USB Male to Dual PS/2 Female Cable
4.8Editor score
One USB connection
Two PS/2 female ports
Passive adapter design
Requires dual-mode devices
Broad operating system support
In this guide
A PS/2 to USB adapter can give a dependable keyboard or mouse a practical path onto a modern computer that no longer includes legacy ports. The right adapter depends on connector direction, device compatibility, active or passive electronics, operating-system support, and whether you need one peripheral or both keyboard and mouse.
We compared ten adapters and cable-style converters using their supplied specifications, customer ratings, supported interfaces, installation requirements, and intended applications. The list covers dual-device adapters, single-device converters, multi-packs, KVM-oriented options, and passive adapters that require dual-compatible peripherals rather than converting every PS/2 device.
Each review explains where the product stands out, what technical limitations deserve attention, and which user it is best suited for. Ratings and specifications reflect the supplied product information, while prices can change frequently, so readers should confirm the current listing, connector orientation, and device requirements before ordering.
Top 3 Picks for Best PS2 to USB Adapter for Old Keyboard and Mouse
Perixx PERIPRO-401
4.5Editor score
Built-in USB controller
Dual color-coded PS/2 ports
Supports USB 2.0 connections
Works with KVM switches
Combines keyboard and mouse
StarTech USBPS2PC
4.6Editor score
Single USB interface
Supports keyboard and mouse
Professional adapter format
Suitable for legacy setups
Compact converter design
Top 10 Best PS2 to USB Adapter for Old Keyboard and Mouse in 2026 Compared
The comparison highlights the most important differences among these adapters, including active electronics, passive compatibility, dual-device support, connector direction, KVM use, and installation requirements.
ProductsSpecificationsEditor scorePrice
Editor's Choice
Perixx PERIPRO-401
Built-in USB controller
Dual PS/2 female
USB male connection
KVM switch support
4.5Editor score
Editor's Choice
Dual PS/2 Passive Cable
Passive signal adapter
Dual PS/2 female
USB male connection
Requires dual-mode devices
4.8Editor score
Best Premium
StarTech USBPS2PC
Single USB interface
Keyboard and mouse support
PS/2 conversion adapter
Legacy equipment focused
4.6Editor score
Four-Pack PS/2 Adapters
Four adapters included
USB female to PS/2
Built-in chip required
Not hot-swappable
4.0Editor score
Monoprice PS/2 Converter
Keyboard and mouse support
Driver-free installation
KVM extender use
PS/2-to-USB conversion
4.6Editor score
LEIHONG Active Dual Adapter
Built-in conversion chip
Dual PS/2 connectors
Linux and Windows support
Plug-and-play operation
4.4Editor score
18cm USB to PS/2 Cable
Built-in conversion chip
PS/2 female connection
USB male connection
Eighteen-centimeter cable
4.3Editor score
Four-Pack PS/2 Plugs
Four adapters included
Passive conversion design
Dual-mode device required
Not hot-swappable
4.2Editor score
VizGiz Three-Pack
Three adapters included
PS/2 female to USB
Dual compatibility required
Cold connection required
3.2Editor score
30cm Dual PS/2 Cable
Built-in chip processing
Dual PS/2 female
Hot-plug support claimed
Wide legacy OS support
4.6Editor score
1. Perixx PERIPRO-401 – Best Overall Dual-Device Adapter
Perixx PERIPRO-401
Built-in USB controller
Dual PS/2 female ports
USB 2.0 port support
KVM switch compatible
The Perixx PERIPRO-401 is a compact desktop adapter designed to connect a PS/2 keyboard and mouse through one USB port on a PC or laptop. Its supplied rating is 4.5 out of 5, and its defining feature is a built-in USB controller. Rather than depending entirely on passive signal conversion, it provides dedicated electronics for translating the two legacy inputs.
Pros
- Combines keyboard and mouse
- Uses one USB connection
- Built-in controller hardware
- Color-coded peripheral ports
- Supports KVM switch setups
Cons
- Older desktop-style form factor
- Limited to USB connection
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Two color-coded female ports make the layout easy to understand: purple is intended for the keyboard and green for the mouse. That arrangement lets users preserve a familiar desktop setup without adding a separate converter for each peripheral. The adapter connects to a USB 2.0 port, and its specifications also note support for the PS/2 side of a KVM switch, which is useful for controlled legacy equipment installations.
The tradeoff is that this is a fixed adapter rather than a long cable, so desk placement may not be ideal if the computer is distant from the keyboard and mouse. It also uses a USB-A male plug, limiting it to computers with that physical port unless another USB connection is already available. Nevertheless, the integrated controller and ability to handle two peripherals make it a well-rounded option for a conventional PS/2 desktop pair.
This is the strongest general-purpose choice for someone who wants one recognized adapter for both a legacy keyboard and mouse. It suits computer labs, workshop stations, restoration projects, and KVM arrangements where a unified connection point is more useful than a long cable. Buyers should confirm that their peripherals use standard PS/2 connectors and that the modern system has an available USB-A port.
One Adapter for Two Legacy Peripherals
The combined keyboard-and-mouse layout reduces cable clutter and avoids the need to occupy two USB ports with separate converters. Color-coded sockets also minimize the chance of connecting the devices incorrectly.
Useful for KVM and Lab Work
Support for the PS/2 port of a KVM switch makes the adapter relevant to managed setups where legacy input devices must coexist with USB computers.
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2. USB Male to Dual PS/2 Female Cable – Best Straightforward Passive Adapter
USB Male to Dual PS/2 Female Cable
Passive conversion design
Dual PS/2 female ports
USB male plug
Requires dual-mode devices
This USB-to-dual-PS/2 cable has a supplied rating of 4.8, the highest in the group, while offering a particularly simple connection method. It presents one USB male plug and two PS/2 female sockets, allowing one keyboard and one mouse to connect through a single USB port. The purple and green socket colors follow the familiar legacy convention.
Pros
- Highest supplied rating
- Connects two legacy devices
- Color-coded keyboard and mouse ports
- No installation software
- Works with major operating systems
Cons
- Will not convert PS/2-only devices
- Passive design limits compatibility
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Its most important qualification is stated directly in the product data: this is a passive adapter. It does not perform the full active conversion required by many PS/2-only peripherals. Instead, it works with devices that support both USB and PS/2 protocols and can communicate through both interfaces. That makes it a simple wiring solution for modern USB input equipment, rather than a universal rescue tool for every older keyboard or mouse.
The adapter supports most standard USB keyboard and mouse devices across Windows, Linux, and other compatible systems, with no special software mentioned. Its limitation is more substantial than a missing cable length or casing detail, though: a PS/2-only peripheral may not function through this passive unit. Confirming the keyboard or mouse manual for dual-mode support is essential before purchase.
Choose this cable when you already know both peripherals support USB and PS/2 and want a low-complexity adapter for a home or office system. It is especially effective for legacy equipment that originally shipped with a USB-to-PS/2 adapter. For genuinely PS/2-only devices, choose an option with a built-in conversion chip instead.
A Clear Two-Peripheral Layout
The separate purple and green PS/2 sockets make it easy to identify the correct keyboard and mouse connections while keeping both devices attached to one USB plug.
Understand the Passive Limitation
Passive signal sharing is useful only when the connected peripherals already support both protocols. Devices designed exclusively for PS/2 need an adapter containing active conversion electronics.
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3. StarTech USBPS2PC – Best Professional-Style Converter
StarTech USBPS2PC
Single USB interface
Keyboard or mouse support
PS/2 converter format
Legacy equipment focused
The StarTech USBPS2PC is a dedicated USB-to-PS/2 converter with a supplied rating of 4.6. Its stated purpose is to combine a PS/2 keyboard and mouse with one USB interface, making it a practical choice for specialized equipment, older systems being modernized, or installations where keeping a dependable input setup is important.
Pros
- Established specialist adapter
- Supports keyboard and mouse
- Uses one USB interface
- Suitable for specialty peripherals
- Simple connection method
Cons
- No detailed cable length
- Product data is concise
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The product is explicitly identified as both a keyboard adapter and a mouse adapter, so users are not limited to one peripheral type. It occupies only one USB interface, which can be valuable on compact computers, laptops, and modern desktops with a limited number of free ports. The straightforward converter format also suits anyone who wants a recognizable specialist solution rather than a multi-piece set of loose plugs.
The supplied product information is concise and does not list a specific operating-system matrix, driver behavior, or detailed connection protocol. As a result, the safest buying approach is to confirm the relevant device and computer requirements from the current listing. Another drawback is that its compact adapter format may provide less cable routing flexibility than a longer cable-style converter.
This is a strong option for a user who values a focused USB-to-PS/2 converter and needs either a keyboard or mouse. It is particularly compelling for specialty input equipment and controlled setups where keeping legacy peripherals in service is the priority. Make sure the USB and PS/2 connector orientations fit the physical arrangement of your equipment before ordering.
Purpose-Built Legacy Support
The StarTech adapter is designed specifically around the challenge of connecting legacy PS/2 input devices through USB, which makes it relevant to specialist peripherals and controlled installations.
Consolidates Computer Connections
Using one USB interface for the conversion reduces the number of occupied computer ports and keeps the connection arrangement straightforward.
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4. Four-Pack PS/2 Adapters – Best Multi-Pack Value
Four-Pack PS/2 Adapters
Four adapters included
Built-in chip compatibility
USB female to PS/2
Driver-free installation
This four-pack provides a practical choice for offices, repair benches, or homes with several older input devices. It has a supplied rating of 4.0 and includes four compact adapters in two colors. Each unit presents a USB female side and a PS/2 male connection, allowing a USB keyboard or mouse to be adapted to a computer with a limited or inconvenient port arrangement.
Pros
- Four adapters in one set
- Two color options
- No software installation
- Works with most PS/2 devices
- Useful for multiple systems
Cons
- Not hot-swappable
- Requires built-in converter chips
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The package specifications state that only mice or keyboards with built-in chip converters will work. The adapters are driver-free and use a plug-and-play design, but compatibility depends on the device's electronics. Their other important limitation is that they are not hot-swappable. The instructions call for powering down the computer, connecting the adapter, and restarting after installation.
A full set of four is useful when an administrator wants spare converters for several machines or for both keyboard and mouse connections. However, these are directional adapters rather than a cable with two PS/2 inputs. Users need to pay close attention to the male and female connector descriptions, because the physical arrangement differs from the dual-port products in this list.
This set is best for people managing several compatible USB input devices that need PS/2 connections, or for anyone who prefers keeping spare adapters on hand. Check the peripheral manual for the required chip converter and follow the cold-connection procedure. It is less suitable for hot-plugging or for peripherals without the appropriate internal support.
Useful Spares for Multiple Systems
Four units allow the same conversion solution to be kept across several workstations, repair kits, or separate keyboard-and-mouse arrangements without ordering individual adapters.
Plan for a Power Cycle
Because hot-swapping is not supported, the computer should be turned off before the adapter is connected and restarted afterward for reliable recognition.
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5. Monoprice PS/2 Converter – Best Driver-Free Legacy Solution
Monoprice PS/2 Converter
PS/2-to-USB conversion
Keyboard and mouse support
Driver-free operation
KVM extender use
The Monoprice PS/2 Keyboard/Mouse to USB Converter has a supplied rating of 4.6 and focuses on a simple goal: making older input devices useful when a computer lacks native PS/2 ports. Its stated use case includes specialty keyboards and mice, which may be the deciding factor for users who cannot replace a favored or specialized peripheral.
Pros
- No software or special drivers
- Supports specialty peripherals
- Works with USB KVMs
- Simple installation
- Compact black adapter
Cons
- KVM extender requires support
- Specific feature details limited
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No software or special drivers are required, so the setup can remain uncomplicated. The product is also useful in a KVM extender situation where PS/2 keyboards and mice need to operate with USB KVMs. This gives the adapter relevance beyond a one-computer desktop, particularly for users who maintain older control rooms, workstations, or shared installations.
The supplied information does not detail the number of PS/2 sockets, connector direction, cable arrangement, or supported operating systems. Those details should be checked on the current listing and compared with the user's actual devices. KVM extender compatibility also depends on the KVM hardware and its own supported protocols, so it should not be treated as universal.
This converter is a strong choice for a specialty peripheral owner who needs a simple path from PS/2 to USB and wants to avoid driver installation. It is also useful in compatible USB KVM arrangements. Users should verify connector layout and KVM requirements, but anyone who values straightforward legacy support and a strong supplied rating will find the core proposition appealing.
No Drivers to Troubleshoot
The adapter requires no software or special drivers, making it useful in controlled environments where installing additional utilities would be inconvenient.
Extends Specialized KVM Setups
Its compatibility with PS/2 devices used through USB KVMs can help organizations preserve established input equipment while updating the host computer.
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6. LEIHONG Active Dual Adapter – Best Feature-Rich Active Cable
LEIHONG Active Dual Adapter
Built-in USB chip
Dual PS/2 connections
Linux and Windows support
Plug-and-play operation
The LEIHONG active dual adapter is presented as a way to reuse older keyboards and mice on computers that support only USB. It has a supplied rating of 4.4 and includes built-in electronics, which is the key technical distinction from passive adapters. The product information emphasizes that it can work with very old keyboards and can be used with a full PS/2 KVM setup.
Pros
- Active conversion electronics
- Supports old keyboards
- Connects keyboard and mouse
- Works with KVM cables
- No configuration required
Cons
- Cable length not specified
- Older platform support only
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A keyboard and mouse can both connect to the unit, and the built-in chip handles the conversion before the signal reaches the computer. The listed platform support includes Linux and Windows. Users report in the supplied description that the devices are recognized after boot and that the arrangement works without lag, although the guide does not claim independent hands-on testing.
The adapter is described as rugged, with a solid fit and a block in the middle of the cable. That is encouraging for a frequently handled connection point. On the other hand, the product data does not provide a definite cable length, detailed operating-system versions, or a formal list of compatible device chips, so buyers with specialized equipment should verify those points before purchasing.
This is a good match for someone reviving a favorite mechanical or older keyboard that has a standard PS/2 plug, particularly when a USB KVM is already part of the setup. Its active chip makes it more practical than a passive unit for older peripherals. The combination of dual-device support, straightforward setup, and KVM relevance gives it broad appeal.
Active Electronics for Older Gear
The built-in conversion chip allows the adapter to translate signals from older PS/2 devices rather than relying on the peripheral to speak both protocols.
Simple Reuse of Favorite Keyboards
The adapter can extend the useful life of a preferred older keyboard while avoiding the need to replace a device that still provides a good working experience.
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7. 18cm USB to PS/2 Cable – Best Compact Single-Device Cable
18cm USB to PS/2 Cable
Built-in performance chip
PS/2 female connection
USB male connection
Eighteen-centimeter length
The 18cm USB-to-PS/2 converter cable is a compact solution for connecting a legacy keyboard or mouse to a computer with only USB. It has a supplied rating of 4.3 and includes a built-in chip intended to provide stable signal transmission. The product information describes it as suitable for keyboards, mice, and PS/2 barcode scanners.
Pros
- Compact 18cm cable
- Built-in conversion chip
- No driver installation
- Supports keyboard and mouse
- Durable PVC construction
Cons
- Short for distant equipment
- Single-device cable design
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Its USB male and PS/2 female ends make the connection direction easy to understand: the cable plugs into the computer and accepts a standard legacy peripheral. Because the conversion electronics are built in, it is not simply a passive plug or a basic wire adapter. Installation is described as plug-and-play without driver installation, helping keep the setup simple.
The cable is made from PVC with an oxygen-free copper core, according to the supplied data. The main limitation is its short length. Eighteen centimeters may be adequate when the computer and peripheral sit close together, but it can be restrictive in a workstation where the keyboard is positioned farther from the host. It also appears designed for one PS/2 device rather than a dual keyboard-and-mouse arrangement.
This is a practical choice for a compact setup, repair bench, or nearby legacy machine where short cable routing is desirable. It can also serve barcode-scanner users with compatible PS/2 equipment. For desks requiring more reach or for a keyboard and mouse used simultaneously, choose a longer dual-port cable instead.
Stable Active Signal Conversion
A built-in performance chip translates the PS/2 signal and is described as supporting lag-free or delay-free operation during normal use.
More Than a Basic Keyboard
Compatibility with PS/2 barcode scanners broadens the cable's usefulness for business equipment and specialized legacy peripherals.
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8. Four-Pack PS/2 Plugs – Best Spare Set for Dual-Mode Gear
Four-Pack PS/2 Plugs
Four passive adapters
PS/2 male to USB
Requires dual-mode support
Driver-free installation
This four-pack consists of PS/2 male-to-USB-A female adapters intended as simple replacements or converters for compatible input devices. It carries a supplied rating of 4.2 and includes four units. Each adapter can be used with a mouse or keyboard, making the pack convenient for multiple machines or for keeping replacement parts available.
Pros
- Four adapters included
- Useful replacement plugs
- No software installation
- Supports keyboard and mouse
- Simple physical connection
Cons
- Requires dual-mode peripherals
- No hot-plug support
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The crucial restriction is clearly identified in the product information: these adapters lack a conversion chip. They therefore work only with keyboards and mice that support dual modes. Newer wired gaming mice, illuminated keyboards, and other peripherals that do not natively support PS/2 may not work correctly, even if their connectors appear similar.
Installation does not require a software driver, but the units are not hot-swappable. Users should turn off the computer, connect the adapter and peripheral, and then power the computer back on. The product information also notes that an unresponsive middle mouse button may be resolved by restarting, which is consistent with the required cold-connection procedure.
The set is best for owners of older dual-compatible equipment or for administrators maintaining several systems with matching input devices. Its small adapter format also makes it easy to carry as a spare. Buyers should not select it for an expensive modern gaming keyboard or mouse unless the device documentation explicitly confirms PS/2 support.
Understand the Missing Conversion Chip
Without active conversion electronics, the adapters depend on the peripheral itself to support both PS/2 and USB protocols, which sharply narrows the compatible device list.
Useful as Maintenance Spares
Four interchangeable plugs are useful for a repair bench, IT cabinet, or collection of workstations that use compatible legacy input devices.
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9. VizGiz Three-Pack – Best Adapter for Originally Dual-Supported Devices
VizGiz Three-Pack
Three adapters included
PS/2 female to USB
Dual-mode requirement
Cold connection procedure
The VizGiz three-pack is a set of PS/2 female-to-USB male adapters intended for legacy keyboards, mice, and trackballs that were originally supplied with both connection methods. Its supplied rating of 3.2 is the lowest among the products here, so it should be considered a specialized choice rather than a broadly recommended solution.
Pros
- Three adapters included
- Supports legacy trackballs
- Useful for KVM switches
- Simple USB connection
- Compact replacement format
Cons
- Lowest supplied rating
- Only supports dual-compatible devices
- No hot-plugging
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The product information makes the compatibility requirement unusually clear: the keyboard must be dual-compatible and should have originally shipped with a PS/2-to-USB adapter. It also notes that the connected device must be USB compatible. This is a narrower proposition than an active converter because the peripheral, rather than the adapter, provides the protocol support.
Because the PS/2 interface does not support hot-plugging, the instructions say to turn the computer off, connect the adapter, and start the computer again. The set includes three units, which may be useful for a keyboard, mouse, and trackball or for maintaining a few systems. Its compact plug format is easy to store and install.
This pack makes sense for a user who has located the original adapter for a supported peripheral or can positively confirm dual-mode support. It is not a good choice for an arbitrary PS/2-only keyboard, and its lower supplied rating suggests more uncertainty or less consistency than the leading options. Checking the manufacturer documentation is essential.
Best for Known Dual-Compatible Peripherals
The original-cable test is a useful confidence check: if the keyboard or trackball previously shipped with a PS/2-to-USB adapter, this replacement is more likely to match its supported protocols.
Legacy Peripherals Still Have Value
A familiar trackball, specialized mouse, or older keyboard can remain useful when its protocol support matches the adapter, reducing the need to replace working equipment.
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10. 30cm Dual PS/2 Cable – Best Cable for Older Operating Systems
30cm Dual PS/2 Cable
Built-in chip processing
Dual PS/2 female
Hot-plug support claimed
Legacy Windows support
The 30cm USB male-to-dual-PS/2 female Y cable is aimed at combining one keyboard and one mouse through a single USB port. It has a supplied rating of 4.6 and includes built-in chip processing. The product information says that the two PS/2 outputs are freely interchangeable and can support multimedia keyboards as well as standard mice.
Pros
- Connects keyboard and mouse
- Thirty-centimeter cable
- Built-in signal processing
- Hot-plugging support claimed
- Broad legacy OS list
Cons
- Older operating-system focus
- Single cable in package
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One notable feature is the claim that it supports hot-plugging, unlike several passive or non-hot-swappable alternatives in this roundup. It also follows the USB 1.1 full-speed standard and supports a broad list of older Windows versions and Linux. That makes the cable particularly interesting for retro-computer projects, restored systems, and installations using operating systems that predate modern USB handling.
The fixed 30cm length is short for a full-size desk setup, so the cable may work best when the host and peripherals are close together. It also includes only one cable, unlike the three- and four-packs in the list. The stated operating-system support is extensive for older platforms, but users on current systems should still confirm that their version of Linux or Windows recognizes the adapter normally.
Choose this cable when reviving an older computer, matching it to legacy peripherals, or needing one USB connection for both input devices. Its chip processing, claimed hot-plug behavior, and explicit legacy OS support distinguish it from basic passive adapters. For a modern full-size workstation, the short reach is the main practical limitation.
Built for Retro Computer Projects
Support for Windows 98, ME, 2000, XP, Vista, 7, 8, 8.1, and Linux makes the cable relevant to retro hardware and operating-system restoration projects.
One Cable for Two Peripherals
The Y-style arrangement lets a keyboard and mouse share one USB plug, which is especially helpful on retro systems with a small number of available ports.
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Buying Guide – How to Choose the Best PS2 to USB Adapter for Old Keyboard and Mouse
The most important choice is whether the adapter contains active conversion electronics, because that determines whether it can operate with a true PS/2-only device. Connector direction, device count, system age, and installation procedure then narrow the field further.
Active Chip Versus Passive Adapter
An active adapter contains electronics that translate signals between the legacy PS/2 device and the modern USB connection. This is the safest choice for an older keyboard or mouse whose documentation says it is PS/2-only. A passive adapter generally expects the peripheral itself to support both protocols, so it may not recognize, power, or communicate properly with a basic PS/2 device. The supplied descriptions of the LEIHONG, 18cm, and 30cm products explicitly mention built-in chips, while the four-pack and VizGiz options warn that compatible internal electronics are required.
Connector Direction and Physical Fit
A PS/2-to-USB adapter normally has a PS/2 female end that accepts the keyboard or mouse cable and a USB male plug that enters the computer. Some products in this category do the reverse, presenting a USB female end and a PS/2 male plug so a modern USB peripheral can use a native PS/2 port. The multi-pack options are especially important to distinguish correctly. Check the shape and direction of both ends, the number of free USB-A ports, and the physical distance between the computer and peripheral before selecting a compact plug or short cable.
One Device or a Keyboard-and-Mouse Pair
A single-device converter is adequate when only one keyboard or mouse needs access to a modern computer. A dual-PS/2 adapter is more convenient for a complete legacy desktop setup because it combines both peripherals on one USB connection. The Perixx PERIPRO-401, dual passive cable, LEIHONG adapter, and 30cm Y cable all provide two legacy input sockets. A compact single converter may be better when desk space, portability, or one specialized peripheral is the priority.
Operating-System and Legacy Platform Support
Modern operating systems generally recognize standard USB keyboard and mouse devices, but legacy platforms can place greater demands on the converter and its firmware. The 30cm cable is specifically listed for older Windows releases through Windows 8.1 and Linux, while the passive dual cable lists Windows, Linux, and other systems supporting standard USB input devices. The LEIHONG option is also described as working with Windows and Linux. Check your exact operating-system version, especially for a restored vintage machine or industrial terminal, rather than relying only on broad platform language.
Hot-Plugging and Connection Procedure
Connection behavior varies significantly across the list. The 30cm Y cable claims hot-plug support, while the four-pack adapters and the VizGiz set explicitly require the computer to be turned off before connection. A cold connection is safer whenever the manufacturer instructs it and can prevent an unrecognized device or an unresponsive middle mouse button. If an adapter fails to appear, restart the system after connecting it rather than repeatedly unplugging it, and consult the product instructions for the correct startup sequence.
KVM Switch and Extender Use
If the adapter will sit between a legacy peripheral and a KVM switch, compatibility becomes more important than simple connector fit. The Perixx supports the PS/2 port of a KVM switch, the Monoprice converter is described as useful with USB KVM extenders, and the LEIHONG cable is described as usable with a full PS/2 KVM setup. Confirm whether the KVM expects a PS/2 console, a USB console, or supports both. The adapter and KVM must agree on the interface and protocol at each stage of the connection.
Cable Length and Port Placement
Cable length determines how neatly the adapter can sit between the host and peripherals. The 18cm model is optimized for close-range use, and the 30cm dual cable is also relatively short. Compact plug-style products consume less space but offer little routing flexibility, while a longer lead may be needed when the computer is positioned away from the keyboard. Consider the length, connector bulk, strain relief, and whether the adapter block prevents the peripheral cable from sitting at an awkward angle.
Keyboard and Mouse Features
A basic keyboard or mouse may work with little more than correct protocol support, but specialized features can expose compatibility gaps. Multimedia keys, illuminated controls, scrolling wheels, the middle mouse button, and trackball functions should be tested after installation. The supplied 18cm product mentions support for PS/2 barcode scanners, and the 30cm cable mentions multimedia keyboards. Verify the specific feature that matters to you, since electrical connection does not always guarantee that every function is recognized.
How to Use and Care for Your PS2 to USB Adapter for Old Keyboard and Mouse
Begin by identifying the adapter's direction and the type of peripheral it supports. A PS/2 female socket normally accepts the plug from an old keyboard or mouse, while the USB male end plugs into the computer. Dual-device adapters have separate purple and green sockets. If the product converts a modern USB peripheral to PS/2 instead, the arrangement is reversed. Reading the labels and comparing the connectors with the cables prevents an incorrect installation.
For adapters that do not support hot-plugging, shut down the computer fully, connect the adapter, and attach the keyboard, mouse, or both. Then start the computer and allow the operating system to detect the USB input devices. If the product requires drivers or a restart after a cold connection, follow those instructions. For hot-plug-capable models, the connection can generally be made while the computer is running, although restarting remains a useful troubleshooting step.
Care for the adapter by avoiding sharp bends, forceful insertion, and exposure to moisture or extreme heat. Do not unplug a PS/2 connection while the system is actively using it, particularly if the manufacturer warns against hot-plugging. Check that the plug seats fully and that the peripheral cable is not carrying strain. If a mouse button becomes unresponsive or a keyboard is not recognized, power down, reseat the connections, and restart rather than repeatedly changing ports.
Frequently Asked Questions
Can a PS/2 to USB adapter make any old keyboard work?
No. A true PS/2-only keyboard generally needs an adapter with active conversion electronics, while a passive adapter requires a device that supports both PS/2 and USB protocols. Check the keyboard manual for dual-mode support or an original USB-to-PS/2 cable before choosing a passive option.
What is the difference between an active and passive PS/2 to USB adapter?
An active adapter includes a chip that translates the legacy device's signals for the USB host. A passive adapter does less and depends on the keyboard or mouse already supporting both interfaces. Active conversion is the safer choice for older equipment that was designed exclusively for PS/2.
Can one adapter connect both a keyboard and a mouse?
Yes, if it has two PS/2 female sockets, commonly colored purple for the keyboard and green for the mouse. The Perixx PERIPRO-401, LEIHONG active adapter, 30cm Y cable, and passive dual cable all support this arrangement through one USB connection.
Will a PS/2 to USB adapter support the middle mouse button?
Basic pointer and button operation should be the priority, but specialized functions can depend on the adapter and peripheral electronics. Some products specifically mention restarting if the middle button is unresponsive. Confirm compatibility in the listings and test the button after a clean connection and restart.
Do these adapters work with laptops that lack PS/2 ports?
They are intended for computers and laptops with USB connections, using a USB male plug to connect to the host. The host must have a compatible USB-A port and an operating system that supports USB keyboard and mouse devices.
Can I plug the adapter in while the computer is running?
That depends on the model. The 30cm dual cable claims hot-plug support, but several other products explicitly require the computer to be turned off before connection. Always follow the instructions for the specific adapter, and restart the computer after connecting one that is not hot-swappable.
Will a PS/2 to USB adapter work with a KVM switch?
It can, but the interfaces must line up. Some products support the PS/2 port of a KVM switch or are designed for PS/2 devices used with USB KVMs. Confirm the console input type supported by the KVM and whether it expects a keyboard, mouse, or combined PS/2 connection.
Are passive adapters suitable for modern gaming keyboards and mice?
Often not. The supplied compatibility notices for the passive options warn that many newer wired gaming mice and illuminated keyboards do not support PS/2, even when they use related connector shapes. Look for an active adapter with built-in conversion electronics when using modern specialized equipment.
Final Thoughts on Choosing the Best PS2 to USB Adapter for Old Keyboard and Mouse
The Perixx PERIPRO-401 is the most balanced overall option because its built-in controller, dual PS/2 sockets, USB 2.0 support, and KVM compatibility handle a complete legacy input set through one connection. The passive USB-to-dual-PS/2 cable earns the budget-oriented distinction for users with confirmed dual-mode devices, while the StarTech USBPS2PC is a focused professional-style converter for legacy peripherals.
Prioritize the active chip requirement above all else if your keyboard or mouse is truly PS/2-only. Next, match the connector direction, number of peripherals, operating system, and physical layout to your setup. Active options such as the LEIHONG adapter, 18cm converter, and 30cm Y cable are particularly relevant when reviving older or specialized equipment, while passive adapters should be reserved for peripherals that explicitly support both protocols.
Finally, review the current listing before purchasing because product specifications, available variants, customer feedback, and prices can change. Confirm the connector orientation, device requirements, hot-plugging instructions, and computer support. With those details verified, a suitable adapter can preserve the keyboard or mouse you know well without asking you to abandon it for newer hardware.