Best Serial Adapters of 2025

The StarTech.com USB to RS232 Adapter is designed for maximised portability, allowing you to convert a USB port into an RS232 DB9 serial port. This is particularly useful for connecting, monitoring, and controlling serial devices. With broad compatibility, you can easily use it with your USB 1.0 or 2.0 ports on Windows, Mac, or Linux systems. Experience fast transfer speeds with a Baud Rate of up to 921.6Kbps, ensuring efficient data transfer. Its lightweight design fits conveniently into your carrying case, making it ideal for professionals who are always on the move.

The StarTech Serial Cable Adapter is a reliable solution for converting DB-9 female connections to DB-25 male connections. This is particularly useful for connecting older serial devices to modern equipment, allowing you to maintain compatibility with legacy technology. Its straightforward design makes it easy to use, ensuring hassle-free installation and operation. With durable construction, you can count on this adapter for consistent performance over time, helping you streamline your setup with minimal effort.

The BENFEI USB Serial Adapter allows you to connect various serial devices such as modems, barcode scanners, and digital cameras to your computer via a USB port. With a data transfer rate of 1Mbps, it ensures quick communication between your devices. The adapter features a standard USB Type A Male connector to a 9-pin DB9 RS-232 serial connector, making it versatile for different applications. Additionally, the tinned copper conductor and triple shielding provide optimal data transfer performance, making it a reliable choice for your connectivity needs.

The SABRENT USB Serial Adapter is designed to connect various serial devices to your computer effortlessly. With its USB to RS232 functionality, you can link devices like modems, cameras, and routers, providing a convenient solution for older technology. The Prolific chipset ensures wide compatibility with numerous operating systems, making it versatile for different users. Its triple-shielding design protects against interference, enhancing data transfer rates for reliable communication. Plus, the easy plug-and-play feature means you can set it up quickly without any hassle.

The StarTech.com RS232 Adapter provides a reliable way to connect legacy serial devices to your computer via USB. With broad compatibility, you can easily integrate it with various operating systems, including Windows, Linux, and Mac OS. The COM retention feature ensures that your assigned serial COM port values are saved, making reconnection hassle-free. Its versatile functionality allows you to monitor and control industrial sensors and even digital signage boards, enhancing your connectivity options.

The StarTech USB to Serial Adapter offers excellent portability with its single cable design, eliminating the need for extra adapters and cables. You can easily convert your USB port into a null modem RS232 DB9 serial port, effectively resolving DTE/DCE conflicts. Its broad compatibility means it works seamlessly with USB 1.0 or 2.0 ports across Windows, Mac, and Linux systems. Additionally, you will appreciate the fast transfer speeds, supporting up to 921.6 Kbps, ensuring efficient data transfer for your devices.

The YIOVVOM DB9 Adapter offers a convenient solution for connecting serial devices without the need for soldering. Its screw-type design allows for easy wiring, accommodating wire ranges from 12-24 AWG. You will appreciate the environmentally friendly copper terminal design, which eliminates the hassle of using a soldering iron. The compact size and folding buckle housing make assembly and disassembly simple, ensuring a user-friendly experience every time you need to adjust connections.

The Xiatiaosann DB9 Adapters offer a practical solution for connecting DB9 serial cables with mismatched interfaces. With two DB9 male to male, two female to female, and two male to female converters, you can easily adapt your connections without purchasing additional cables. Each adapter is fully shielded, protecting against unwanted EMI/RFI interference, ensuring reliable data transfer. This versatility makes it ideal for various devices including computers, digital machine tools, and industrial instruments, enhancing your setup's efficiency.

The ATEN UC232C Adapter is designed to support the RS-232 serial interface, making it ideal for connecting legacy serial devices to modern computers. Its excellent anti-electromagnetic interference (anti-EMI) capability ensures stable transmission performance, meaning you can rely on consistent data flow without disruption. This adapter is fully compliant with USB specifications, ensuring compatibility with a wide range of devices. Additionally, it supports impressive data transfer rates of up to 921.6 Kbps, allowing you to transfer data quickly and efficiently.

The Fasizi USB to TTL Adapter is a compact module, measuring just 4 x 2.2 cm, making it easy to integrate into your projects. With a brand new CH340G original chip, you can expect reliable performance for serial communication tasks. The switching output supports both 3.3V and 5V, providing versatility for different applications. Additionally, the module features indicator lights for power (PWR), transmit (TXD), and receive (RXD), allowing you to monitor the status easily and ensuring seamless operation.