, it features remote wake-up and power management capabilities, enhancing your device's functionality and energy efficiency. The durable design ensures long-lasting performance, making it a reliable choice for your connectivity needs.