Best USB Serial Adapters – StackableAgent

What are the best USB serial adapters available? We offer a curated list of top-rated USB serial adapters that ensure reliable connections between older devices and modern computers.

USB serial adapters are essential tools for connecting older devices to modern computers. They bridge the gap between USB ports and serial interfaces, making it easy to use legacy equipment with newer systems. Whether you’re working with cash registers, CNC machines, or microcontrollers, these adapters ensure smooth communication.

They are plug-and-play, reliable, and compatible with Windows, Mac, and Linux. Many come with LED indicators or gold-plated connectors for durability and performance.

With top brands like OIKWAN, SABRENT, and TRIPP LITE, you’re guaranteed quality and ease of use. Dive in to find the perfect adapter for your needs and unlock seamless connectivity.

List of Top 10 USB Serial Adapters

Title	Best For	Price
OIKWAN USB to RS232, USB Serial Adapter with FTDI Chipset,USB 2.0 to Male DB9 Serial Cable for Windows 11,10, 8, 7, Vista, XP, 2000, Linux and Mac OS(6ft)…	This USB to RS232 adapter is perfect for anyone who needs to connect older serial devices to modern computers. It’s ideal for tech enthusiasts, IT professionals, or hobbyists working with CNC machines, barcode scanners, or POS systems.	View on Amazon (paid link)
SABRENT USB 2.0 to Serial (9 Pin) DB 9 RS 232 Converter Cable, Prolific Chipset, HEXNUTS, [Windows 11/10/8.1/8/7/VISTA/XP, Mac OS X 10.6 and Above] 2.5 Feet (CB-DB9P)	This SABRENT USB 2.0 to Serial Converter Cable is perfect for anyone who needs to connect older devices with RS-232 ports to modern computers. It’s easy to use, works with Windows, Mac, and Linux, and comes with a lifetime warranty.	View on Amazon (paid link)
TRIPP LITE Keyspan High-Speed USB to Serial Adapter, PC & Mac, USB-A to DB9 RS232 Male, 3 Foot / 0.91 Meter Cable, 3-Year Warranty (USA-19HS)	This USB to Serial Adapter is perfect for anyone who needs to connect older serial devices to a modern USB computer. It’s easy to use, fast, and works with both PC and Mac.	View on Amazon (paid link)
Gearmo USB to Serial RS-232 Adapter with LED Indicators, FTDI Chipset, Supports Windows 11/10/8.1/8/7, Mac OS X 10.6 and Above	This USB to Serial RS-232 Adapter is perfect for anyone who needs to connect old devices to modern computers. It’s great for industrial, lab, or point-of-sale use.	View on Amazon (paid link)
StarTech.com 17in (43cm) 1-Port USB to Serial Adapter Cable, USB-A to DB9 RS232 Adapter, Prolific Chipset – M/M	This product is perfect for professionals who need a reliable way to connect devices. It’s great for anyone using barcode scanners, receipt printers, or other equipment that requires a serial connection. The portable design makes it easy to carry, so you can use it anywhere.	View on Amazon (paid link)
CableCreation USB to RS232 Adapter with PL2303 Chipset, 6.6ft USB 2.0 Male to RS232 Female DB9 Serial Converter Cable for Cashier Register, Modem, Scanner, Digital Cameras, CNC,Black	This USB to RS232 adapter is perfect for anyone who needs to connect older devices like cash registers, modems, or scanners to a modern computer. It’s easy to use and works with Windows, Mac, and Linux.	View on Amazon (paid link)
DTECH USB to TTL Serial 3.3V Adapter Cable TX RX Signal 4 Pin 0.1 inch Pitch Female Socket PL2303 Prolific Chip Windows 10 8 7 XP Vista (6ft, Black)	This DTECH USB to TTL Serial Adapter is perfect for hobbyists and developers who work with electronics. It makes connecting devices with 3.3V logic easy and fast. You can use it for tasks like flashing firmware or debugging your projects. It’s also great for anyone needing a reliable way to connect to UART signals.	View on Amazon (paid link)
DSD TECH SH-U09C USB to TTL Serial Adapter with FTDI FT232RL Chip Compatible with Windows 11, 10, 7 and Mac OS	This USB to TTL adapter is perfect for anyone who needs to connect their computer to a board or MCU. It’s great for debugging or downloading, with fast speeds and easy compatibility with Windows and Mac.	View on Amazon (paid link)
OIKWAN USB to RS232 Adapter with FTDI Chipset, USB to RS232 Male DB9 Serial Converter for Cashier Register, Modem, Scanner, Industriual Machinery, CNC, Black	This USB to RS232 adapter is perfect for anyone who needs to connect older devices like cash registers, modems, scanners, or industrial machinery to a modern computer. It’s easy to use and works with Windows, Mac, and Linux.	View on Amazon (paid link)
HiLetgo CP2102 USB 2.0 to TTL Module Serial Converter Adapter Module USB to TTL Downloader with Jumper Wires	This product is perfect for makers, engineers, and students working with microcontrollers. It connects MCUs to computers easily using the CP2102 chipset for stable performance.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 USB Serial Adapters in this expert-reviewed guide, combining customer feedback and thorough analysis. Each adapter is handpicked for performance, features, and value, ensuring you find the perfect fit for your needs. Whether you prioritize reliability, compatibility, or ease of use, this guide has you covered. Dive in to find the best USB Serial Adapter that suits your setup and elevates your connectivity.

1. OIKWAN USB to RS232, USB Serial Adapter with FTDI Chipset,USB 2.0 to Male DB9 Serial Cable for Windows 11,10, 8, 7, Vista, XP, 2000, Linux and Mac OS(6ft)…

The OIKWAN USB to RS232 Adapter connects USB devices to serial devices. It uses a reliable FTDI chipset for fast performance. Works with Windows, Mac, and Linux.

This adapter is plug-and-play, making setup easy. It supports 1Mbps data transfer for smooth operation.

Its gold-plated connectors and PVC cable ensure durability. Compact design fits easily in your bag.

Pros	Cons
FTDI Chipset ensures fast, reliable performance for your devices. Plug-and-play convenience with no external power needed. Wide compatibility with Windows, Mac, Linux, and more systems. Gold-plated connectors and PVC cable for durability and high performance.	Not VGA, 9-pin only—check device compatibility before buying. Requires driver download—must install manually from official site. No external power—may limit use with high-power devices.

Perfect For:

This USB to RS232 adapter is perfect for anyone who needs to connect older serial devices to modern computers. It’s ideal for tech enthusiasts, IT professionals, or hobbyists working with CNC machines, barcode scanners, or POS systems.

Ready to Purchase?

View Price on Amazon (paid link)

Best Usb To Ttl Adapters

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

The SABRENT USB 2.0 to Serial Converter Cable is a handy tool that bridges the gap between modern USB ports and traditional RS-232 serial ports. It’s perfect for connecting older devices to newer computers.

This cable works with many operating systems, including Windows, Mac, and Linux. It’s easy to set up with plug-and-play convenience. You can adjust COM ports and Baud rates to fit your needs.

It comes with a lifetime warranty, so you’re covered for good. The Prolific Chipset ensures reliable performance. Its 2.5-foot length offers flexibility without clutter.

Pros	Cons
Connects USB to RS-232 ports easily and quickly. Works with Windows, Mac, and Linux for wide compatibility. Plug & Play setup—no drivers needed, just plug in. Lifetime warranty ensures long-lasting reliability.	No USB-C option, limiting use with newer devices. Short 2.5-foot cable may restrict setup flexibility. No LED indicators for connection status.

Perfect For:

This SABRENT USB 2.0 to Serial Converter Cable is perfect for anyone who needs to connect older devices with RS-232 ports to modern computers. It’s easy to use, works with Windows, Mac, and Linux, and comes with a lifetime warranty.

Ready to Purchase?

View Price on Amazon (paid link)

3. TRIPP LITE Keyspan High-Speed USB to Serial Adapter, PC & Mac, USB-A to DB9 RS232 Male, 3 Foot / 0.91 Meter Cable, 3-Year Warranty (USA-19HS)

The TRIPP LITE Keyspan USB to Serial Adapter connects serial devices to USB computers. It works with both PCs and Macs. The 3-foot cable is just the right length for most setups.

It’s plug and play, so no extra drivers are needed. The DB9 port acts like a COM port on your computer. It draws power from the USB, so no extra adapter is required.

The adapter supports speeds up to 230 Kbps, which is twice as fast as standard ports. An LED light shows when it’s active. It comes with a 3-year warranty for peace of mind.

Pros	Cons
Connects serial devices to USB computers easily. Plug-and-play setup, no hassle required. Powered directly by your USB port, no extra adapter needed. Faster data transfer, up to 230 Kbps. LED indicator shows status and activity at a glance.	Limited to 230 Kbps data transfer rate, may not suit high-speed needs. No external power option, relies solely on USB connection. Short 3-foot cable, restricts device placement flexibility.

Perfect For:

This USB to Serial Adapter is perfect for anyone who needs to connect older serial devices to a modern USB computer. It’s easy to use, fast, and works with both PC and Mac.

Ready to Purchase?

View Price on Amazon (paid link)

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

The Gearmo USB to Serial RS-232 Adapter lets you connect old devices to modern computers. It has a 5-foot cable for easy use.

It has LED indicators for quick testing. Works with Windows, Mac, and Linux. FTDI Chipset ensures reliable performance.

Gearmo is a trusted USA brand. Offers engineering support for projects. 10+ years of industry experience.

Pros	Cons
Connects old serial devices to modern USB computers easily. LED indicators for quick, easy testing of connections. Works with Windows, Mac, Linux—wide compatibility. Trusted USA brand, 10+ years of reliable engineering.	No USB-C option, limiting use with newer devices. LEDs may distract in low-light environments. 5ft cable might be too short for some setups.

Perfect For:

This USB to Serial RS-232 Adapter is perfect for anyone who needs to connect old devices to modern computers. It’s great for industrial, lab, or point-of-sale use.

Ready to Purchase?

View Price on Amazon (paid link)

5. StarTech.com 17in (43cm) 1-Port USB to Serial Adapter Cable, USB-A to DB9 RS232 Adapter, Prolific Chipset – M/M

Connect easily with the StarTech.com USB to Serial Adapter Cable. It turns a USB port into an RS232 DB9 serial port. Works with many devices like scanners and printers.

This adapter is lightweight and portable. It fits in your bag, perfect for professionals on the go. Works with Windows, macOS, and Linux.

Backed by a 3-year warranty and free lifetime support. It’s the IT pro’s choice for reliable performance.

Pros	Cons
Converts USB to RS232 for easy device connections. Works with Windows, macOS, Linux for broad compatibility. Lightweight and portable, perfect for professionals on the go. Prolific chipset ensures reliable, high-speed performance.	No USB-C support, limiting use with newer devices. Short cable length (17in) may restrict setup flexibility. No driverless installation, requires manual setup.

Perfect For:

This product is perfect for professionals who need a reliable way to connect devices. It’s great for anyone using barcode scanners, receipt printers, or other equipment that requires a serial connection. The portable design makes it easy to carry, so you can use it anywhere.

Ready to Purchase?

View Price on Amazon (paid link)

6. CableCreation USB to RS232 Adapter with PL2303 Chipset, 6.6ft USB 2.0 Male to RS232 Female DB9 Serial Converter Cable for Cashier Register, Modem, Scanner, Digital Cameras, CNC,Black

CableCreation USB to RS232 Adapter with PL2303 Chipset, 6.6ft USB 2.0 Male to RS232 Female DB9 Serial Converter Cable for Cashier Register, Modem, Scanner, Digital Cameras, CNC,Black

Connect old devices to new computers with the CableCreation USB to RS232 Adapter. This 6.6ft cable lets you link serial devices like modems, scanners, and cameras to your computer’s USB port. It’s plug-and-play for easy setup.

Works with many systems, including Windows, Mac, and Linux. No external power needed. Just connect and go.

Built to last with tinned copper and triple shielding. Enjoy reliable data transfer and a 24-month warranty for peace of mind.

Pros	Cons
Connects USB to RS232 devices with gold-plated reliability. Latest PL2303 chipset ensures wide compatibility with Windows, Mac, Linux. Triple shielding and tinned copper for fast, stable data transfer. 24-month warranty and lifetime customer support for peace of mind.	Not compatible with all devices, like Cutting plotters or SCM. Female RS232 connector may not fit male-to-male setups. Drivers required for some systems, adding an extra step.

Perfect For:

This USB to RS232 adapter is perfect for anyone who needs to connect older devices like cash registers, modems, or scanners to a modern computer. It’s easy to use and works with Windows, Mac, and Linux.

Ready to Purchase?

View Price on Amazon (paid link)

7. DTECH USB to TTL Serial 3.3V Adapter Cable TX RX Signal 4 Pin 0.1 inch Pitch Female Socket PL2303 Prolific Chip Windows 10 8 7 XP Vista (6ft, Black)

The DTECH USB to TTL Serial Adapter is a handy tool for connecting devices to your computer. It has a 6-foot cable with a 4-pin female socket, making it easy to link up. This adapter is perfect for 3.3V logic level UART signals.

It uses a genuine PL2303TA chip for reliable data transfer. The Prolific chipset allows for customizable UART signals. This makes it a versatile choice for various projects.

This USB to TTL converter is compatible with multiple Windows versions. It’s an ideal debug cord for tasks like firmware flashing and router configuration. A great addition to any tech toolkit.

Pros	Cons
Connects devices to laptops via USB port easily. Reliable data transfer with genuine PL2303TA chip. Compatible with Windows 10, 8, 7, XP, Vista. Configurable EEPROM for customized UART signals.	No macOS or Linux support, limiting cross-platform use. Fixed 6ft length may be too long or short for some setups. No LED indicators for quick signal or power status checks.

Perfect For:

This DTECH USB to TTL Serial Adapter is perfect for hobbyists and developers who work with electronics. It makes connecting devices with 3.3V logic easy and fast. You can use it for tasks like flashing firmware or debugging your projects. It’s also great for anyone needing a reliable way to connect to UART signals.

Ready to Purchase?

View Price on Amazon (paid link)

8. DSD TECH SH-U09C USB to TTL Serial Adapter with FTDI FT232RL Chip Compatible with Windows 11, 10, 7 and Mac OS

The DSD TECH SH-U09C USB to TTL Serial Adapter lets you connect your computer to boards or MCUs easily. It uses a reliable FT232RL chip from FTDI for stable performance.

It works with Windows 11, 10, 7, and Mac OS. Supports 3.3V and 5V outputs. Comes with a 12-month warranty.

Pros	Cons
High-speed data transfer up to 900K for fast communication. FTDI FT232RL chip ensures stable, reliable performance. LED indicators for easy debugging and monitoring. Compatible with Windows, Mac, and more for wide usability.	No Linux support, limiting use for some developers. No USB-C port, requires adapter for modern devices. No driver CD included, must download online.

Perfect For:

This USB to TTL adapter is perfect for anyone who needs to connect their computer to a board or MCU. It’s great for debugging or downloading, with fast speeds and easy compatibility with Windows and Mac.

Ready to Purchase?

View Price on Amazon (paid link)

9. OIKWAN USB to RS232 Adapter with FTDI Chipset, USB to RS232 Male DB9 Serial Converter for Cashier Register, Modem, Scanner, Industriual Machinery, CNC, Black

OIKWAN USB to RS232 Adapter with FTDI Chipset, USB to RS232 Male DB9 Serial Converter for Cashier Register, Modem, Scanner, Industriual Machinery, CNC, Black

The OIKWAN USB to RS232 Adapter connects your computer to devices with a 9-pin female RS232 interface. It uses a reliable FTDI chipset for smooth communication.

Works with Windows, Mac, and Linux. Supports devices like cash registers, modems, and CNC machines. Gold-plated connectors ensure a strong, clear connection.

Easy to set up—just download the driver from the FT232 website. Active pins (2, 3, 5) handle data and power. Compact and durable design for daily use.

Pros	Cons
Connects serial devices to modern USB ports easily. Reliable FTDI chipset ensures stable communication. Wide compatibility with Windows, Mac, and Linux systems. Durable design with gold-plated connectors for longevity.	Not VGA, 9-pin only – Check device compatibility before buying. Driver required – Must download and install before use. Male connector – Ensure your device has female port to fit.

Perfect For:

This USB to RS232 adapter is perfect for anyone who needs to connect older devices like cash registers, modems, scanners, or industrial machinery to a modern computer. It’s easy to use and works with Windows, Mac, and Linux.

Ready to Purchase?

View Price on Amazon (paid link)

10. HiLetgo CP2102 USB 2.0 to TTL Module Serial Converter Adapter Module USB to TTL Downloader with Jumper Wires

The HiLetgo CP2102 USB 2.0 to TTL Module is a handy tool for connecting devices. It uses a stable and reliable chipset. This module makes it easy to link your computer to microcontrollers.

It supports fast baud rates from 300 bps to 1.5 Mbps. The module works with Windows, Mac, and Linux systems.

With standard USB and TTL connectors, it’s simple to use. The package includes jumper wires for quick setup. This adapter is perfect for downloading and debugging projects.

Pros	Cons
Stable CP2102 chipset ensures reliable connections. Wide baud rates (300 bps to 1.5 Mbps) for flexible use. Easy MCU-to-computer connection with standard USB and TTL ports. Broad OS support for Windows, Mac, and Linux systems.	No USB-C support, only USB-A. Limited baud rates compared to higher-end modules. No LED indicators for easy status checks.

Perfect For:

This product is perfect for makers, engineers, and students working with microcontrollers. It connects MCUs to computers easily using the CP2102 chipset for stable performance.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

When buying a USB serial adapter, consider these factors:

Compatibility: Ensure the adapter works with your operating system (Windows, Mac, Linux) and the devices you want to connect.
Chipset: Look for reliable chipsets like FTDI, Prolific, or PL2303 for stable performance.
Cable Length: Choose a length that suits your setup, from 2.5 feet for compact spaces to 6.6 feet for more flexibility.
Plug-and-Play: Opt for adapters that are easy to set up without needing extra drivers.
Durability: Check for gold-plated connectors and high-quality materials like tinned copper for long-lasting use.
Speed: Consider the data transfer speed (e.g., 1Mbps or 230 Kbps) to match your needs.
Warranty: Look for adapters with warranties (e.g., lifetime, 3-year, or 24-month) for added peace of mind.
LED Indicators: Adapters with LEDs can help with quick testing and troubleshooting.
Brand Reputation: Choose trusted brands like OIKWAN, SABRENT, or TRIPP LITE for quality and reliability.

With these factors in mind, you’ll find the perfect USB serial adapter to unlock seamless connectivity for your devices.