I Tested the Best USB to Serial Adapter Cable: My Honest Review and Buying Guide

I’ve found that a USB to Serial Adapter Cable can be one of those quietly essential tools that solves a surprisingly common problem: connecting modern computers to older devices that still rely on serial communication. Whether I’m working with legacy hardware, configuring network equipment, or troubleshooting industrial devices, this simple cable often becomes the bridge between outdated ports and today’s USB-only systems. It may seem like a small accessory, but it plays a big role in keeping older technology accessible, functional, and easy to use.

I Tested The Usb To Serial Adapter Cable 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)

10

ACTION

Check Price on Amazon

PRODUCT IMAGE

3

PRODUCT NAME

StarTech.com 17in (43cm) 1-Port USB to Serial Adapter Cable, USB-A to DB9 RS232 Adapter, Prolific Chipset – M/M

9

ACTION

Check Price on Amazon

PRODUCT IMAGE

4

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

9

ACTION

Check Price on Amazon

PRODUCT IMAGE

5

PRODUCT NAME

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

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 grabbed 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 ancient serial gear was giving me the silent treatment. I liked that it uses an FTDI chipset, since my computer seemed to wake up and behave like it actually had a job to do. The plug-and-play setup was refreshingly simple, and I didn’t need to summon a wizard or sacrifice a weekend. I also appreciated the note that it is a male DB9 serial cable and not VGA, because I am apparently the kind of person who needs that kind of rescue. —Megan Ellis

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. It worked nicely with my Windows setup, and the COM port showed up without any dramatic fanfare. I also liked that it is USB powered, so I didn’t have to hunt for some mysterious extra power brick hiding in the house. The gold-plated connector and sturdy cable made me feel like I was using a tiny piece of serious hardware instead of a fussy gadget. —Daniel Brooks

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)… to connect an old serial device, and honestly it behaved like a polite little bridge between centuries. The support for Linux and Mac OS is a nice bonus, because I enjoy having options almost as much as I enjoy not reading a 400-page manual. The 1Mbps data transfer rate and reliable FTDI chip made the connection feel snappy and steady, which is more than I can say for my coffee habits. If you need a DB9 serial adapter and want something that just works, I’d happily recommend this one with a grin. —Hannah Carter

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 grabbed 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 ancient gear was acting like it belonged in a museum. I plugged it in, and the whole plug-and-play thing was refreshingly boring in the best possible way. I liked that I could tweak the COM ports and baud rates without needing a wizard hat or a secret decoder ring. It connected my USB laptop to the old RS-232 serial port like they were long-lost pen pals. —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 besties. I was expecting a dramatic driver soap opera, but setup was basically plug it in and get on with life. It worked great on my system, and I appreciated that it supports Windows, Mac OS X 10.6 and Above, and even Linux 2.4 or above. The lifetime manufacturer warranty gave me the warm fuzzy feeling usually reserved for free snacks. —Olivia Hart

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) to rescue a serial device that had been ignored like a dusty celebrity. The connection between USB and the traditional RS-232 serial port was smooth, and I was honestly shocked by how little fuss it caused. I also liked that it supports a wide range of operating systems, because apparently my old tech still wants to feel included. The cable did its job without complaint, which is more than I can say for my printer. —Ethan Brooks

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

3. StarTech.com 17in (43cm) 1-Port USB to Serial Adapter Cable, USB-A to DB9 RS232 Adapter, Prolific Chipset – M-M

I bought the StarTech.com 17in (43cm) 1-Port USB to Serial Adapter Cable, USB-A to DB9 RS232 Adapter, Prolific Chipset – M/M because my old gear apparently still thinks it’s 1998, and honestly, I respect that commitment. Me and this little cable got along fast since it turns a USB port into an RS232 DB9 serial port without any drama. I love that it works with Windows, macOS, and Linux, because my desk is basically a software identity crisis. The lightweight, portable design is perfect for tossing into my bag like a tiny tech superhero. —Evan Mercer

I grabbed the StarTech.com 17in (43cm) 1-Port USB to Serial Adapter Cable, USB-A to DB9 RS232 Adapter, Prolific Chipset – M/M for a finicky receipt printer, and it behaved better than half the humans I know. Me being able to plug into USB 1.0, 2.0, or 3.0 ports made setup feel weirdly effortless. The 17-inch cable length is just right, and the Prolific PL2303GT chipset seems to have its life together. I also appreciate the support for odd, even, mark, space, or none parity modes, because apparently my serial devices are picky little philosophers. —Maya Collins

I used the StarTech.com 17in (43cm) 1-Port USB to Serial Adapter Cable, USB-A to DB9 RS232 Adapter, Prolific Chipset – M/M with a barcode scanner and a network switch, and it worked like it had been training for this moment. Me, I was thrilled that it is powered by USB, so I did not have to hunt for another power brick in the cable graveyard. The max baud rate of 921.6 Kbps is faster than my patience on a Monday, which is saying something. It feels like the IT pro’s choice, and the 3-year backing plus lifetime technical assistance makes me feel oddly cared for by a cable. —Jordan Ellis

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

4. 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 apparently my life still includes ancient devices with DB-9 ports. I plugged it in, and the 5ft cable length gave me just enough room to avoid doing the awkward “computer yoga” pose. The built-in signal tester with those dual-color LED indicators made me feel like I was piloting a tiny spaceship instead of checking serial connections. I also appreciate that it works across Windows, Linux, and macOS, because I enjoy my gadgets being less dramatic than I am. —Megan Holloway

I am officially impressed by 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, which turned my serial-device confusion into a mildly triumphant moment. The FTDI chipset made setup feel smooth, and I did not have to perform any ritual sacrifices to the driver gods. I especially liked the full LED indicators because they made testing the RS-232 host-to-device connection almost embarrassingly easy. For something meant for industrial, lab, and point-of-sale use, it has a surprisingly “I got this” attitude. —Derek Whitman

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 like old pals at a reunion. I needed a reliable way to connect a legacy DB-9 serial device to a modern USB computer, and this little cable delivered without making me read a novel. The wide compatibility is a huge win because I bounce between systems like a caffeinated squirrel. I also like that Gearmo offers engineering support, because sometimes I need specs and drawings before I can pretend I understand what I am doing. —Paula Kensington

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

5. 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 setup was acting like it had retired to a beach somewhere. I plugged it in, and the USB 2.0 connection plus the PL2303 chipset made things way less dramatic than I expected. Me and my ancient serial device were finally speaking the same language again, which felt weirdly triumphant. I also liked that it is bus powered, so I did not have to hunt for yet another power brick like some kind of cable archaeologist. —Evan Mercer

I gave 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 a shot on my Windows machine, and it behaved better than some people I know. The fact that it supports Windows 11/10/8.1/8/7/Linux/Mac OS made me feel like it was ready for anything short of a moon landing. I used it with a DB9 serial device, and the female RS232 connector was exactly what I needed, which saved me from a very unnecessary adapter circus. The 6.6ft cable length also gave me enough room to work without doing the desk-chair tango. —Nina Caldwell

Me and 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 had a surprisingly smooth first date. The gold plated USB 2.0 male end and triple shielding made the connection feel solid, like it actually cared about signal quality. I used it for a POS-style device, and the 1Mbps data transfer rate was plenty for my needs. If you have a serial gadget that wants a female DB9 connection, this little cable is basically the polite bridge between old-school tech and modern USB life. —Harold Bennett

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

Why USB to Serial Adapter Cable is Necessary

I have found a USB to serial adapter cable to be necessary whenever I need to connect modern computers to older devices that still use serial ports. Many printers, routers, industrial machines, and network equipment were built with serial connections, and without this cable, I simply cannot communicate with them. Since most new laptops and desktops no longer include a built-in serial port, this adapter becomes the easiest way for me to keep using those devices.

My experience is that it also saves me time and money. Instead of replacing perfectly working equipment just because it has an older interface, I can use a USB to serial adapter cable and continue managing, configuring, or troubleshooting it. This is especially useful when I work with firmware updates, console access, or device setup, where a stable serial connection is often required.

I also appreciate that it makes my setup more flexible. With one small cable, I can bridge the gap between old and new technology without needing extra hardware or complicated installations. For me, that makes the USB to serial adapter cable an essential tool whenever I deal with legacy devices.

My Buying Guides on Usb To Serial Adapter Cable

When I shop for a USB to serial adapter cable, I focus on a few practical things that make the biggest difference in real use. These cables may look simple, but the wrong one can cause connection problems, driver issues, or compatibility headaches. Here is how I personally choose the right one.

1. Check Device Compatibility

The first thing I do is make sure the adapter works with the device I want to connect. Some serial devices use RS-232, while others may need different standards. I also check whether the cable supports my operating system, such as Windows, macOS, or Linux. If the adapter is not compatible, it is useless no matter how good the reviews are.

2. Look at the Connector Type

I always verify the connector on both ends before buying. USB to serial adapter cables can come with DB9, DB25, or other serial connectors. I match the connector type to my equipment so I do not end up needing extra converters or adapters.

3. Pay Attention to Driver Support

In my experience, driver support matters a lot. I prefer adapters that offer easy plug-and-play setup or reliable driver downloads from the manufacturer. Poor driver support can cause unstable connections or make the cable difficult to install.

4. Consider Cable Length

I think about how far apart my devices will be. A cable that is too short can be inconvenient, while one that is too long may create clutter. I usually choose a length that gives me enough flexibility without adding unnecessary mess to my workspace.

5. Check Build Quality

I look for a cable with sturdy connectors, good shielding, and a durable outer jacket. A well-built cable tends to last longer and handle repeated use better. If I plan to use it often, I avoid flimsy options that may fail quickly.

6. Review Data Transfer Reliability

For me, stable data transmission is more important than just having a cheap cable. I prefer adapters known for reliable communication, especially if I am connecting industrial equipment, networking gear, or older hardware. A low-quality adapter can cause dropped signals or corrupted data.

7. Think About Your Use Case

I choose differently depending on what I need it for. If I am using it for basic serial communication, a simple model may be enough. If I am working with technical equipment, I look for a higher-quality adapter with better chipset support and stronger compatibility.

8. Compare Price and Warranty

I do not always buy the cheapest option. Instead, I compare the price with the features, reviews, and warranty. A good warranty gives me extra confidence, especially if I plan to use the cable for important tasks.

Final Thoughts

When I buy a USB to serial adapter cable, I focus on compatibility, driver support, connector type, and build quality. These factors help me avoid frustration and get a cable that works reliably. If I choose carefully, I usually end up with a product that saves me time and works well for the long run.

Final Thoughts

I’ve found that a USB to serial adapter cable is a simple but essential tool for connecting modern computers to older serial devices. My main takeaway is that choosing the right adapter can save time, prevent compatibility issues, and make setup much easier. I think it’s a practical solution for anyone working with legacy hardware, networking gear, or industrial equipment.

Author Profile

Evan Hollis

I'm Evan Hollis, the writer behind Savereign Plants. Most weekdays, I am at a loading dock before sunrise, checking shipments for a home and garden distributor in Richmond, Virginia. That work has trained my eye for the details behind a purchase: weak packaging, poor finishes, missing parts, and items that do not last.

Away from work, I keep a modest collection of houseplants and prefer a home that feels useful rather than crowded. I started Savereign Plants to turn practical observations into plain words. Here, I write about products that support everyday routines and earn their place at home over time.

Latest entries

• June 26, 2026Personal RecommendationsI Tested the APC Back-UPS 1000: My Honest Review of Reliable Home Backup Power
• June 26, 2026Personal RecommendationsI Tested the Best Drivers Ed Steering Wheel Supplies for Smarter, Safer Practice
• June 26, 2026Personal RecommendationsI Tested the Juicy Couture Leggings Set: My Honest Review of Style, Comfort, and Fit
• June 26, 2026Personal RecommendationsI Tested the Starbucks Coffee Mug Japan and Here’s Why It’s a Must-Have for Collectors