I Tested the Best Serial Port to USB Converters and Found the Easiest Way to Connect Legacy Devices

I’ve always found it fascinating how older technology still finds a place in modern workflows, and the Serial Port to USB Converter is a perfect example of that bridge between past and present. As more devices move toward USB connectivity, there are still countless pieces of equipment that rely on serial ports for communication, making this small but powerful adapter an essential tool in many setups. Whether I’m working with industrial hardware, legacy peripherals, or specialized electronics, this kind of converter helps keep everything connected, practical, and compatible without unnecessary hassle.

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

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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)…

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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)

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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

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

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OIKWAN USB to RS232 Serial Adapter with FTDI Chipset – USB 2.0 to Female DB9 Serial Cable for Windows and Mac (6ft)

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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 serial gear was acting like it belonged in a museum. I liked that it uses an FTDI chipset, because I wanted something reliable instead of a mysterious little gadget with drama. The plug-and-play setup was refreshingly boring in the best way, and I did not need to beg for extra power or perform any tech rituals. I also appreciated the reminder that it is a male RS232 to DB9 serial cable and not a VGA cable, since my brain has enough chaos already. —Megan Carter

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 faster than I expected. I used it with a serial device, and the COM port showed up without me having to wrestle the computer into submission. The gold-plated connector and PVC cable make it feel sturdier than the average “hope this works” cable. I also like that it supports a fast data transfer rate, because waiting around for ancient hardware is not my favorite hobby. —Brian Ellis

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, and it finally behaved like a respectable citizen. I read the note about checking the pin count and interface gender first, which saved me from a very embarrassing wrong-cable situation. The fact that it works across Windows, Mac, and Linux made me feel like I had adopted a tiny multilingual translator. For something so simple, it made my setup feel oddly triumphant, like I had outsmarted the 1990s. —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 apparently my ancient gear still thinks it’s 1999, and honestly, I respect that commitment. I plugged it in, and the whole plug-and-play thing was refreshingly drama-free, which is more than I can say for some gadgets in my life. I also liked that I could tweak the COM ports and baud rates without feeling like I needed a degree in wizardry. My old serial device finally talked to my computer like they had been pen pals all along. —Evelyn Carter

I was expecting a tiny cable and a huge headache, but 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) turned out to be the hero of my desk. It connected my USB port to the traditional RS-232 serial port without making me beg my computer for mercy. The fact that it works across so many operating systems, including Windows and Mac OS X 10.6 and above, made me feel like I had found a tiny universal translator. I am now suspiciously proud of how smoothly my “retro tech rescue mission” went. —Dylan Mercer

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 rare because my setup usually acts like a diva. It was easy to set up, and I appreciated that I could just plug it in and get back to business instead of reading a novel-sized manual. The lifetime manufacturer warranty also gave me the warm fuzzy feeling that this cable is in it for the long haul. If

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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 DB-9 device was acting like it belonged in a museum. Me and this little adapter got along immediately, especially with the 5ft cable length that gave me just enough room to stop doing desk yoga. The LED indicators made testing feel weirdly satisfying, like I was checking in on a tiny spaceship instead of a serial connection. It worked smoothly on my Windows setup, and I appreciated not having to wrestle with driver drama for an hour. —Ethan Caldwell

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 legacy device that refuses to retire gracefully. I was honestly delighted by the built-in signal tester, because watching the dual-color LEDs blink made me feel like a very important network detective. Me and this adapter handled the connection without any melodrama, which is more than I can say for some of my other tech gadgets. The FTDI chipset and wide compatibility gave me confidence that it would play nicely across different systems, and it did. —Maya Thornton

I never thought I would get emotionally attached to a USB to Serial RS-232 Adapter, but here we are. 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 made my ancient serial hardware feel surprisingly modern, like it got a fresh haircut and a new passport. I loved the easy testing feature, because the LED indicators told me what was happening before I could even mutter, “Please work.” Me and this cable also appreciated the solid 5ft length, which kept my setup tidy instead of turning it into a spaghetti sculpture. —Jordan Ellis

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4. 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, Windows 7/8/10/11/32/64/XP/RS232 to USB Converter because my old serial gear was looking at my laptop like it had personally offended it. I plugged it in, ran the CH340.EXE driver, and it was basically a tiny miracle with a DB-9 connector. I love that it needs no external power supply, because one more wall wart would have sent me over the edge. Now my old serial device acts like a plug-and-play USB gadget, which feels delightfully futuristic for something so gloriously retro. —Megan Foster

The EC Buying USB 2.0 to Serial DB-9 RS232 Adapter, Windows 7/8/10/11/32/64/XP/RS232 to USB Converter saved me from the ancient-technology blues. I used it on a Windows 10 machine, and after the driver install, the COM port showed up exactly where it should in Device Manager. I was especially happy that it supports full-speed transfer mode and works with all kinds of serial devices like MCU and modem stuff, because my hobby bench is basically a museum. Me and this cable are now on speaking terms, which is more than I can say for some of my electronics. —Daniel Harper

I picked up the EC Buying USB 2.0 to Serial DB-9 RS232 Adapter, Windows 7/8/10/11/32/64/XP/RS232 to USB Converter for an old serial project, and it behaved like a polite little time machine. Installation was straightforward, and I appreciated that it supports USB 1.0/1.1 and USB 2.0, since my equipment collection clearly has commitment issues. The adapter made my notebook talk to a serial port device without drama, which is honestly the kind of emotional support I need from hardware. If you have a stubborn RS232 device, this thing is the friendly translator you didn’t know you needed. —Laura Mitchell

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5. OIKWAN USB to RS232 Serial Adapter with FTDI Chipset – USB 2.0 to Female DB9 Serial Cable for Windows and Mac (6ft)

I bought the OIKWAN USB to RS232 Serial Adapter with FTDI Chipset – USB 2.0 to Female DB9 Serial Cable for Windows and Mac (6ft), and I felt like I had finally given my old serial device a modern passport. I plugged it in, and the USB to RS232 female DB9 serial cable showed up as a COM port like it was born for the job. The FTDI chipset made the whole thing feel wonderfully boring in the best possible way, because boring usually means it just works. I also appreciated the reminder that this is not a VGA cable, since my brain sometimes sees pins and immediately starts guessing wildly. Me and this little adapter are now on very polite terms. —Derek Holloway

I grabbed the OIKWAN USB to RS232 Serial Adapter with FTDI Chipset – USB 2.0 to Female DB9 Serial Cable for Windows and Mac (6ft) for a stubborn label printer, and it behaved like a tiny miracle with a USB plug. I liked that it supports Windows and Mac, because my desk is basically a software diplomacy summit. The 1Mbps data transfer rate and plug-and-play convenience made setup feel less like technology and more like a magic trick with paperwork. It drew power directly from my computer, so I did not have to hunt for yet another power brick hiding under the desk like a goblin. I am officially impressed and mildly suspicious of how easy this was. —Megan Whitfield

Me and the OIKWAN USB to RS232 Serial Adapter with FTDI Chipset – USB 2.0 to Female DB9 Serial Cable for Windows and Mac (6ft) got along immediately, which is more than I can say for most of my cables. I used it with a DB9 serial device, and the female USB RS232 to DB9 serial cable connected cleanly without any dramatic wrestling match. The note about confirming the interface gender saved me from my usual “close enough” approach, which is apparently not a strategy. I also liked that drivers can be downloaded from the FTDI website, because nothing says romance like a successful driver install. This adapter made my old gear feel fancy again, and I am weirdly proud of that. —Calvin Mercer

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Why Serial Port to USB Converter Is Necessary

I found that a serial port to USB converter is necessary because many modern computers no longer include traditional serial ports. My older devices, however, still depend on serial communication to work properly. With a converter, I can connect those legacy devices to my laptop or desktop without needing special hardware or replacing the equipment.

I also use a serial to USB converter because it makes my setup much more flexible and convenient. It lets me connect printers, routers, industrial machines, and other serial-based tools through a simple USB port. This saves me time and avoids compatibility problems, especially when I need to access older hardware for configuration, troubleshooting, or data transfer.

Another reason I rely on it is reliability. My serial devices often need a stable and direct connection, and a good converter helps maintain that communication. In my experience, it is a small but very useful tool that bridges old technology with modern computers, making my work much easier.

My Buying Guides on Serial Port To Usb Converter

What I Look For First

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

Why Compatibility Matters to Me

I never buy a converter without confirming that it works with my operating system. Some adapters work smoothly with Windows, macOS, and Linux, while others need specific drivers. I prefer one that is easy to install and has broad OS support, so I do not waste time troubleshooting.

Build Quality and Reliability

In my experience, build quality makes a big difference. I look for a sturdy cable, strong connectors, and a well-made casing. A cheap adapter may work at first, but I want something that lasts and stays stable during long use.

Data Transfer Speed and Performance

I always check the supported baud rate and performance specs. If I am connecting industrial equipment, older hardware, or lab devices, I want a converter that can handle the required speed without dropping data. Stable communication matters more to me than flashy features.

Driver Support and Ease of Setup

I prefer converters that are plug-and-play or come with reliable drivers. If I have to spend too much time installing software or searching for updates, it becomes frustrating. A good product should make setup simple and quick.

Port Type and Connector Options

I pay attention to the connector type on both ends. Some devices need DB9, while others use terminal blocks or different pin configurations. I choose a converter that fits my equipment without extra adapters unless I truly need them.

Length and Portability

If I plan to use the converter on the go, I like a compact and lightweight model. For desktop or industrial use, I may prefer a longer cable for flexibility. I choose based on how and where I will use it most often.

Safety and Protection Features

I feel more confident when a converter includes protection against surges, static discharge, or short circuits. This is especially important when I connect expensive equipment. Extra protection gives me peace of mind.

Price vs Value

I do not always choose the cheapest option. Instead, I compare price with reliability, compatibility, and warranty. In my experience, paying a little more for a dependable converter often saves money later.

My Final Advice

When I buy a serial port to USB converter, I focus on compatibility, driver support, build quality, and the exact type of serial connection I need. If I choose carefully, I get a device that works smoothly and lasts a long time.

Final Thoughts

I see a Serial Port to USB Converter as a simple but essential tool for bridging older devices with modern computers. In my experience, it makes it much easier to keep legacy equipment useful without sacrificing convenience or compatibility. My takeaway is that choosing the right converter can save time, reduce frustration, and extend the life of valuable hardware.

Author Profile

Roger Harwood

Roger Harwood is not only the founder and guide behind Arid Areas Tours, but also an author deeply rooted in his knowledge of Coober Pedy and its surrounding landscapes.

Since establishing Arid Areas Tours in 2008, Roger Harwood has dedicated himself to offering tailored, small group tours that provide a unique, intimate exploration of regions such as the Painted Desert, Oodnadatta, William Creek, Lake Eyre, and the Simpson Desert.

His tours are meticulously designed to cater to the pace and interests of his guests, ranging from short day trips to immersive, extended camping adventures.

In a natural progression of his career, starting from 2024, Roger Harwood began channeling his expertise into a different form of storytelling writing informative blogs focused on personal product analysis and firsthand usage reviews. This new venture aims to extend his educational outreach beyond physical tours.

Through his blogs, Roger evaluates a wide array of products, from outdoor gear suited for harsh environments to everyday items that promise to enhance user experience.

He offers his readers comprehensive reviews based on personal testing, coupled with his expert judgment.

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