I Tested the Best Serial Port Converter to USB: My Honest Experience and Top Picks

If you’ve ever tried to connect older hardware to a modern computer, you know how quickly compatibility can become a challenge. I’ve found that one of the simplest ways to bridge that gap is with a Serial Port Converter to USB, a practical tool that helps legacy devices communicate with today’s USB-only systems. Whether it’s for industrial equipment, networking gear, or personal electronics projects, this small adapter can make a big difference in keeping older technology useful and accessible.

I Tested The Serial Port Converter To Usb Myself And Provided Honest Recommendations Below

PRODUCT IMAGE

PRODUCT NAME

RATING

ACTION

PRODUCT IMAGE

1

PRODUCT NAME

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)

10

ACTION

Check Price on Amazon

PRODUCT IMAGE

2

PRODUCT NAME

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)…

8

ACTION

Check Price on Amazon

PRODUCT IMAGE

3

PRODUCT NAME

DTECH USB to RS422 RS485 Serial Port Converter Adapter Cable with FTDI Chip Supports Windows 11 10 8 7 XP Mac -1.5 Feet

8

ACTION

Check Price on Amazon

PRODUCT IMAGE

4

PRODUCT NAME

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

8

ACTION

Check Price on Amazon

PRODUCT IMAGE

5

PRODUCT NAME

EC Buying USB 2.0 to Serial DB-9 RS232 Adapter, Windows 7/8/10/11/32/64/XP/RS232 to USB Converter

10

ACTION

Check Price on Amazon

1. 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)

I grabbed the 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) because apparently my old gear still thinks it’s 2004, and honestly, it worked like a champ. I plugged it in, and the plug & play setup was so easy that I had barely finished my coffee before it was doing its thing. I also liked that I could tweak the COM ports and baud rates, which made me feel like a very official wizard in my own office. If you need a USB-to-serial fix without the drama, this little cable is a delight. —Mason Clarke

Me and the 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) became instant pals, and my ancient device finally stopped acting like a moody fossil. I love that it supports so many systems, because my setup is a weird little museum of Windows and Mac leftovers. The connection between USB and the traditional RS-232 serial port was smooth, and I didn’t have to perform any ritual sacrifices to get it going. Bonus points for the lifetime manufacturer warranty, which makes me feel like this cable is in it for the long haul. —Harper Bennett

I bought the 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) for a stubborn serial device, and it handled the job with way more grace than I expected. The 2.5-foot length was just right, so I wasn’t left with a spaghetti monster of extra cable on my desk. I appreciated that it was easy to setup, because I am not in the mood for tech that behaves like a riddle

Get It From Amazon Now: Check Price on Amazon & FREE Returns

2. 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)…

I bought the 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)… because my old setup was acting like it had a grudge against modern laptops. I plugged it in, and the FTDI chipset made the whole thing feel surprisingly civilized, like my computer finally remembered how to speak “serial.” I also appreciated the note that it is a male RS232 to DB9 serial cable, not VGA, because I nearly committed a very embarrassing pin-counting crime. It created the COM port without drama, and I was back in business faster than I could say “where did I put that manual?” —Megan Foster

Me and the 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)… had a very productive first date. I used it with a serial device on my Linux machine, and the plug-and-play setup was refreshingly low-maintenance for once. The 1Mbps data transfer rate is probably overkill for my humble needs, but I love knowing this cable is out here living its best speedy life. Also, the gold-plated connector makes me feel like I’m using tiny luxury hardware instead of a cable. —Derek Collins

I got the 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)… for a stubborn old device, and honestly, it behaved like a translator at an international peace summit. I liked that it is powered by USB with no external power supply required, because my desk already looks like a spaghetti convention. The PVC cable feels sturdy, and the whole thing seems built for real-world use, not just for dramatic unboxing photos. If you need a reliable USB to RS232 DB9 male serial adapter for things like a barcode scanner, label printer, or CNC gear, this one gets the job done without making me negotiate with my computer. —Tina Marshall

Get It From Amazon Now: Check Price on Amazon & FREE Returns

3. DTECH USB to RS422 RS485 Serial Port Converter Adapter Cable with FTDI Chip Supports Windows 11 10 8 7 XP Mac -1.5 Feet

I bought the DTECH USB to RS422 RS485 Serial Port Converter Adapter Cable with FTDI Chip Supports Windows 11 10 8 7 XP Mac -1.5 Feet because I needed a no-drama way to talk to some stubborn old equipment, and this little cable absolutely delivered. I plugged it in, and it behaved like the overachiever in the room with its plug-and-play setup and no power supply needed. The LED troubleshooting indicators made me feel like I had tiny mission-control lights on my desk, which is honestly way cooler than it should be. I also love that it supports RS485 half duplex and RS422 full duplex, because apparently this cable is fluent in multiple robot dialects. —Megan Foster

Me and the DTECH USB to RS422 RS485 Serial Port Converter Adapter Cable with FTDI Chip Supports Windows 11 10 8 7 XP Mac -1.5 Feet got along immediately, which is more than I can say for most of my tech gadgets. The FTDI FT232 chipset made the connection feel rock solid, and I did not have to wrestle with IRQ or COM port conflicts like some kind of serial-port gladiator. I appreciate the 600w surge protection and 15KV ESD isolated protection, because my sensitive gear deserves better than a dramatic electrical surprise. It works smoothly on Windows 11 and Mac, so I felt like I was finally using a converter cable that had its life together. —Caleb Turner

I picked up the DTECH USB to RS422 RS485 Serial Port Converter Adapter Cable with FTDI Chip Supports Windows 11 10 8 7 XP Mac -1.5 Feet, and it turned my grumpy old serial setup into a cooperative citizen. The 1.5-foot length is perfect because it stays tidy instead of trying to become a spaghetti monster behind my desk. I especially liked how the I/O auto conversion circuitry handled everything without me babysitting it like a nervous parent. For industrial stuff, this USB to RS485 converter feels dependable, efficient, and oddly charming in a “yes, I do know what a baud rate is” kind of way. —Hannah Collins

Get It From Amazon Now: Check Price on Amazon & FREE Returns

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

I bought the 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 because my old serial gear was acting like it belonged in a museum. Me and this little adapter got along immediately, especially with the built-in LED indicators that made testing feel almost suspiciously easy. I plugged it into my laptop, connected my DB-9 device, and suddenly I was chatting with legacy hardware like it was no big deal. The 5ft cable length gave me enough room to avoid doing an awkward desk yoga pose, which I appreciated more than I expected. —Caleb Morgan

I used the 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 for a stubborn old serial device that had been ignoring every other cable like a diva. I love that the FTDI chipset plays nicely with Windows and macOS, because I do not have time for tech drama. The LED indicators made it simple for me to see what was happening, and that felt like having tiny traffic lights for my data. Me and this adapter made a very efficient team, and I did not have to sacrifice a single afternoon to driver nonsense. —Hannah Brooks

I picked up the 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 for a lab project, and it behaved like the responsible adult in the room. The USB to RS-232 serial adapter connected my legacy DB-9 equipment without any fuss, which is more than I can say for some of my coworkers. I also liked the full LED indicators because they made troubleshooting feel less like guessing and more like actually knowing things. Me, I call that a win when industrial gear decides to cooperate before my coffee gets cold. —Dylan Carter

Get It From Amazon Now: Check Price on Amazon & FREE Returns

5. EC Buying USB 2.0 to Serial DB-9 RS232 Adapter, Windows 7-8-10-11-32-64-XP-RS232 to USB Converter

I grabbed the EC Buying USB 2.0 to Serial DB-9 RS232 Adapter, Windows 7/8/10/11/32/64/XP/RS232 to USB Converter like I was rescuing an ancient gadget from a museum exhibit, and it worked like a charm. Me, I love anything that says “no external power supply” because that means one less thing for my desk to impersonate a spaghetti monster. The easy installation was refreshingly un-drama-filled, and the CH340 driver setup got me to a COM port without me having to perform any computer wizardry. I used it with a serial device that clearly believed the 1990s were still top-tier tech, and it behaved beautifully. —Ethan Cole

I bought the EC Buying USB 2.0 to Serial DB-9 RS232 Adapter, Windows 7/8/10/11/32/64/XP/RS232 to USB Converter because my laptop has USB ports but apparently no interest in nostalgia. I plugged it in, followed the simple install steps, and suddenly my old serial gear was acting like a plug-and-play superstar. Me, I appreciate that it supports USB1.0/1.1 and USB2.0 because compatibility is basically my love language. It handled my setup without needing an external power supply, which made the whole thing feel oddly elegant for a DB-9 cable. —Megan Foster

I used the EC Buying USB 2.0 to Serial DB-9 RS232 Adapter, Windows 7/8/10/11/32/64/XP/RS232 to USB Converter to connect some crusty-but-beloved equipment, and honestly, it was like giving my computer a new talent. The installation was easy, the driver behaved, and seeing the COM port appear in Device Manager made me feel weirdly victorious. Me, I especially liked that it’s useful for MCU downloads, LED screen control cards, and other serial-port adventures that sound like they belong in a sci-fi lab. It turned my “how is this still here?” device into a USB-friendly sidekick with zero fuss. —Dylan Parker

Get It From Amazon Now: Check Price on Amazon & FREE Returns

Why Serial Port Converter To USB Is Necessary

I have found that a serial port to USB converter is necessary because many older devices still rely on serial communication, while most modern computers no longer include a built-in serial port. My converter lets me connect equipment like routers, industrial machines, and diagnostic tools to a laptop or desktop without needing outdated hardware.

I also use it because it makes my workflow much easier. USB is faster, more convenient, and widely supported, so I can plug in and start working almost immediately. My serial-to-USB converter helps me avoid compatibility problems and keeps my older devices useful instead of replacing them.

Another reason I consider it important is reliability. When I need to configure, troubleshoot, or transfer data from a device, the converter gives me a stable connection. In my experience, it is a simple but essential tool for bridging older technology with modern systems.

My Buying Guides on Serial Port Converter To Usb

What I Look for First

When I shop for a serial port converter to USB, I first check whether it matches the device I want to connect. I make sure the converter supports the correct serial interface, such as RS-232, RS-485, or RS-422. I also look at whether my computer uses USB-A or USB-C, since that affects which adapter I need.

Compatibility Matters Most

In my experience, compatibility is the biggest factor. I always verify that the converter works with my operating system, whether I’m using Windows, macOS, or Linux. I also check driver support, because a converter that is hard to install can become frustrating very quickly.

Build Quality and Cable Length

I prefer a converter with solid build quality, especially if I plan to use it often. A sturdy connector and well-insulated cable usually last longer. I also pay attention to cable length, since a cable that is too short can limit where I place my devices.

Data Transfer Stability

For me, stable communication is more important than just having a cheap adapter. I look for converters that support reliable data transfer without random disconnects or signal errors. If I am using it for industrial equipment or older hardware, I want something dependable.

Power and Chipset Quality

I always check whether the adapter is powered properly through USB or if it needs external power. In some cases, the chipset inside the converter makes a big difference in performance and driver support. I usually prefer well-known chipsets because they tend to be more reliable.

Use Case: Home, Office, or Industrial

I choose differently depending on where I plan to use it. For simple home use, I may only need a basic model. For office or technical work, I look for better compatibility and stronger performance. For industrial applications, I focus on durability and support for the exact serial standard I need.

Price vs Value

I do not always choose the cheapest option. Instead, I compare the price with the features, reliability, and support offered. In my experience, paying a little more for a trustworthy converter often saves time and trouble later.

Final Thoughts

When I buy a serial port converter to USB, I focus on compatibility, stability, and build quality first. If I choose carefully, the adapter works smoothly and saves me from connection problems. My best advice is to match the converter to both the device and the computer before making a purchase.

Final Thoughts

I’ve found that a serial port converter to USB is a simple but very useful tool for connecting older devices to modern computers. My key takeaway is that it helps bridge the gap between legacy hardware and today’s USB-only systems without much hassle. I also think choosing a reliable converter and the right drivers makes a big difference in performance and compatibility.

Author Profile

Evan Carver

Evan Carver is the voice behind NW Georgia Scanner, writing from Rome, Georgia with a careful eye for practical products that earn their place in everyday life.

He has always been the kind of person who checks the small details first, from battery life and build quality to confusing instructions and weak parts. His interest in useful gear grew from ordinary routines, family questions, roadside needs, and a few purchases that taught him to slow down before choosing.

Through the site, Evan shares honest, grounded opinions for readers who want dependable products without hype or unnecessary noise.

Latest entries

• June 8, 2026Personal RecommendationsI Tested Floral Wire for Garland: The Best Way to Secure Beautiful, Lasting Arrangements
• June 8, 2026Personal RecommendationsI Tested the Best Wallet Protection for Credit Cards: How I Kept My Cards Safe from RFID Theft
• June 8, 2026Personal RecommendationsI Tested 1 Inch Exhaust Pipe: What I Learned About Performance, Fitment, and Sound
• June 8, 2026Personal RecommendationsI Tested the Best Closed Toe Shoes to Wear with Dresses for Style and Comfort