Best Serial Adapters of 2025

"I needed a reliable connection for my Singer Quantum XL-6000 Sewing/Embroidery machine. The setup was straightforward with the included manual and drivers. Now I'm a happy camper with my new adapter!"

"This is my fourth USB-RS232 cable, and I finally found one that works flawlessly. It performs well on Windows, Linux, and Android. A bit on the pricier side, but worth it!"

"I had issues with my previous adapter, but this one worked perfectly after installing the driver on my Mac. My only concern was the mini CD, but I found the driver online easily."

"I find the design simple and classic, and the printing is clear. They seem high quality and reliable."

"Having used many of these on marine vessels, I can say they hold up well in moist and corrosive environments. The narrow design is a real space-saver!"

"I had a great experience. Mine did not fall apart when I removed the jack screws, unlike what some others have mentioned."

"I found this cable to be unique and essential for my work. It interfaces perfectly with my devices and performs exceptionally well."

"Initially concerned about the driver installation, I was pleased to discover it worked flawlessly without any additional software on Windows 10. The quality exceeded my expectations."

"I was able to use this cable with my old Xbox. The ease of use and performance were remarkable. It paired automatically without any issues on Windows 11."

"I got this cable to connect my Motorola XTS5000 to my Windows 11 laptop. The installation was super easy, and the drivers installed automatically. The cable is well-made and has great strain relief. It works perfectly, but I haven't tested it on older systems yet."

"I purchased this to upgrade the software on my MTH DCS Systems TIU. It worked perfectly for my needs, and I'm very satisfied with its performance."

"I ordered this cable for work to connect to specialized equipment. The price was fair, and the quality seems better than my old Radio Shack cable. However, I had to search online to find the right driver. It was a bit frustrating at first, but once I figured it out, everything went smoothly. I would recommend this product for its solid build quality!"

"I found this tool to be ideal for hardware hacking. I successfully used it to hack my '17 Yaris iA's infotainment center, allowing me to enable a range of features like phone mirroring and WiFi hotspot."

"I've used this board multiple times without problems, mainly due to my own learning curve. It's worked well for programming devices like ESP32s and Arduinos, provided I connect it correctly."

"Initially, I had issues getting it to work, but after a few attempts, I was able to program my transceiver. While it wasn't exactly as advertised, it ultimately proved functional for my needs."

"I recently bought the SABRENT 6-FT USB to RS-232 DB9 Serial Adapter and it's been a reliable solution for my connectivity needs. The Prolific PL2303 chipset ensures stable and efficient data transfer, and its plug-and-play functionality made setup a breeze. I’ve had no issues so far, and I would highly recommend this adapter for connecting serial devices!"

"I've had three of these adapters in service and have never experienced a single complaint. They perform with solid plug-and-play efficiency and require no special drivers. Although they might cost a bit more than some alternatives, the FTDI chipset performance and reliability make them worth it. I recommend them without reservation!"

"I needed a working USB RS232 converter for Windows 11, and after trying a couple of others, this one worked flawlessly! It's great to finally find a product that meets my needs without any hassle!"

"These adapters are fantastic! I can easily remove the screws without worrying about them falling apart, allowing me to plug them directly into my cable and device. However, I wish they didn't come in a 2-pack with the same genders; having one of each type would be more beneficial for me."

"I needed to interface with some hardware and was unsure about the gender of the DB-9 connectors or if it was a pass-through or NULL modem. Thankfully, these adapters worked perfectly and helped me get everything up and running. They seem really well-made too!"

"I bought these adapters to solve a driver issue on my laptop; it's a bit odd, but I read online that others faced the same problem. My PC didn't recognize the RS232 cable, and using this adapter turned out to be the solution!"

"I found it works great and is easy to customize the pins I needed."

"For my project, I needed a custom mini-DIN to DB9 serial cable. This adapter helped me easily create the standard DB9 end for my PC. After crimping ferrules on the wires, I plugged them into the adapter's screw-down terminals, and everything worked perfectly. My only issue was that the hold-down screws aren't threaded properly, so they aren’t captive like other connectors. Overall, I have no complaints and would recommend this to anyone."

"I used this product for my Amateur Radio Voice Over IP node, and it performed very well. The included screwdriver is the right size for the terminal strips, and the terminals held the wires securely in place. This connector is ideal for projects where a standard RS-232 cable configuration is not appropriate."

"I find this unit to be well-designed and offered at a remarkably low price for its functionality. The material quality is absolutely top-rate, and it's incredibly convenient for connecting a USB port to a serial port. I simply plug it into my laptop's USB port and connect it to my microcontroller. The clear plastic casing is a smart touch, allowing me to monitor the LEDs for data transfer. Programming my microprocessor has become a breeze on my Windows 10 computer, and installing the Win 10 driver was straightforward from the FTDI website. The ability to switch between 3.3 volt and 5 volt logic using a jumper is a solid feature. I highly recommend this!"

"I purchased this adapter to connect a uBlox Neo-8M GPS module for creating a stratum 1 NTP server on Windows 10. It powers the GPS without any issues. I did solder a lead to the CD hole on the PCB and connected it to the PPS output. While it works, I noticed that the RS-232 control signals like CD and CTS are inverted, which caused my PPS driver to trigger on the falling edge instead of the leading edge. I managed to work around this with an offset."

"This unit has proven to be a good solution for a serial port converter, especially for resetting electronic devices. I was impressed by its quality and reliability, especially after having issues with other off-brand adapters. Overall, I'm very satisfied with the DSD Tech brand quality."

“I've consistently had great experiences with StarTech products. This DB-9 to DB-25 adapter works as expected. It's a straight through adapter, perfect for connecting my PC's USB DB-9 serial converter to my old dot matrix printer.”

“I connected it between my modem and serial cable, and it adapted the wiring flawlessly. Hardware flow control even works perfectly!”

“This adapter was exactly what I needed. I couldn't have connected my new computer without it!”