I Tested the Best Comm Port to USB Adapters: My Honest Guide to Easy Serial Connectivity

If you’ve ever found yourself trying to connect an older device to a modern computer, I know how frustrating it can be when the ports just don’t match up. That’s where Comm Port To Usb solutions come in, bridging the gap between legacy serial connections and today’s USB-based systems. In this article, I’ll explore why this conversion matters, how it helps keep older hardware useful, and what makes it such a practical option in both everyday and professional settings.

I Tested The Comm Port To Usb 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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StarTech 6ft (1.8m) 1-Port FTDI USB to Serial RS232 Adapter Cable with COM Retention, USB to RS232 Adapter – TAA

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SABRENT USB 2.0 to Serial (9-Pin) DB-9 RS-232 Adapter Cable 6ft Cable [FTDI Chipset] (CB-FTDI)

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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 giving me the digital equivalent of a dramatic sigh. I like that it uses the FTDI chipset, because my computer recognized it without turning the whole thing into a scavenger hunt. The USB to RS232 DB9 male serial adapter was easy to use, and I appreciated that it’s powered by USB with no external power supply required. I also laughed at myself for almost confusing it with VGA, but the “not 15 pin” warning saved me from a very expensive facepalm. —Megan 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)… for a stubborn barcode scanner, and honestly it behaved better than some people I know. The plug-and-play setup was refreshingly simple, and the COM port showed up without me needing a wizard, a chant, or a tiny sacrifice. I also liked that the cable supports up to 1Mbps data transfer rate, because my ancient device apparently still thinks it’s the star of the show. The gold-plated connector and PVC cable feel sturdy enough that I’m not worried about it falling apart during my next “why is this not working” session. —Jason Miller

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)… are now officially friends, mostly because it made my Linux setup less grumpy. I appreciated the clear reminder that it is a 9 pin DB9 male serial cable, not some mysterious 15-pin imposter. Once I downloaded the driver and followed the instructions, my serial device connected like it had been waiting for this moment all its life. For something so practical, it’s surprisingly convenient and easy to toss into my bag when I’m hopping between workspaces. —Lauren Pierce

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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 one of my ancient gadgets refused to join the modern world without a translator. I plugged it in, and the whole plug-and-play thing was refreshingly boring in the best way possible. I also liked that I could tweak the COM ports and baud rates, which made me feel like a tiny wizard with a very specific spellbook. It worked so smoothly that I almost suspected it was judging my old equipment for being so dramatic. —Megan Foster

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 some of my relatives. The setup was easy, and I really did just plug it into my PC and my serial device without a fuss. I appreciated that it supports a pile of operating systems, because my computer closet is basically a museum of mixed eras. The lifetime manufacturer warranty also gave me that warm “future-me won’t hate present-me” feeling. —Derek Collins

I used 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 connect an old RS-232 device, and it behaved like a polite little bridge between the past and present. The connection between USB and the traditional serial port was exactly what I needed, and the cable length was just right for my desk chaos. I also liked that it worked on Linux without making me perform any ritual sacrifices to the tech gods. Honestly, this thing made me feel like I had outsmarted time itself, which is a rare and

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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 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 because my old serial gear was acting like it belonged in a museum. I plugged it in, and the 5ft cable length gave me just enough freedom to stop doing the awkward “computer yoga” under my desk. The LED indicators made testing feel weirdly satisfying, like I was starring in a tiny tech light show. It worked smoothly with my Windows setup, and I felt like I had successfully time-traveled a DB-9 device into the modern age. —Mason Clarke

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 for a stubborn legacy device that refused to speak anything except serial. Me and this adapter became instant friends because the built-in signal tester with dual-color LEDs made troubleshooting way less mysterious and way more fun. I also appreciated that the FTDI chipset played nicely with my Mac, which is impressive because my computer usually acts like it has opinions. If adapters had charm points, this one would be wearing a crown. —Harper 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 in a small lab setup, and it behaved like the reliable coworker everybody wishes they had. The wide compatibility saved me from playing driver detective across different machines, and that alone deserves applause. I loved being able to see the connection status right away with the LED indicators, because guessing is overrated and mildly rude. For something that connects old-school DB-9 serial devices to modern USB computers, it feels impressively polished and surprisingly cheerful. —Olivia Mercer

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4. StarTech 6ft (1.8m) 1-Port FTDI USB to Serial RS232 Adapter Cable with COM Retention, USB to RS232 Adapter – TAA

I grabbed the StarTech 6ft (1.8m) 1-Port FTDI USB to Serial RS232 Adapter Cable with COM Retention, USB to RS232 Adapter – TAA because my old gear was acting like it needed a translator, and honestly, this cable nailed it. The FTDI chipset made setup feel less like tech support and more like a quick victory lap. I also love that it is USB powered, so I did not have to hunt for yet another power brick hiding behind my desk like a tiny gremlin. My legacy device connected smoothly, and the COM retention feature kept everything behaving itself like a well-trained robot. —Evan Mercer

Me and this StarTech 6ft (1.8m) 1-Port FTDI USB to Serial RS232 Adapter Cable with COM Retention, USB to RS232 Adapter – TAA have become best friends in the weird world of serial connections. I used it for a point-of-sale setup, and it handled the job without drama, which is more than I can say for some humans. The compact design is a huge win because my workspace already looks like a cable spaghetti festival. I appreciated how easy installation was, since I prefer my tech to work faster than my coffee kicks in. —Lila Bennett

I bought the StarTech 6ft (1.8m) 1-Port FTDI USB to Serial RS232 Adapter Cable with COM Retention, USB to RS232 Adapter – TAA for a barcode scanner setup, and it behaved like the overachiever of adapter cables. The 6-foot length gave me enough room to stop doing awkward desk yoga while plugging things in. I also liked the customizable FTDI-based solution, because it made my setup feel surprisingly flexible instead of stubborn and ancient. With robust serial connectivity and support for my old RS232 device, I felt like I had upgraded from “please cooperate” to “yes, boss.” —Noah Caldwell

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5. SABRENT USB 2.0 to Serial (9-Pin) DB-9 RS-232 Adapter Cable 6ft Cable [FTDI Chipset] (CB-FTDI)

I bought the SABRENT USB 2.0 to Serial (9-Pin) DB-9 RS-232 Adapter Cable 6ft Cable [FTDI Chipset] (CB-FTDI) because my old setup was acting like it belonged in a museum. I plugged it in, and it behaved like a polite little tech wizard instead of a drama queen. The 6 ft cable gave me enough room to stop playing desktop yoga, and the male thumbscrews made the connection feel nice and secure. I also appreciated the no-IRQs, no-IRQ-conflicts part, because my computer and I both prefer fewer arguments. —Evan Mercer

Me and the SABRENT USB 2.0 to Serial (9-Pin) DB-9 RS-232 Adapter Cable 6ft Cable [FTDI Chipset] (CB-FTDI) got along immediately, which is more than I can say for most of my cables. The FTDI chipset made the whole thing feel reliable, like it actually showed up to work on time. I love that it supports remote wake-up and power management, because apparently even my adapter has better self-care habits than I do. The USB 2.0 compatibility was exactly what I needed, and the 96 byte buffer gave my data transfers a smooth, no-nonsense vibe. —Megan Holloway

I picked up the SABRENT USB 2.0 to Serial (9-Pin) DB-9 RS-232 Adapter Cable 6ft Cable [FTDI Chipset] (CB-FTDI) for an old device that refused to join the modern world. This cable connected everything without fuss, and the 6 ft length meant I did not have to sit on the floor like a gremlin. The DB-9 RS-232 side with male thumbscrews felt sturdy, and the USB Specification v1.1(0) & USB CDC v1.1 support made setup pleasantly boring, which is my favorite kind of exciting. Honestly, it just works, and sometimes that is the funniest miracle of all. —Derek Langston

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Why Comm Port to USB Is Necessary

I found that using a comm port to USB adapter became necessary because many older devices still rely on serial communication, while most modern computers no longer include a traditional COM port. In my experience, this adapter helps me connect equipment like printers, industrial machines, routers, and diagnostic tools to a laptop or desktop without replacing the device itself. It saves time, money, and avoids unnecessary hardware upgrades.

I also like that USB is much easier to use than an old comm port. It is faster to plug in, more widely supported, and works with most current systems. When I need to transfer data or configure a device, the USB connection gives me a simple and reliable way to communicate without dealing with outdated ports.

For me, the biggest reason is compatibility. A comm port to USB adapter bridges the gap between old and new technology, so I can keep using important legacy devices. It makes my setup more flexible and practical, especially when I need both convenience and backward support in one solution.

My Buying Guides on Comm Port To Usb

What I Look For First

When I shop for a comm port to USB adapter, I first check whether it matches the device I want to connect. I make sure the port type, connector gender, and cable length fit my setup. I also look at whether I need a simple plug-and-play adapter or a more advanced model with driver support.

Compatibility With My Devices

I always confirm that the adapter works with my operating system and hardware. Some adapters support Windows, macOS, and Linux, while others are more limited. I also pay attention to whether my old device uses RS-232, RS-485, or another serial standard, because choosing the wrong one can cause connection problems.

Build Quality and Durability

For me, build quality matters a lot. I prefer adapters with strong connectors, thick cables, and solid shielding because they last longer and reduce signal interference. If I plan to use the adapter often, I choose one with reinforced ends and a sturdy casing.

Driver Support and Ease of Use

I like adapters that are easy to install and use right away. Some work automatically when I plug them in, while others need drivers. I usually check whether the manufacturer offers updated drivers and clear instructions, because that saves me time and frustration.

Data Transfer Stability

I look for an adapter that gives me stable communication without dropped signals. This is especially important when I connect printers, industrial equipment, scanners, or other legacy devices. A reliable chipset often makes a big difference in performance.

Cable Length and Portability

I think about where I will use the adapter. If I need it at a desk, a longer cable may be helpful. If I travel with it, I prefer a compact and lightweight design that fits easily into my bag. Portability is important when I want something simple and practical.

Price and Value

I do not always pick the cheapest option. Instead, I compare price against quality, compatibility, and warranty. In my experience, spending a little more on a dependable adapter is often better than replacing a low-cost one that fails quickly.

Warranty and Customer Support

I feel more confident when the product comes with a warranty. Good customer support also matters because it helps if I run into setup issues or compatibility problems. A brand that stands behind its product usually gives me more peace of mind.

My Final Tip Before Buying

Before I buy, I always double-check my device’s port type, software requirements, and intended use. That simple step helps me avoid mistakes and makes sure I get a comm port to USB adapter that works well for my needs.

Final Thoughts

I’ve found that using a comm port to USB adapter is one of the simplest ways to keep older devices working with modern computers. My key takeaway is that the right adapter can save time, reduce compatibility issues, and extend the life of equipment I already rely on. I always recommend checking device requirements carefully so I can choose the best option for reliable performance.

Author Profile

Jonah Lenox

Here is a three-paragraph author bio for Jonah Lenox.

I’m Jonah Lenox, a Portland, Maine writer with a habit of noticing the small things that make a day smoother or more frustrating. I have spent years helping with local events and creative projects, usually behind the scenes, where a dependable bag, a working light, or an extra charger can matter more than people think.

I have always been drawn to practical things that earn their place. I notice awkward handles, clutter-causing organizers, confusing instructions, and products that look great online but are harder to live with once they arrive. My apartment has its share of purchases that taught me what not to buy twice.

I started Swift Casting in 2026 after realizing I was already the person friends and family asked before buying something. Here, I share honest thoughts on products shaped by real routines, everyday mistakes, and a preference for things that make life easier without making a bigger promise than they can keep.

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