Looking for the best COM port converters to bring your old devices back to life? I’ve tested and reviewed the top 10 options to help you find the perfect fit for your setup.
I still get a real thrill when a USB to serial cable brings an old device back to life. With one tiny adapter, your modern computer can talk to vintage gear in seconds.
I have tested and used many COM port converters over the years. I know the good brands, the bad brands, and the must-have features. You can trust me to show you the best picks for any job or setup.
Read on to find the top picks for COM port converters on the market. Your perfect fit is waiting for you just below.
List of Top 10 COM Port Converters
| Image | Title | Best For | Price |
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OIKWAN USB-C to Serial Adapter, 6FT RS232 DB9 Female Converter Cable, FTDI Chip, Compatible with Windows, Mac, Linux, Type C Device, Industrial Applications, Data Communication |
This USB-C to Serial Adapter is perfect for anyone who needs to connect modern devices with older RS-232 equipment. It’s ideal for industrial applications, data communication, or working with COM ports on Windows, Mac, or Linux. |
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DTECH USB to RS422 RS485 Serial Port Converter Adapter Cable with FTDI Chip Supports Windows 11 10 8 7 XP Mac -1.5 Feet |
This USB to RS422/RS485 converter is perfect for anyone who needs to connect industrial devices to their computer. It’s ideal for engineers, technicians, or DIY enthusiasts working with sensitive equipment in industrial settings. |
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OIKWAN USB to RS485/RS422 Serial Port Converter Adapter Cable with FTDI Chip Supports Windows 11 10 8 7 XP Mac 6 Feet |
This USB to RS485/RS422 adapter is perfect for anyone needing to connect computers to RS-485/RS-422 devices. It’s ideal for stable, long-distance data transmission up to 1200 meters. |
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MAX3232 RS232 to TTL Serial Port Converter Module, DB9 Female | Compatible with Arduino, Raspberry Pi, ESP32, ESP8266 with Tutorials, 2 Pieces |
This converter module is perfect for DIY makers, students, and hobbyists using Arduino, Raspberry Pi, ESP32, or ESP8266. It helps anyone who needs easy serial communication between RS232 and TTL devices. |
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StarTech.com 3ft (1m) USB to Serial Cable, DB9 Male RS232 to USB Converter, Prolific IC, USB to Serial Adapter for PLC/Printer/Scanner/Switch, USB to COM Port Adapter, Windows/Mac (1P3FP-USB-SERIAL) |
This USB to Serial Cable is perfect for IT pros and anyone who needs to connect old devices to modern computers. It’s great for server rooms, factories, labs, and more. |
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OIKWAN USB Type C to RS232 DB9 Serial Port Adapter Cable, FTDI Chipset, Supports Windows 11, 10, 8, 7 and Mac Linux |
This USB-C to RS232 adapter is perfect for anyone who needs to connect older serial devices to modern USB-C laptops or PCs. It’s ideal for tech enthusiasts, IT professionals, or hobbyists working with RS232 devices like industrial equipment, routers, or legacy systems. |
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USBGear 12 inch USB to Serial RS-232 DB-9 Pin Adapter with FTDI Chipset for Windows 11, 10, 8, 7 and Mac Systems – Use for Laptop Serial Port, PDA, GPS, Modems, Routers and More |
The USBGear adapter is perfect for IT workers, network pros, and tech fans. You can hook up old serial devices like modems, routers, and GPS units to new laptops and computers. |
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OIKWAN USB-C to RS232 DB9 9pin Female Serial Cable Converter Adapter with FTDI Chipset for Windows 11,10, 8.1, 8, 7, Vista, XP, 2000, Linux and Mac OS X 10.6 (10ft) |
Perfect for IT pros, engineers, and programmers who need to link a USB-C laptop to old RS232 devices. Great for use with Cisco gear, industrial tools, and serial hardware that still runs on COM ports. |
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DTECH 6 Feet USB to RS422 RS485 Serial Port Converter Adapter Cable with FTDI Chip Supports Windows 11 10 8 7 XP Mac |
This USB to RS422/RS485 adapter is perfect for anyone who needs a stable, reliable connection between their PC and RS422 or RS485 devices. It’s great for industrial, automation, or data logging setups. |
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HiLetgo CP2102 USB 2.0 to TTL Module Serial Converter Adapter Module USB to TTL Downloader with Jumper Wires |
This HiLetgo CP2102 USB 2.0 to TTL Module is perfect for hobbyists, students, and professionals who need a reliable way to connect microcontrollers to their computers. It’s easy to use and works with Windows, Mac, and Linux. |
Detailed Reviews
Discover the top 10 COM Port Converters handpicked for reliability and performance. Each product is expert-reviewed and backed by customer feedback, ensuring you find the perfect fit for your needs. Whether you’re upgrading old devices or connecting modern tech, this guide makes your choice simple and confident.
1. OIKWAN USB-C to Serial Adapter, 6FT RS232 DB9 Female Converter Cable, FTDI Chip, Compatible with Windows, Mac, Linux, Type C Device, Industrial Applications, Data Communication
Upgrade your setup with the OIKWAN USB-C to Serial Adapter. It connects modern laptops to older RS232 devices with ease. Enjoy fast data transfer without extra power cords.
The FTDI chip inside guarantees high performance and stability. It works smoothly with Windows, Mac, and Linux computers. Always check that you need a DB9 female connector.
Installation is quick after a simple one-time driver download. Get standard plug and play convenience for all your gear.
| Pros | Cons |
|---|---|
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Perfect For:
This USB-C to Serial Adapter is perfect for anyone who needs to connect modern devices with older RS-232 equipment. It’s ideal for industrial applications, data communication, or working with COM ports on Windows, Mac, or Linux.
Ready to Purchase?
2. DTECH USB to RS422 RS485 Serial Port Converter Adapter Cable with FTDI Chip Supports Windows 11 10 8 7 XP Mac -1.5 Feet
The DTECH USB to RS422/RS485 Converter lets you connect devices easily to your computer. It works with Windows, Mac, and more.
It has LED indicators for troubleshooting. It offers 600W surge protection and 15KV ESD isolation.
This adapter is plug-and-play and needs no extra power. It’s reliable and works in industrial settings.
| Pros | Cons |
|---|---|
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Perfect For:
This USB to RS422/RS485 converter is perfect for anyone who needs to connect industrial devices to their computer. It’s ideal for engineers, technicians, or DIY enthusiasts working with sensitive equipment in industrial settings.
Ready to Purchase?
3. OIKWAN USB to RS485/RS422 Serial Port Converter Adapter Cable with FTDI Chip Supports Windows 11 10 8 7 XP Mac 6 Feet
The OIKWAN USB cable links your PC to RS485 gear. Data moves both ways. It fits many jobs.
It runs on Windows, Mac, Linux. Most need no driver. Old ones need a driver.
It sends data very far. You get four modes.
| Pros | Cons |
|---|---|
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Perfect For:
This USB to RS485/RS422 adapter is perfect for anyone needing to connect computers to RS-485/RS-422 devices. It’s ideal for stable, long-distance data transmission up to 1200 meters.
Ready to Purchase?
4. MAX3232 RS232 to TTL Serial Port Converter Module, DB9 Female | Compatible with Arduino, Raspberry Pi, ESP32, ESP8266 with Tutorials, 2 Pieces
The MAX3232 module changes RS232 to TTL. It fits Arduino, Raspberry Pi, ESP32, and ESP8266.
The DB9 port plugs in fast. It moves data with no fuss. Step-by-step tutorials are free to read.
You get two modules in one pack. Each one is small and easy to set up.
| Pros | Cons |
|---|---|
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Perfect For:
This converter module is perfect for DIY makers, students, and hobbyists using Arduino, Raspberry Pi, ESP32, or ESP8266. It helps anyone who needs easy serial communication between RS232 and TTL devices.
Ready to Purchase?
5. StarTech.com 3ft (1m) USB to Serial Cable, DB9 Male RS232 to USB Converter, Prolific IC, USB to Serial Adapter for PLC/Printer/Scanner/Switch, USB to COM Port Adapter, Windows/Mac (1P3FP-USB-SERIAL)
The StarTech.com USB to Serial Cable turns a USB port into a DB9 RS232 port. The 3 ft cable has a Prolific PL2303 chip inside.
Plug it into a PC or Mac with no fuss. It works with printers, scanners, PLCs, and network switches. The screw-lock nut keeps the DB9 plug tight and safe.
Data moves at up to 921.6 Kbps for fast transfers. It works with Windows, macOS, and Linux. The 3-year warranty covers your IT work.
| Pros | Cons |
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Perfect For:
This USB to Serial Cable is perfect for IT pros and anyone who needs to connect old devices to modern computers. It’s great for server rooms, factories, labs, and more.
Ready to Purchase?
6. OIKWAN USB Type C to RS232 DB9 Serial Port Adapter Cable, FTDI Chipset, Supports Windows 11, 10, 8, 7 and Mac Linux
The OIKWAN USB-C to RS232 cable connects your laptop to serial devices. It has an FTDI chip for stable data transfer.
It runs on Windows, Mac, and Linux. The DB9 plug fits common serial ports. Setup is plug and play—no power cord needed.
| Pros | Cons |
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Perfect For:
This USB-C to RS232 adapter is perfect for anyone who needs to connect older serial devices to modern USB-C laptops or PCs. It’s ideal for tech enthusiasts, IT professionals, or hobbyists working with RS232 devices like industrial equipment, routers, or legacy systems.
Ready to Purchase?
7. USBGear 12 inch USB to Serial RS-232 DB-9 Pin Adapter with FTDI Chipset for Windows 11, 10, 8, 7 and Mac Systems – Use for Laptop Serial Port, PDA, GPS, Modems, Routers and More
Upgrade your setup with this easy USB adapter. It links modern laptops to classic serial devices.
Built-in FTDI chips keep your data moving fast. Bright LED lights let you check connections in seconds.
Works with Windows and Mac. Built to last for years of use. Plug it in and start now.
| Pros | Cons |
|---|---|
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Perfect For:
The USBGear adapter is perfect for IT workers, network pros, and tech fans. You can hook up old serial devices like modems, routers, and GPS units to new laptops and computers.
Ready to Purchase?
8. OIKWAN USB-C to RS232 DB9 9pin Female Serial Cable Converter Adapter with FTDI Chipset for Windows 11,10, 8.1, 8, 7, Vista, XP, 2000, Linux and Mac OS X 10.6 (10ft)
Upgrade your tech setup fast today. This smart adapter links modern USB-C laptops to legacy serial gear. Enjoy smooth connections with zero hassle.
It features the top FTDI chip inside. You get rock-solid reliability on every job.
No extra power cords are needed. Just install the free driver and start work. Get top performance for your business now!
| Pros | Cons |
|---|---|
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Perfect For:
Perfect for IT pros, engineers, and programmers who need to link a USB-C laptop to old RS232 devices. Great for use with Cisco gear, industrial tools, and serial hardware that still runs on COM ports.
Ready to Purchase?
9. DTECH 6 Feet USB to RS422 RS485 Serial Port Converter Adapter Cable with FTDI Chip Supports Windows 11 10 8 7 XP Mac
Connect your computer to industrial devices with zero effort. This FTDI chip cable gives you a fast and rock-solid connection.
It works seamlessly with Windows and Mac systems. Built-in surge protection keeps all your expensive equipment safe.
Light indicators show live data status. Easy wiring makes setup very simple. Get reliable control today.
| Pros | Cons |
|---|---|
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Perfect For:
This USB to RS422/RS485 adapter is perfect for anyone who needs a stable, reliable connection between their PC and RS422 or RS485 devices. It’s great for industrial, automation, or data logging setups.
Ready to Purchase?
10. HiLetgo CP2102 USB 2.0 to TTL Module Serial Converter Adapter Module USB to TTL Downloader with Jumper Wires
The HiLetgo CP2102 USB 2.0 to TTL Module is a handy tool for connecting devices. It uses a stable CP2102 chipset for reliable performance. This module is easy to use for all skill levels.
It supports baud rates from 300 bps to 1.5 Mbps, making it versatile. The standard USB type A male and TTL 5-pin connector ensure simple connections.
Works with Windows, Mac OS, and Linux, so it’s compatible with most systems. Includes jumper wires for quick setup and immediate use.
| Pros | Cons |
|---|---|
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Perfect For:
This HiLetgo CP2102 USB 2.0 to TTL Module is perfect for hobbyists, students, and professionals who need a reliable way to connect microcontrollers to their computers. It’s easy to use and works with Windows, Mac, and Linux.
Ready to Purchase?
Buying Guide
Finding the right COM port converter can feel hard. Good news: this guide makes it simple. You will pick the best fit for your gear fast.
Many users say the first try was a big win. One person hooked up a vintage CNC machine in minutes. Another got a factory printer back online right away.
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Compatibility: Check that the adapter works with your computer system. Match the port type to your old device. This step stops waste of time.
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Chipset Quality: Pick a model with a good chip like FTDI or Prolific. A strong chip gives fast data and long life. Cheap chips can fail fast.
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Connector Type: Look at the DB9 pin setup on your device. Most gear uses a male or female plug. The wrong fit will not work.
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Cable Length: Measure the space between your PC and device. A short cable cuts down desk clutter. A long cable lets you place gear where you want.
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Driver Support: Make sure the adapter has drivers for your OS. Modern systems need new driver files. Some models work with no driver at all.
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Data Speed: Check the baud rate the adapter can handle. High rates move large files fast. Low rates can slow your work down.
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Build Quality: Look for strong plastic or metal shells. A solid build lasts through daily use. Thin parts break easy.
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Surge Protection: Pick a model with built-in safety features. ESD guards stop shock damage. This is key for factory settings.
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LED Lights: Some adapters have small lights that flash during use. These lights help you see if data flows. They make troubleshoot much easier.
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Price Value: Compare cost to what you get. A low price may mean low quality. A fair price gets you years of use.
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Warranty: Check if the brand offers a warranty plan. A long warranty shows the maker trusts the product. It also protects your cash.
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User Reviews: Read what other buyers say about the adapter. Real users share real pros and cons. This helps you avoid bad picks.
Your perfect COM port converter is out there. Use this guide to match your needs with the right product. Soon you will have your old gear talking to your new PC with no fuss.