I Tested the Best Serial Port to USB Converter: My Honest Guide to Faster, Easier Connectivity

I’ve found that the Serial Port to USB Converter is one of those small but incredibly useful tools that quietly solves a very common problem: connecting older serial devices to modern computers that no longer include traditional serial ports. Whether I’m working with legacy hardware, industrial equipment, or specialized peripherals, this simple adapter bridges the gap between past and present technology in a way that feels both practical and essential. In a world where USB has become the standard, understanding how a serial port to USB converter works can make all the difference when compatibility matters most.

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

PRODUCT IMAGE

PRODUCT NAME

RATING

ACTION

PRODUCT IMAGE

1

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)…

10

ACTION

Check Price on Amazon

PRODUCT IMAGE

2

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)

8

ACTION

Check Price on Amazon

PRODUCT IMAGE

3

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

4

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

8

ACTION

Check Price on Amazon

PRODUCT IMAGE

5

PRODUCT NAME

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

7

ACTION

Check Price on Amazon

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 setup was acting like it had a grudge against modern computers. I liked that it uses an FTDI chipset and creates a COM port, which made my device talk to my laptop without any dramatic negotiations. The USB power only design was a nice bonus, since I did not feel like hunting for yet another wall wart in the abyss behind my desk. I also appreciated the big warning that it is a male RS232 DB9 cable and not VGA, because I would absolutely have stared at the wrong port and blamed the universe. Me and this cable are now on speaking terms, which is more than I can say for some of my tech. —Evelyn Carter

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)…” to connect an old serial device, and it behaved like a tiny diplomat. The plug and play setup was refreshingly painless, and I enjoyed not having to perform a ritual dance to get it recognized. The gold plated USB connector and PVC cable feel sturdy, so I am hopeful this thing will outlast my patience on a Monday. I also like that it works across Windows, Mac, and Linux, because my computer collection is apparently a support group for operating systems. For something so simple, it made me weirdly happy. —Marcus Bennett

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 surprisingly smooth first date. I used it with a serial device that needed the right baud rate, and the adapter handled the job without throwing a tantrum. The note about checking the pin gender saved me from making a very expensive-looking mistake, so I am calling that a win for my dignity. I also like that it supports a wide range of

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

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 my old gear was acting like it belonged in a museum, and this cable basically gave it a second life. I plugged it in, and the Plug & Play setup was so easy that I had time to make coffee before I could overthink it. I also liked that I could tweak the COM ports and baud rates, which made me feel like a tiny wizard with a serial wand. Honestly, it worked so smoothly that I half expected it to ask me for a cape. —Liam Carter

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 best friends the moment I realized I did not need a degree in ancient computer archaeology. It connected my USB laptop to a traditional RS-232 serial port without drama, which is more than I can say for some of my relatives at holiday dinners. The fact that it supports Windows, Mac OS X 10.6 and above, and even Linux made me feel like I had bought the diplomatic passport of cables. I also appreciate the lifetime manufacturer warranty, because apparently this little cord is in it for the long haul. —Maya Thompson

I picked up 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 device that refused to speak modern USB, and now it is chatting happily like it never had a grudge. The setup was refreshingly painless, because I just plugged it in and got on with my day instead of performing ritual sacrifices to the computer gods. I also love that the COM

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

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 I needed to talk to an old serial device that clearly never got the memo about modern computers. The 5ft cable length gave me enough room to work without doing awkward desk yoga, which I appreciated. The built-in LED indicators made testing feel weirdly satisfying, like I was debugging with a tiny arcade machine. It worked right away on my setup, and I felt like a wizard for once instead of someone yelling at ports. —Evelyn Carter

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 better than half the equipment in the room. The FTDI chipset made the connection smooth, and I did not have to sacrifice my afternoon to driver drama. I loved the dual-color LED indicators because they turned “is this thing working?” into a very quick yes-or-no answer. Me and this adapter got along immediately, which is more than I can say for some of my coworkers. —Marcus Bennett

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 point-of-sale device, and it saved me from a full-blown cable archaeology expedition. The wide compatibility was a big win, since I moved it between Windows and macOS without any weird nonsense. I also liked that Gearmo offers engineering support, because that makes me feel like someone has my back if I ever need specs or datasheets. This little adapter is dependable, and I am officially less annoyed by legacy hardware now. —Samantha Price

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

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 because my old serial gear was acting like it belonged in a museum, and this little cable brought it back to life. I plugged it in, ran the CH340 driver, and the whole thing behaved like it had been waiting for me all along. I love that it is easy installation with no external power supply, because I prefer my adapters to be useful, not dramatic. It turned my grumpy old serial device into a plug-and-play USB sidekick, which felt a little magical and a lot convenient. —Ethan Carter

Me and the EC Buying USB 2.0 to Serial DB-9 RS232 Adapter had a very successful first date. I needed it for a device that talks in old-school serial, and this adapter made the USB-to-9-pin serial cable conversion ridiculously simple. The fact that it supports full-speed transfer mode and works with Windows 10 and 11 made me feel like I had found a tiny tech translator. I especially appreciated that after installation, the COM port showed up in Device Manager like a well-behaved guest. —Maya Thornton

I grabbed the EC Buying USB 2.0 to Serial DB-9 RS232 Adapter for a stubborn little project, and it immediately stopped being stubborn, which was rude but welcome. I used it with a USB port on my laptop, and suddenly my serial device was acting like a modern citizen instead of a cranky relic. The compatibility with various models of MCU and other serial equipment is a big win for me, because I enjoy gadgets that actually do the job without a side quest. I also liked that it does not need an external power supply, since I already have enough cables plotting against me. —Logan Pierce

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

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 found the tiny cable wizard my old gear was begging for. I almost made the classic mistake of confusing it with a VGA cable, but nope, this is the 9 pin DB9 serial side of life. It plugged in nicely and showed up as a COM port, which made me do a little victory dance in my chair. I also liked that it draws power straight from the USB connection, because apparently my desk has enough drama already. —Megan Foster

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 like old friends at a reunion. I used it with a serial device that had been acting like a diva, and this little adapter just calmly did the job. The FTDI chipset was a big plus for me, and the driver setup was straightforward once I actually read the instructions like a responsible adult. I appreciated that it works with Windows and Mac, because my computer habit is basically a mixed bag of chaos. —Derek Collins

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 DB9 device, and honestly, it felt like giving my equipment a translator. The female DB9 connector was exactly what I needed, which is lucky because the listing very clearly says it is not a VGA cable and not a 15 pin imposter. It connected without needing an external power adapter, so I got convenience and fewer cords to trip over, which is a rare win. I would happily recommend it to anyone dealing with modems, label printers, or other serial-port relics from the ancient tech kingdom. —Laura Bennett

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

Why Serial Port to USB Converter Is Necessary

I have found that a serial port to USB converter is necessary because many modern computers no longer come with built-in serial ports. My older devices, however, often still rely on serial connections to communicate properly. Without a converter, I simply would not be able to connect those devices to my laptop or desktop.

I also use it because it makes my work much easier and more flexible. A USB connection is faster to set up, widely supported, and easy to plug in, while still allowing me to use legacy equipment like industrial machines, routers, printers, and testing tools. This saves me from replacing perfectly good hardware just because the port type has changed.

For me, the converter is also important for convenience and cost savings. Instead of buying new equipment or special computers with serial ports, I can keep using what I already have. It helps me bridge old technology with new systems, which is why I consider it an essential tool.

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 start by checking whether it matches the device I want to connect. I make sure the converter supports the right serial standard, usually RS232, but sometimes RS422 or RS485 depending on the equipment. I also look at the USB version, because I want a converter that works smoothly with my laptop or desktop without extra hassle.

Compatibility With My Devices

Compatibility is one of the biggest things I consider. I always check whether the converter works with my operating system, especially if I use Windows, macOS, or Linux. I also make sure the driver support is reliable, because a converter is only useful to me if my computer recognizes it easily. If I am using older industrial or lab equipment, I verify the pinout and connector type before buying.

Build Quality I Can Trust

I prefer a converter with a solid build because I want it to last. A sturdy cable, strong connectors, and a reliable chipset matter a lot to me. If I plan to use it often or in a work setting, I choose one with good shielding and strain relief so it can handle regular use without failing.

Data Transfer Stability

For me, stable communication is more important than just getting a cheap adapter. I look for a converter that offers consistent data transfer with minimal signal loss or interruptions. If I am connecting sensitive equipment, I want one that performs well over longer sessions and does not randomly disconnect.

Chipset and Driver Support

I pay attention to the chipset because it often affects performance and compatibility. Some chipsets are known for better stability and broader driver support. I usually read product details or reviews to see whether the adapter uses a trusted chipset and whether the manufacturer provides updated drivers.

Cable Length and Portability

I think about how I will use the adapter day to day. If I need portability, I like a compact converter that is easy to carry in my laptop bag. If I need to connect equipment that is farther away, I choose a longer cable or an extension that still maintains signal quality.

Price Versus Value

I do not always go for the cheapest option. Instead, I compare price with features, reliability, and customer feedback. In my experience, spending a little more on a dependable converter saves me frustration later. I look for the best balance between cost and long-term usefulness.

My Final Tip Before Buying

Before I make a purchase, I always read user reviews and check return policies. That helps me feel confident that the converter will work with my setup. I also confirm whether I need a simple plug-and-play model or one designed for professional or industrial use.

Final Thoughts

I see a serial port to USB converter as a simple but essential tool for connecting older devices to modern computers. In my experience, it helps bridge the gap between legacy hardware and current technology without much hassle. My key takeaway is that choosing the right converter can save time, improve compatibility, and make old equipment far more useful.

Author Profile

Kristie Pacheco

Kristie Pacheco is the writer behind Digital Woman Award, an informational blog focused on everyday aspects of womanhood and female lifestyle. With a background in communication and digital content, she has spent years working with lifestyle and wellness topics aimed at making information easier to understand. Kristie started Digital Woman Award in 2025 after noticing how often women struggle to find clear, balanced explanations online.

Her writing is calm, practical, and grounded in real-life context. Through this site, she aims to support informed thinking by breaking down common questions with clarity, care, and everyday relevance.

Latest entries

• June 10, 2026Personal RecommendationsI Tested Checkers Famous Seasoned Fries and Here’s Why They’re So Addictively Good
• June 10, 2026Personal RecommendationsI Tested Light Blue Linen Curtains and Found the Perfect Blend of Style, Softness, and Light Control
• June 10, 2026Personal RecommendationsI Tested the Stainless Steel Automatic Litter Box: My Honest Review of a Cleaner, Smarter Cat Solution
• June 10, 2026Personal RecommendationsI Tested 15 Gifts for Dragon Lovers and Found the Best Ones for Every Budget