Best Converter Serial Adapters of 2026

The JSAUX DisplayPort HDMI Adapter lets you easily connect your DisplayPort-enabled device to an HDMI display with stunning clarity. It supports up to 4K resolution at 30Hz, providing sharp and vibrant visuals for your monitor or TV. If you want smoother motion at lower resolutions, it also supports 2K at 60Hz and 1080p at 120Hz, perfect for gaming or video playback. You won’t need any drivers or software to get started—just plug it in and go, making setup quick and hassle-free. Plus, the adapter’s durable build with gold-plated connectors ensures long-lasting performance and reliable connections for your devices.

The HiLetgo CP2102 USB 2.0 to TTL Module is a stable and reliable serial adapter that allows you to connect your MCU to your computer with ease. It features a standard USB type A male and TTL 5pin connector, with pins for 3.3V, RST, TXD, RXD, GND, and 5V. It supports a wide range of baud rates, from 300 bps to 1.5 Mbps, and is compatible with Windows, Mac OS, and Linux.

The DSD TECH USB UART Cable is a versatile tool that supports multiple TTL voltage levels including 5V, 3.3V, 2.5V, and 1.8V, allowing you to connect with a wide range of devices easily. Featuring the reliable FTDI FT232RNL chip, it offers stable and industrial-grade performance compatible with Windows, Linux, and MacOS systems, ensuring smooth communication. The included transparent protective case shields the device from static interference and accidental short circuits, giving you peace of mind during use. Additionally, the cable provides access to various pins like UART TX, RX, RTS, CTS, and more, making it convenient for detailed hardware debugging and development tasks.

The waveshare USB RS485 Adapter is an industrial-grade converter that allows fast and reliable communication between USB and RS485 devices. It comes with original FT232RL and is embedded with multiple protection circuits such as lightning-proof, resettable fuse, ESD protection, and TVS diode, ensuring stability, reliability, and safety. The adapter is small in size, easy to use, and allows automatic transceiving. It's an ideal choice for industrial control equipment and applications with high communication requirements. The onboard self-recovery fuse and protection diodes ensure stable current and voltage outputs and provide over-current/over-voltage protection, improving shock resistance. The adapter also features 3 LEDs that indicate the power and transceiver status. It supports various operating systems, including Mac, Linux, Android, WinCE, Windows 10 / 8.1 / 8 / 7 / XP.

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.

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.

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.

The Waveshare USB RS485 Converter is designed for industrial use, offering fast and stable communication thanks to its original FT232RL and SP485EEN chips. This means you can rely on smooth data transfer for your control equipment or applications. It includes built-in protection circuits that guard against lightning strikes and electrostatic shocks, helping to keep your device safe in harsh environments. The converter also has three LEDs that show power and data transmission status, so you always know what’s happening. With these features, you get a reliable, safe, and easy-to-monitor converter that fits perfectly in demanding industrial settings.

The MHQJRH Dual M.2 Adapter lets you connect two M.2 SSDs at once—one NVMe and one SATA—so you can expand your storage easily. It converts the NVMe SSD to a fast PCIe 3.0 x4 interface, giving you high-speed data transfer, while the SATA SSD connects via a standard SATA 6Gbps link, ideal for compatibility. The adapter supports multiple M.2 sizes (2230 to 22110), meaning you can use a variety of SSDs without hassle. Plus, the advanced heat sink design helps keep your drives cool with effective ventilation, protecting your SSDs from overheating during heavy use.

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.