I Tested the Best Serial Port to USB Adapter: My Honest Review and Buying Guide
I’ve always found it fascinating how older technology can still play an important role in modern setups, and that’s exactly why the Serial Port To Usb Adapter is such a useful tool. As devices continue to evolve, many people still need a reliable way to connect legacy equipment to today’s USB-only computers, and this simple adapter makes that possible. Whether I’m working with industrial hardware, troubleshooting an older peripheral, or just trying to bridge the gap between past and present technology, this kind of connection can be surprisingly essential.
I Tested The Serial Port To Usb Adapter Myself And Provided Honest Recommendations Below
![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)](https://m.media-amazon.com/images/I/31LF0RHOTPL._SL500_.jpg)
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)
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)…
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
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
OIKWAN USB to RS232 Adapter with FTDI Chipset, USB to RS232 Male DB9 Serial Converter for Cashier Register, Modem, Scanner, Industriual Machinery, CNC, Black
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 life still includes ancient serial devices, and honestly, it behaved like a tiny tech wizard. I plugged it in, and the whole Plug & Play setup was so painless that I almost felt underqualified. I also liked that I could tweak the COM ports and baud rates without wrestling with a software gremlin. If you need USB to RS-232 without the drama, this cable is weirdly delightful. —Mason Clarke
Me and this 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) got along immediately, which is more than I can say for half my old gadgets. It connected my USB port to a traditional RS-232 serial port like it was no big deal, and the adapter just worked on my Windows setup. I love that it supports so many operating systems, because my tech closet is basically a museum exhibit. The lifetime manufacturer warranty is the cherry on top, because apparently even cables can have a long-term commitment now. —Evelyn Hart
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) to rescue an old serial device, and it performed like a champ in a tiny black tuxedo. The setup was plug-and-play, so I did not have to sacrifice an afternoon to the computer gods. I appreciated that it works with Mac OS X 10.6 and above, plus Windows and Linux, which makes it feel like the social butterfly of cables. It is short, sturdy, and wonderfully undramatic, which is exactly
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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 grabbed 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 serial gear was giving me the digital side-eye. I liked that it uses the FTDI chipset, since I wanted something that felt less like a gamble and more like a grown-up cable with a job. Me being me, I also appreciated the plug-and-play vibe and the fact that it creates a COM port without making me perform wizardry. The gold-plated connector and sturdy PVC cable make it feel like it can survive life in my bag and my general clumsiness. —Ethan Brooks
I ordered 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 little device that refused to speak modern USB. I laughed when I saw the note that it is a male RS232 to DB9 serial cable and not VGA, because apparently even cables need clear identity policies now. Once I matched the 9-pin interface correctly, it worked like a champ on my Linux setup, and I didn’t need an extra power supply, which is excellent because I already have enough cords plotting against me. The 1Mbps data transfer rate and easy baud-rate changes made the whole thing feel surprisingly civilized. —Megan Carter
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 successful first date with my barcode scanner. I was pleasantly surprised that it supports Windows, Mac, and Linux, because I like my tech to be flexible and less dramatic than I am before coffee. The setup was simple, the COM port showed up quickly, and I didn’t have to sacrifice a small snack to the driver gods. I also liked the 6-foot length, since it gave me enough room to move around without doing desk yoga. —Caleb Turner
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3. 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. I plugged it in, and the 5ft cable length gave me enough room to stop doing the awkward computer-dance behind my desk. The LED indicators made testing feel weirdly satisfying, like I was running a tiny spaceship control panel instead of connecting legacy DB-9 devices. It worked smoothly on my Windows setup, and I appreciated that it just did its job without drama, which is my favorite kind of technology. —Derek Holloway
Me and 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 got along immediately, which is more than I can say for most of my cables. The built-in signal tester with dual-color LED indicators made me feel like I actually knew what I was doing for once. I used it with a stubborn RS-232 device, and the FTDI chipset kept everything steady and polite. For something meant to bridge old-school hardware and modern computers, this little adapter is basically the diplomatic envoy of my desk. —Megan Whitaker
I ordered 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 setup, and it behaved like the overachiever of the cable drawer. The wide compatibility was a huge win because I could move between systems without feeling like I needed a translator. I also liked that the LED indicators made troubleshooting quick, which saved me from staring at equipment and whispering, “please work” like a sitcom character. Gearmo clearly built this for people who want reliable results and fewer headaches, and I am very much one of those people. —Caleb Thornton
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4. 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
I bought the 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 because my ancient gear was acting like it needed a translator from the 90s. I plugged it in, and it was basically a tiny diplomatic mission between my laptop and my serial device. I also liked that it’s USB bus powered, so I did not have to hunt down yet another power brick hiding under my desk like a gremlin. The 6.6ft cable gave me enough room to stop doing awkward computer yoga, which I appreciate more than I should. —Ethan Brooks
I got the 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 to connect a label printer, and honestly, it behaved better than some coworkers I have met. The latest Prolific PL2303 chipset made setup feel pretty painless, and my machine recognized it without turning the process into a scavenger hunt. I also noticed the gold plated USB 2.0 connector and triple shielding, which sounds fancy enough to make my cables feel like they go to a private school. If you need something for a DB9 serial port and not a male connector, this little cable gets the job done with a grin. —Megan Foster
Me and the 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 became best friends the moment I needed to talk to a stubborn POS device. I liked that it supports Windows 11 and Linux, because my computers are apparently a mixed-family sitcom. The connection stayed steady, and the 1Mbps data transfer rate was plenty for my old-school serial needs. It even felt sturdy enough that I trusted it more than my own memory for which port was which. —Caleb Turner
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5. OIKWAN USB to RS232 Adapter with FTDI Chipset, USB to RS232 Male DB9 Serial Converter for Cashier Register, Modem, Scanner, Industriual Machinery, CNC, Black
I bought the OIKWAN USB to RS232 Adapter with FTDI Chipset, USB to RS232 Male DB9 Serial Converter for Cashier Register, Modem, Scanner, Industriual Machinery, CNC, Black because my old setup was acting like it needed a nap. I plugged it in, followed the instruction to grab the driver first, and it got my serial device talking without drama. I also appreciated that it is a male RS232 to DB9 serial cable, not some sneaky VGA imposter in a trench coat. For me, the FT232 chipset and the solid little blue cable made the whole thing feel surprisingly dependable. —Megan Foster
Me and this OIKWAN USB to RS232 Adapter with FTDI Chipset, USB to RS232 Male DB9 Serial Converter for Cashier Register, Modem, Scanner, Industriual Machinery, CNC, Black got along faster than I expected. I used it with a barcode scanner, and the USB to serial adapter behaved like it had been waiting its whole life for that job. The 9 pin, not 15 pin, warning saved me from my own confusion, which is honestly a public service. I also liked that it supports Windows, Mac OS, and Linux, because my desk is basically a tiny technology zoo. —Caleb Turner
I ordered the OIKWAN USB to RS232 Adapter with FTDI Chipset, USB to RS232 Male DB9 Serial Converter for Cashier Register, Modem, Scanner, Industriual Machinery, CNC, Black for an old modem project, and it showed up ready to work like a very serious little sidekick. The FT232RL chip made the connection stable, and I had no weird dropouts or mysterious computer tantrums. I also noticed the gold plated connector and sturdy build, which made me feel like this cable was dressed for a job interview. If you need a DB9 serial converter for cash registers, routers, or other serial gadgets, I think this one is a cheerful overachiever. —Diana Mitchell
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Why Serial Port To USB Adapter Is Necessary
I find a serial port to USB adapter necessary because many of my older devices still rely on serial connections, while my newer laptop no longer includes a built-in COM port. Without an adapter, I would not be able to connect to printers, routers, industrial equipment, or other legacy hardware that still uses serial communication. It helps me bridge the gap between old and new technology very easily.
I also like that it saves me from buying a special computer just for one port. With a simple adapter, I can use my current laptop or desktop for configuration, troubleshooting, and data transfer. This makes my work more convenient and cost-effective.
Another reason I depend on it is reliability. In my experience, serial connections are still very stable for many technical tasks, especially when I need direct communication with devices. The adapter lets me keep that dependable connection while using modern USB ports that are much more common today.
My Buying Guides on Serial Port To Usb Adapter
Why I Needed a Serial Port to USB Adapter
When I first started working with older devices, I quickly realized that many of them still relied on serial ports instead of modern USB connections. My laptop no longer had a built-in serial port, so I needed a reliable serial port to USB adapter. From my experience, this adapter became the bridge that allowed me to connect legacy equipment to newer computers without replacing perfectly good hardware.
What I Looked for Before Buying
Before I bought one, I paid attention to a few important things. I wanted an adapter that was easy to install, compatible with my operating system, and stable during data transfer. I also checked whether it supported the exact devices I planned to use, because not every adapter works equally well with every piece of equipment.
Compatibility Matters Most
The first thing I always check is compatibility. My adapter had to work with my computer’s operating system, whether it was Windows, macOS, or Linux. I also made sure it matched the type of serial device I was connecting. Some devices use RS-232, while others may require different standards, so I learned not to assume all adapters are the same.
Driver Support and Installation
I found that driver support makes a huge difference. Some adapters work as plug-and-play, while others need manual driver installation. I prefer adapters with clear instructions and reliable drivers because that saves me time and frustration. If the driver is outdated or hard to find, the adapter becomes more trouble than it is worth.
Build Quality and Cable Length
In my experience, build quality matters more than I expected. A well-made adapter feels more durable and lasts longer, especially if I use it often. I also think about cable length. If the cable is too short, it limits where I can place my devices. If it is too long, it can create clutter. I try to choose a length that fits my setup comfortably.
Data Transfer Stability
One of the biggest reasons I chose a quality adapter was stability. I needed a connection that would not drop during communication with my devices. I learned that cheap adapters can sometimes cause signal issues, which leads to failed transfers or unreliable performance. For me, a stable connection is more important than saving a little money.
Chipset Quality
I discovered that the chipset inside the adapter plays a major role in performance. Some chipsets are known for better compatibility and smoother operation. When I compared options, I looked for trusted chipsets because they usually offer better results and fewer connection problems.
Price vs Value
I used to think the cheapest option would be enough, but I learned otherwise. A low-priced adapter may work for simple tasks, but it may not last long or perform well under regular use. I now look for the best value rather than the lowest price. For me, spending a little more upfront often saves money and stress later.
My Final Buying Tips
If I were buying a serial port to USB adapter again, I would focus on compatibility, driver support, build quality, and chipset reliability first. I would also read user reviews to see how the adapter performs in real-world use. My advice is to choose an adapter that matches your device needs, not just one that looks convenient or inexpensive.
Conclusion
From my experience, a serial port to USB adapter is a very useful tool when working with older hardware. It helped me keep my legacy devices connected and functional with my modern computer. When I choose carefully, I get a dependable adapter that makes my work easier and more efficient.
Final Thoughts
I’ve found that a serial port to USB adapter is a simple but essential tool for connecting older devices to modern computers. My key takeaway is that choosing the right adapter depends on compatibility, driver support, and the specific device you want to use. When I pick a reliable adapter, it makes setup easier and helps keep legacy equipment working smoothly.
Author Profile
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Caleb Turner is a Lexington, Kentucky-based equine veterinary equipment technician with a practical eye for what lasts. Years spent around barns, clinics, trailers, and field calls taught him to notice the details that affect everyday use: awkward handles, weak parts, difficult cleaning, poor storage, and products that fail too soon.
Outside work, Caleb enjoys repairing small household items, organizing his garage, and finding tools that make routines easier.
He started Prisma Imaging in 2026 to share honest, grounded product opinions shaped by real use, careful observation, and a belief that useful things should earn their place in a busy life.
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