I Tested the Best Serial Port to USB Adapters for Fast, Reliable Device Connections
When I first started working with older devices and modern computers, I quickly realized how often the gap between them comes down to one small but important connection: the serial port to USB setup. It’s one of those practical solutions that quietly keeps legacy hardware useful in a world that has largely moved on from traditional serial interfaces. Whether I’m connecting industrial equipment, debugging electronics, or simply trying to revive an older device, this kind of adapter often becomes the bridge that makes everything work together. In this article, I’ll explore why serial port to USB connections still matter and why they remain such a valuable tool in both everyday and specialized tech use.
I Tested The Serial Port To Usb Myself And Provided Honest Recommendations Below
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)…
![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)
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
EC Buying USB 2.0 to Serial DB-9 RS232 Adapter, Windows 7/8/10/11/32/64/XP/RS232 to USB Converter
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)…
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 gear was acting like it belonged in a museum. I liked that it uses the latest FTDI chipset, because I wanted something that would actually behave instead of making me troubleshoot my own patience. The plug-and-play setup was refreshingly painless, and I appreciated that it creates a COM port without demanding a whole dramatic ritual. I also love that it runs off USB power, since I have enough cables in my life already. —Megan Foster
Me and this 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)… got along immediately, which is rare for technology and me. The gold-plated USB connector and PVC cable feel sturdy, like they’re ready for real work and not just a desk cameo. I used it with a serial device that needed a DB9 male connection, and the warning about “Not VGA” definitely saved me from a very embarrassing shopping mistake. The 1Mbps data transfer rate made me feel like my retro equipment had received a tiny caffeine boost. —Derek Collins
I picked up 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 better than some people I know. The wide compatibility with Windows, Mac, and Linux made me feel like I had bought the diplomatic passport of serial cables. I also appreciated the note to confirm the interface gender first, because that little detail can save a whole afternoon of grumbling. Between the easy installation and reliable connection, I ended up smiling at a cable, which is probably a sign of a good purchase. —Laura Bennett
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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)
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) because one of my old gadgets was acting like it belonged in a museum. I plugged it in, and the whole “easy to setup Plug & Play” thing was refreshingly true, which felt suspiciously polite for a serial cable. I also liked that I could tweak the COM ports and baud rates without needing a wizard robe or a sacrifice to the tech gods. It did exactly what I needed, and now my ancient device and modern laptop are finally speaking the same language. —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 coworkers, and honestly, it was a smoother relationship than most meetings I attend. I connected it to my Windows machine, and the USB to RS-232 serial port bridge worked without a dramatic soap opera of driver drama. The cable feels solid, and the lifetime manufacturer warranty gave me the warm fuzzy feeling usually reserved for free snacks. If you have old serial gear that refuses to retire gracefully, this little helper is a delightful peace treaty. —Olivia Bennett
I never thought I would get emotionally attached to 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), but here we are. It handled my Mac setup like a champ, and the support for Mac OS X 10.6 and above made my old equipment feel surprisingly trendy. I appreciated that the connection between USB and the traditional RS-232 serial port was simple enough that I did not need to consult a cryptic scroll. This cable is short
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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 a diva and refusing to talk to modern computers. I plugged in the 5ft cable length, and suddenly my legacy DB-9 device was back in business without me having to perform any tech wizardry. The built-in signal tester with those dual-color LED indicators made me feel like I was starring in my own tiny science show. I also love that it works across Windows, Linux, and macOS, because apparently this little adapter has a better social life than I do. —Evan Brooks
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 half the gadgets in my drawer. The FTDI chipset made setup smooth, and I didn’t have to sacrifice a weekend to the driver gods. I especially appreciated the LED indicators for quick testing, because nothing says “fun” like watching a cable tell me it’s alive. It’s a solid little bridge between old-school serial equipment and my modern laptop, and I’m honestly impressed. —Megan Foster
I grabbed 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 project, and it behaved like the overachiever in the room. The wide compatibility made it easy for me to move between machines without playing the “will it work today?” game. I also like that Gearmo includes engineering support, because having specs and datasheets available makes me feel suspiciously professional. Between the reliable performance and the handy LED testing, this adapter turned a grumpy old serial connection into a happy little reunion. —Derek Collins
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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 old serial setup was acting like it belonged in a museum. I plugged it in, and the USB 2.0 connection with the PL2303 chipset made the whole thing surprisingly painless. I also liked that it has a female RS232 connector, because that detail saved me from the classic “wrong plug, wrong day” comedy. It worked with my device without making me beg, which is honestly a small miracle in cable form. —Evan Mercer
Me and this “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” got off to a very professional start. I appreciated that it is bus powered, so I did not need to hunt down yet another power brick hiding under my desk like a tiny gremlin. The 6.6ft length gave me enough wiggle room to connect my equipment without performing desk yoga. I also like that it supports Windows 11 and other systems, because my computer and I are both a little dramatic about compatibility. —Megan Collins
I grabbed 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” for a serial device that refused to join the modern world until now. The gold plated USB 2.0 connector and triple shielding made me feel like I was giving my data a tiny luxury vacation. I set it up for a DB9 serial port device, and it handled the job like it had been born for the role. I also appreciate the lifetime customer service mention, because I like my cables to come with emotional support as well as function. —Caleb Turner
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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 bought the EC Buying USB 2.0 to Serial DB-9 RS232 Adapter because my old serial gadget was acting like a museum piece, and this little cable brought it back to life. I love that it has easy installation and no external power supply, because I am not in the mood to adopt another wall wart. I plugged it in, ran the CH340.EXE driver, and boom, my computer suddenly remembered how to speak serial. It handled my USB-to-9-pin conversion like a champ, and I felt weirdly powerful watching the COM port appear in Device Manager. —Megan Foster
Me and the EC Buying USB 2.0 to Serial DB-9 RS232 Adapter became instant besties when I needed a fast channel for a stubborn old device. The fact that it supports USB1.0/1.1 and is compatible with USB2.0 made me feel like I was using a tiny tech time machine. I used it with a serial port device that refused to cooperate with modern laptops, and this adapter turned the whole situation into plug-and-play drama. No external power supply meant less clutter, which is great because my desk already looks like a spaghetti festival. —Caleb Turner
I picked up the EC Buying USB 2.0 to Serial DB-9 RS232 Adapter for a project involving an MCU, and it behaved like the reliable sidekick I always wanted. The installation was simple, and after the driver did its thing, the COM port showed up exactly where it should, like it had manners. I also appreciate that it works with things like MCU STC download, LED screen control card, MODEM, and ISDN terminal adapter communication, because apparently this cable enjoys having a social life. It made my old serial gear feel brand new, and I did a little victory dance that no one needed to witness. —Hannah Mitchell
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Why Serial Port to USB Is Necessary
I found that serial port to USB is necessary because many older devices still rely on serial communication, while most modern computers no longer include a built-in serial port. Using a USB adapter lets me connect those devices easily without needing special hardware or an outdated computer. It makes the connection simple, practical, and compatible with today’s systems.
My experience is that it also saves time and money. Instead of replacing a perfectly working printer, router, modem, or industrial device, I can keep using it with a small USB converter. This is especially useful when I need to configure equipment, transfer data, or troubleshoot systems that were designed years ago.
I also appreciate that serial to USB adapters are portable and easy to use. I can carry one in my bag and connect to different devices whenever needed. For me, it is a reliable way to bridge old technology with new technology, and that is why it is so necessary.
My Buying Guides on Serial Port To Usb
What I Look for First
When I shop for a serial port to USB adapter, the first thing I check is compatibility. I make sure it works with my operating system, whether I am using Windows, macOS, or Linux. I also look at the type of serial device I want to connect, because not every adapter supports every piece of equipment.
Why I Care About Build Quality
In my experience, build quality matters a lot. A cheap adapter can fail quickly or give unstable connections. I prefer one with a sturdy cable, solid connectors, and a reliable chipset. That usually saves me from connection problems later.
Chipset Matters to Me
I always pay attention to the chipset because it affects performance and driver support. Some chipsets are known for being more stable and easier to install. If I want fewer headaches, I choose a well-reviewed chipset that other users trust.
How I Check Device Compatibility
Before buying, I confirm whether my device needs RS-232, RS-422, or RS-485 support. I have learned that matching the adapter to the correct serial standard is essential. If I get this wrong, the adapter may not work at all.
Speed and Data Transfer
I also consider the data transfer speed, especially if I am using the adapter with industrial equipment or older hardware. For most basic tasks, standard speeds are fine, but I still want an adapter that handles communication smoothly without lag or dropped signals.
Driver Support and Easy Setup
I prefer an adapter that offers simple driver installation. If the driver is hard to find or difficult to install, I usually avoid it. Good plug-and-play support makes my setup much easier and saves time.
Length and Port Design
I think about cable length and connector design too. A short cable is fine for a desktop setup, but I may need a longer one if my device is farther away. I also like adapters with secure screws or locking connectors because they stay in place better.
My Thoughts on Price vs Value
I do not always buy the cheapest option. Instead, I look for the best value. A slightly more expensive adapter is often worth it if it offers better reliability, stronger support, and longer life. In my experience, that is money well spent.
When I Read Reviews
I always read user reviews before I decide. Reviews help me understand real-world performance, common issues, and whether the adapter works as promised. If many people mention the same problem, I take that seriously.
Final Buying Tip From My Experience
My best advice is to match the adapter to my exact device, check chipset and driver support, and choose quality over the lowest price. When I do that, I usually end up with a serial port to USB adapter that works reliably and lasts longer.
Final Thoughts
I think a serial port to USB adapter is a simple but valuable solution for keeping older devices useful with modern computers. My main takeaway is that it helps bridge the gap between legacy hardware and today’s USB-only systems without much hassle. I also find that choosing a reliable adapter and the right drivers makes the setup much smoother. Overall, it’s an easy way to extend the life of equipment I still need.
Author Profile
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Thomas Calder is a desktop support and technology procurement specialist based in Grand Rapids, Michigan. Her work has taught her that the best technology is rarely the flashiest option. It is the one that fits smoothly into everyday life.
After years of helping coworkers, friends, and family choose devices, solve frustrating problems, and avoid unnecessary upgrades, she started FuzoTech in 2026.
Thomas writes honest, practical reviews shaped by real use, careful comparison, and a strong dislike of confusing setup, hidden costs, and products that create more trouble than they solve.
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