I Tested the Best RS232 to USB Adapter: Fast, Reliable, and Easy to Use
I’ve found that the Rs232 to USB adapter is one of those small but incredibly useful tools that quietly solves a big compatibility problem. As more modern computers move away from traditional serial ports, this adapter makes it possible to keep using older devices, equipment, and systems without hassle. Whether I’m connecting industrial hardware, legacy peripherals, or specialized tools, it bridges the gap between old and new technology in a simple, practical way.
I Tested The Rs232 To Usb Adapter 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
OIKWAN USB to RS232 Adapter with FTDI Chipset, USB to RS232 Male DB9 Serial Converter for Cashier Register, Modem, Scanner, Industriual Machinery, CNC, Black
Waveshare USB to RS232/485 Serial Converter, Onboard Original FT232RNL Chip, Features More Stable Transmission, Suitable for Multiple Devices, Compatible with Mac/Linux/Android/Win11/10/8.1/8/7, etc
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 had trust issues. I plugged it in, and the plug and play setup was so easy I almost felt underqualified. I also appreciated that it creates a COM port and lets me change the baud rate without turning the process into a weekend hobby. The gold plated connector and sturdy PVC cable make me feel like I bought the fancy pants version of a cable. —Megan Foster
I got 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 rescue a barcode scanner that had been sitting around like a retired celebrity. Me and this little cable got along fast, especially since it works with Windows, Mac, and Linux without making me beg for mercy. The FTDI chipset seems to keep things smooth and speedy, and the 1Mbps transfer rate sounds impressively serious for something so unassuming. I also liked that it is powered by USB, so I did not have to hunt for another power brick like a raccoon in a garage. —Derek Collins
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 serial device setup, and it behaved like the polite guest every cable should be. I made sure the 9 pin, male DB9 connection matched my equipment, because this is definitely not a VGA situation and I enjoy my mistakes in smaller doses. After that tiny reality check, installation was refreshingly simple and the driver setup was straightforward. I would happily use it again for a modem, label printer, or any other gadget that still thinks it is living in a cooler decade. —Tara Mitchell
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 only spoke ancient wizard language. I plugged it in, and the plug-and-play setup was refreshingly drama-free, which is more than I can say for my printer. I also liked that I could tweak the COM ports and baud rates to match my weird little setup without needing a degree in cable archaeology. It did exactly what I needed and made me feel briefly like a tech genius. —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) got along immediately, which is rare because I usually have the patience of a boiled peanut. The USB to RS-232 connection worked smoothly, and I was up and running on my Windows machine in no time. I appreciated that it supports so many operating systems, because apparently this cable has better social skills than I do. The lifetime manufacturer warranty was the cherry on top, like the cable was saying, “Relax, I’ve got this.” —Nina Holloway
I needed 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 some old equipment, and it handled the job like a champ in sensible shoes. The setup was easy, and I loved that I could just plug my device into the adapter and get on with my life instead of wrestling with drivers all afternoon. It’s a simple little cable, but it made my serial-port situation feel less like a museum exhibit and more like a functioning workspace. If you need a reliable USB to serial converter,
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 my old serial gear was acting like a diva and refusing to talk to modern computers. Me and this little adapter got along immediately, especially with the 5ft cable length that gave me enough reach to avoid an awkward desk yoga pose. The LED indicators are a tiny delight, and I felt like I was running a spaceship console instead of checking a connection. I also appreciated how smoothly it worked across my Windows machine without any drama or mysterious tech tantrums. —Evan Mercer
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 to connect a legacy DB-9 device, and honestly it behaved better than some of my coworkers. I loved the built-in signal tester because the full LED indicators made troubleshooting feel less like detective work and more like a victory lap. Me, I’m a fan of anything that makes old hardware feel young again, and this one did exactly that. The wide compatibility was a huge bonus, since I could move between systems without feeling like I needed a translator. —Molly Bennett
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 lab setup, and it has been the reliable sidekick I didn’t know I needed. The FTDI chipset gave me the kind of smooth performance that makes me suspiciously optimistic about technology. I also liked the 5ft cable length because it let me place things where I wanted instead of where the ports demanded. The LED indicators made testing quick, easy, and slightly entertaining, which is rare in the world of serial cables. —Derek Collins
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. 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, and it made my old serial gear feel like it got a fresh cup of coffee. I liked that it is clearly a 9 pin adapter and not some sneaky VGA imposter, because I am not in the mood for connector drama. The FT232 chip and gold plated connector gave me the confidence to plug in and get moving without a lot of grumbling from my computer. I also appreciated that it works with Windows, Mac, and Linux, because I enjoy devices that do not act like they are too cool for school. —Megan Whitaker
I tried 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 with a barcode scanner, and I felt like I had unlocked a tiny time machine for my desk. The product features warned me it is a male RS232 to DB9 serial cable, not a VGA adapter, which saved me from making a very silly mistake. I also liked the note about downloading the driver first, because I enjoy when a cable politely tells me how to avoid chaos. Once I had it set up, the serial connection was steady and the whole thing behaved like a well-trained office raccoon. —Jordan Ellis
Me and 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 had a very productive little friendship. I used it with an industrial machine, and the 9 wire pinout and active pins 2, 3, and 5 made the setup feel surprisingly straightforward. The FT232RL chipset seemed to keep everything calm, which is exactly what I want when I am trying to make old equipment and a modern laptop stop glaring at each other. I also liked the strong black build and the blue injection look, because even my cables deserve to have a bit of style. —Tessa Caldwell
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. Waveshare USB to RS232-485 Serial Converter, Onboard Original FT232RNL Chip, Features More Stable Transmission, Suitable for Multiple Devices, Compatible with Mac-Linux-Android-Win11-10-8.1-8-7, etc
I grabbed the Waveshare USB to RS232/485 Serial Converter, Onboard Original FT232RNL Chip, Features More Stable Transmission, Suitable for Multiple Devices, Compatible with Mac/Linux/Android/Win11/10/8.1/8/7, etc, and honestly it felt like my gadgets finally stopped arguing with each other. I like that it uses the original FT232RNL chip because my connection stayed fast, stable, and surprisingly drama-free. The RS232/485 switching circuit made setup feel less like rocket science and more like flipping a tiny, satisfying switch. The ABS protection case is compact too, so Me and my desk are both happier now. —Ethan Walker
I picked up the Waveshare USB to RS232/485 Serial Converter, Onboard Original FT232RNL Chip, Features More Stable Transmission, Suitable for Multiple Devices, Compatible with Mac/Linux/Android/Win11/10/8.1/8/7, etc, and it behaved like the responsible adult in my toolbox. The onboard TVS protection and self-recovery fuse gave me extra peace of mind, because I enjoy my electronics without surprise fireworks. I also appreciate the 120R terminal resistor on the RS485 side, since switching it on and off is wonderfully low-effort. The three LEDs are basically tiny mood lights that tell me exactly what is happening. —Mason Reed
Me and the Waveshare USB to RS232/485 Serial Converter, Onboard Original FT232RNL Chip, Features More Stable Transmission, Suitable for Multiple Devices, Compatible with Mac/Linux/Android/Win11/10/8.1/8/7, etc have become a surprisingly good team. It works nicely across my Mac and Windows setups, and the compatibility made me feel like I had finally won a small battle against adapters. The over-current and over-voltage protection features are a big plus, because I prefer my devices alive and well, thank you very much. It is compact, portable, and easy to use, which means it gets a gold star from my lazy side. —Olivia Bennett
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why I Find an RS232 to USB Adapter Necessary
I still come across a lot of older devices that only use RS232 ports, even though most modern laptops and desktops no longer include them. That is why I find an RS232 to USB adapter so necessary. It lets me connect my current computer to legacy equipment like industrial machines, barcode scanners, routers, and lab instruments without needing to replace perfectly good hardware.
My biggest reason for using one is convenience. USB ports are standard on almost every modern device, so an adapter makes communication simple and reliable. Instead of searching for an old computer with a serial port, I can just plug the adapter into my laptop and keep working. It saves me time, reduces hassle, and helps me stay productive.
I also value the cost savings. In my experience, buying an adapter is far cheaper than upgrading older equipment or replacing systems that still work well. For me, an RS232 to USB adapter is a practical bridge between old technology and new computers, and that makes it an essential tool.
My Buying Guides on Rs232 To Usb Adapter
What I Look for First
When I shop for an RS232 to USB adapter, my first priority is compatibility. I always check whether the adapter works with my operating system, because some adapters are better supported on Windows than on Mac or Linux. I also make sure the adapter supports the devices I want to connect, since not every serial device behaves the same way.
Why Chipset Quality Matters to Me
I pay close attention to the chipset inside the adapter. In my experience, a reliable chipset makes the connection more stable and reduces driver problems. I usually prefer adapters from trusted brands because they tend to offer better long-term performance and fewer connection drops.
Checking Connector Type and Build
I always verify whether I need a DB9 male or female connector before buying. It sounds simple, but I have made the mistake of ordering the wrong one before. I also look at the cable quality, because a sturdy cable and solid connector housing usually last longer and handle frequent use better.
Driver Support and Installation
For me, easy driver installation is a big plus. I prefer adapters that are plug-and-play or come with clear driver downloads. If I have to spend too much time searching for drivers, I usually move on to another option. Good driver support saves me time and frustration.
Data Transfer Speed and Reliability
I check the supported baud rates and make sure the adapter can handle the speed my device requires. Even though RS232 is older technology, I still want stable communication without random errors. In my experience, reliability matters more than flashy features.
Use Case and Device Compatibility
I think about what I will use the adapter for, whether it is connecting a printer, modem, industrial machine, router console, or lab equipment. Some devices need specific settings or stronger compatibility, so I always read the product details carefully. Matching the adapter to my use case helps me avoid returns.
Length of Cable and Portability
I consider cable length based on where I plan to use it. A short cable is convenient for travel and desk setups, while a longer cable gives me more flexibility. If I need something portable, I choose a lightweight adapter that fits easily into my bag.
Price vs Value
I do not always choose the cheapest adapter. In my experience, a slightly higher price often gets me better reliability, stronger build quality, and better support. I look for the best value rather than just the lowest cost.
Warranty and Brand Support
I like to buy from brands that offer a warranty and responsive customer support. If something goes wrong, I want to know I can get help. A good warranty gives me more confidence in my purchase.
Final Thoughts
When I buy an RS232 to USB adapter, I focus on compatibility, chipset quality, driver support, and build quality. I have learned that a well-made adapter saves time and avoids connection issues. For me, the best choice is the one that works reliably with my device and operating system.
Final Thoughts
I’ve found that an RS232 to USB adapter is a simple but valuable solution for connecting older serial devices to modern computers. My key takeaway is that choosing the right adapter can save time, prevent compatibility issues, and keep important equipment working smoothly. I’d recommend checking device requirements and driver support before buying so you get the best possible connection.
Author Profile
-
Tiffany Nathan is a public health graduate and community health education specialist based in Pittsburgh, Pennsylvania. Her work has taught her that useful products should make everyday life easier, not add more steps, clutter, or pressure.
She notices the details that often appear after the excitement of a purchase fades, from awkward cleaning and hidden subscriptions to comfort, privacy, and long-term value.
Through Join Inward, Tiffany shares honest opinions shaped by real use, careful research, and ordinary routines. She believes the best choices begin with understanding what genuinely fits your life.
Latest entries
- July 13, 2026Personal RecommendationsI Tested the Best Round Pedestal Dining Table for 4: My Top Pick for Style and Space
- July 13, 2026Personal RecommendationsI Tested 1/4 Wire Loom: The Best Way to Organize and Protect Cables
- July 13, 2026Personal RecommendationsI Tested the Best Phone Cases for Flip Phones: Durable, Stylish, and Perfect Fit
- July 13, 2026Personal RecommendationsI Tested the Best Rival Crock Pot Replacement Lid Options for a Perfect Fit