Top 10 Round Serial to USB Adapter – Serial Adapters

As an Amazon Associate I earn from qualifying purchases.

1. StarTech

#ad 1 Port USB to Serial RS232 Adapter, USB to DB9 Serial Adapter Cable, Prolific PL-2303, RS232 Serial Converter ICUSB232V2

StarTech #ad - Communicate efficiently with connected devices with high-speed 921Kbps support. Maximized portability: this usb to serial rs232 adapter converts a USB port into an RS232 DB9 serial port to connect to, monitor, and control a serial device.

Portable design: powered by a usb port, this usb to rS232 serial adapter cable features a lightweight design that conveniently fits into your carrying case, making it ideal for professionals on the go. Broad compatibility: compatible with your usb 1. 0 or 2. 0 ports, this usb to rs232 converter works with your Windows, Mac or Linux system. Portable and lightweight, the USB-Powered design requires no additional power adapter.

Compatible with windows 8, Mac OS X and Linux. Install in almost any laptop or desktop computer through broad operating system compatibility, including Windows 8. Usb-powered - no external power adapter required. Fast transfer speeds: experience fast speeds with this USB to DB9 serial adapter, supporting a Baud Rate up to 921. 6kbps. Compatible with USB 1. 1 or higher ports.
BrandStarTech #ad #ad
Height0.8 Inches
Length16.9 Inches
Weight0.09 Pounds
Width1.4 Inches
Part NumberICUSB232V2
Warranty3 Year

2. Monoprice


Monoprice PS/2 Keyboard/Mouse to USB Converter Adapter, Black 110934

Monoprice #ad - No software or special drivers are required. It is also useful in a kvm extender situation allowing PS/2 keyboards/mice TO be used with USB KVMs. This can be particularly useful if you have a specialty keyboard or mouse device and a PC without PS2 ports.
BrandMonoprice #ad
ManufacturerMonoprice #ad
Height0.7 Inches
Length4.8 Inches
Weight0.14 Pounds
Width7.1 Inches
Part Number110934
Warranty1 Year



Vista, Linux and Mac OS6ft…, 7, USB Serial Adapter with FTDI Chipset,USB 2.0 to Male DB9 Serial Cable for Windows 11,10, 8, OIKWAN USB to RS232, XP, 2000

OIKWAN #ad - Powered by usb port, this usb to db9 series RS232 adapter cable is designed to fit easily into your handbag. Usb 2. 0 to rs232 male db9 console cable will support 1Mbps date transfer rate. Wide range of applications: usb to rs232 db9 male serial adapter can work with your windows 10 / 8 / 8.

1 / vista / 7 / xp, such as serial modem with db9, pos, isdn terminal adapter, palm computer, barcode scanner, tax printer, CNC, label printer, PDA, label writer, MAC or Linux system and other platforms. Usb power supply - no external power supply required. Usb adapter is designed to connect to serial devices, cash register, bar code scanner, PLC controller, digital camera, etc.

Most convenient: rs232 to usb simple installation, plug and play, COM port creation, baud rate can be changed to the required settings. Exquisite design: usb-to-serial, gold plated usb rs232 connector and pvc cable ensure high performance and extra durability. High quality: ftdi usb serial, the latest ftdi chip set ensures more reliable and faster operation.
BrandOIKWAN #ad
ManufacturerOIKWAN #ad
Height6.7 Inches
Length8.3 Inches
Width0.66 Inches
Part NumberAQ-17
Warranty1 year warranty



DGZZI USB to PS2 Adapter 2pcs Green PS/2 Female to USB Male Converter Adapter for Mouse and Keyboard

DGZZI #ad - When your computer does not have many USB ports, a USB to PS/2 adapter can help you easily connect to the computer. This usb male to ps/2 female adapter can easily switch between PS/2 and USB interfaces, which is very practical.

This interface requires your device to be compatible with USB, and you need to ensure that your device has a chipset. Mouse usb interface to ps2 interface adapter, or usb interface mouse is unstable, suitable for: desktop or laptop USB interface is not enough, you can convert the mouse's own USB interface to PS2 interface for use, or save a USB port for the computer.

Please note: the ps/2 interface of the computer does not support hot plugging! Before using the computer, turn it off, then plug it in and turn it on again. The usb interface is only used to connect a computer mouse or keyboard, and cannot be connected to other devices. The product is of good quality and can be easily installed without a software driver.
BrandDGZZI #ad
ManufacturerDGZZI #ad
Weight0.02 Pounds
Part NumberAPS2FTUSBM-G2



SABRENT USB 2.0 to Serial 9 Pin DB 9 RS 232 Converter Cable, HEXNUTS, Prolific Chipset, Mac OS X 10.6 and Above 2.5 Feet CB-DB9P, Windows 11/10/8.1/8/7/VISTA/XP

SABRENT #ad - Com ports and baud rates can be modified to desired set up. Easy to setup: plug & play - simply plug your device into the adapter and the adapter into your PC or Mac. This product comes with LIFETIME manufacturer warranty. Supported os: windows 2000/me/98se, windows xp 32/64-bit, windows 7 32/64-bit, windows 10 and 11 32/64-bit, mac os x 10.6 and above, windows vista 32/64-bit, Windows 8/8. 1 32/64-bit, Linux 2. 4 or above. Provides the connection between USB and the traditional RS-232 serial port.
BrandSABRENT #ad
ManufacturerSabrent #ad
Height0.74 Inches
Length7.36 Inches
Weight0.2 Pounds
Width5.16 Inches
Part NumberCB-DB9P
Warranty1 Year limited

6. Gearmo


Supports Windows 11/10/8.1/8/7/, Gearmo USB to Serial RS-232 Adapter with LED Indicators, FTDI Chipset, Mac OS X 10.6 and Above

Gearmo #ad - Easy test - easy test rs-232 host to device link. Usb to rs232 serial – 5ft in length serial adapter. With a full leD, dual color display, tester output. Reach out to us for cad, providing Advanced Engineering, Mechanical Drawings and, Data Sheets.

Os compatibility: windows 7, 10, 8, and Windows 11 as well as Linux and MacOS 10. X. Supported os platforms are windows 7, 8, 10, and 11 as well as Linux and MacOS 10. X. Why gearmo? your trusted partner based in the usa, highly reliable and superior Built Products to handle the most demanding industries for over 20 years. Compatability - with support on multiple os platforms this makes our USB RS- 232 very versatile. Connect legacy db-9 serial communications devices to a modern computer with USB. This will make testing your connections with ease.
BrandGearmo #ad
ManufacturerGearmo #ad
Height0.6 Inches
Length5.5 Inches
Weight0.17 Pounds
Width3.5 Inches
Part NumberFTDI-LED

7. CableCreation


Vista, 2 Meters/Black, 7, XP, 6.6 Feet USB to DB9 Female Converter Cable for Windows 10, macOS, 8, Linux and Mac OS X, 8.1, CableCreation USB to RS232 Serial Adapter FTDI Chip

CableCreation #ad - Usb port with 1Mbps data transfer rate. Usb bus powered, no external power adapter required. Tinned copper conductor and triple shielding ensure the best data transfer rate. Latest prolific ftdi chipset. Note: it's usb to rs232 FEMALE adapter. Supports windows 10/8.

1/8/7/vista/xp//2000 /Linux 2. 4 or above, mac OS X 106 and above; drivers can be downloaded at cablecreation website. Easy connectivity: usb to rs232 adapter works with models, cnc, pos, bar code scanner, isdn terminal adapters, tax printer, label writers, PDAs, digital cameras, PLC controller, label printer, cashier register, and devices with DB9 serial ports. Please note that it’s not compatible with Cutting plotter, palm PCs Windows 10 / 8 / 7--should auto detect and install the drivers, SCM.

Gold plated usb 2. 0 male to rs232 female db9 serial cable connects a serial db9 9 pin device, such as a modem, to a USB port on your computer. Cablecreation offers 24 month product warranty and easy to reach lifetime customer services. This usb to rs232 adapter is a USB 2. 0 male to rs232 female db9 serial converter cable, suitable for customers with RS232 female head requirements with the same pin definition. If you have any problem with this item please do not hesitate to contact with us.
BrandCableCreation #ad
ManufacturerCableCreation #ad
Height0 Inches
Length0 Inches
Weight0.02 Pounds
Width0 Inches
Part NumberCD0486

8. StarTech


Din Rail, COM Port Retention, Wall Mount, FTDI USB to DB9 RS232 Hub ICUSB2324I, 4 Port USB to Serial RS232 Adapter

StarTech #ad - Com retention capabilities: for added convenience, this FTDI USB to DB9 RS232 hub features COM retention so COM port assignments are maintained during reboots.

Installation options: this usb serial adapter has integrated wall mount brackets and included DIN Rail clips for versatile mounting options. Plug and play installation: this dB9 serial converter is powered by an available USB port / cable so no external power adapter is required. Industrial strength: built to withstand harsh environments, this 4 port USB to serial RS232 adapter has a rugged all-metal enclosure for added durability in industrial settings.
BrandStarTech #ad #ad
Height1.97 Inches
Length7.01 Inches
Weight1.1 Pounds
Width5.91 Inches
Part NumberICUSB2324I
Warranty2 year warranty

9. Tripp Lite


Tripp Lite Keyspan High-Speed USB to Serial Adapter, PC & Mac, USB-A to DB9 RS232 Male, 3-Year Warranty USA-19HS, 3 Foot / 0.91 Meter Cable

Tripp Lite #ad - Db9 serial port supports data transfer rates up to 230 Kbps:twice the speed of a standard built-in serial port. Plug-and-play convenience:db9 serial port is seen as a COM port by your computer, and is available for use by any program that accesses COM ports. No need for an external power adapter:draws power directly from your computer via the USB connection. Led shows adapter status and data activity at a glance. Serial adapter allows a serial device to be connected to a USB computer.
BrandTripp Lite #ad
ManufacturerKeyspan #ad
Height2.75 Inches
Length9 Inches
Weight0.35 Pounds
Width5.8 Inches
Part NumberUSA-19HS
WarrantyComes with Manufacturer Warranty.

10. Syntech


Syntech USB C to USB Adapter Pack of 2 USB C Male to USB3 Female Adapter Compatible with MacBook Pro 2023 iMac iPad Mini 6/Pro MacBook Air 2022 and Other Type C or Thunderbolt 4/3 Devices Space Grey

Syntech #ad - Compatibility: this usb c to usb adapter is compatible with macBook Pro after 2016 and MacBook Air after 2018 and most of the laptops, tablets and smartphones with a USB Type C port.

Compact and easy to use: Plug and play, no driver required; Simple structure, lightweight and portability. Design: the adapter is gathered with zinc alloy metallic minimalist design and delicate embossment for not slipping. Connectors: engineered for enhanced durability, the male USB C and female USB3 connectors are designed to be plugged and unplugged up to 10000 times. User friendly and usb3 speed: plug and work; plug the usb c end of the adapter into a USBC port, and then connect your flash drive or other standard USB A devices; Also, you can sync or charge your phone with this USB C to USB adapter.
BrandSyntech #ad
ManufacturerSyntech #ad
Height0.32 Inches
Length1.08 Inches
Weight0.04 Pounds
Width0.65 Inches
Part NumberMARK3_SML
Warranty2 year