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Compare Keychron K3 V2 vs K4 Pro Differences Side by Side

This comparison is for buyers deciding between Keychron's ultra-slim 75% K3 V2 and its full-featured 96% K4 Pro. The decision is hard because both are wireless, hot-swappable keyboards from the same brand, but they target very different needs. The K3 V2 prioritizes a slim, lightweight design for travel and desk space, while the K4 Pro offers a numpad, QMK/VIA programability, and a larger battery. Your choice will hinge on whether you value portability or a full layout with deep customization.

68
Keychron K3 Ultra-slim Wireless Mechanical Keyboard (Version 2)
92
Keychron K4 Pro QMK/VIA Wireless Mechanical Keyboard

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3.5 (9403)
4.7 (7)
  • Released in 2020
  • Features a low-profile design
  • Available in a 75% layout
  • Built with the ANSI, JIS, ISO, ISO-Nordic, ISO-UK, ISO-DE, ISO-ES layout standard
  • Equipped with a 1550 mAh battery
  • Made with a Aluminum, Plastic case
  • Features ABS keycaps
  • Offers Yes, Rgb, White, North-face, Rgb North-face, White North-face RGB lighting
  • Released in 2022
  • Available in a 96% layout
  • Built with the ANSI, ISO, ISO-DE, ISO-ES, ISO-FR, ISO-Nordic, ISO-SW, ISO-UK layout standard
  • Supports QMK firmware
  • Supports VIA configuration
  • Features N-key rollover
  • Includes screw-in stabilizers
  • Has built-in sound dampening
  • Runs at a 1000 Hz polling rate
  • Equipped with a 4000 mAh battery
  • Weighs about 1280 g
  • Sized at 31 x 391 x 139 mm
  • Made with a Plastic, ABS case
  • Features PBT, ABS keycaps
  • Offers Yes, Rgb, White, South-face, Rgb South-face, White South-face RGB lighting
Scores
  • Performance: 61
  • Build Quality: 66.6
  • Productivity: 65.7
  • Customizability: 67.5
  • Portability: 77.5
Scores
  • Performance: 81.3
  • Build Quality: 83.9
  • Productivity: 94.7
  • Customizability: 97.2
  • Portability: 53.6
Name
Keychron K3 V2
Name
Keychron K4 Pro
Release year
2020
Release year
2022
Switch Options
Linear, Tactile, Clicky
Switch Options
Linear, Tactile, Clicky
Profile
Low Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
75%
Layout Size
96%
Layout Standard
ANSI, JIS, ISO, ISO-Nordic, ISO-UK, ISO-DE, ISO-ES
Layout Standard
ANSI, ISO, ISO-DE, ISO-ES, ISO-FR, ISO-Nordic, ISO-SW, ISO-UK
Layout Ergonomics
Normal
Layout Ergonomics
Normal
Knob Support
 
Knob Support
 
Display Support
 
Display Support
 
Mac/Win Support
 
Mac/Win Support
 
Multi-Media Keys
 
Multi-Media Keys
 
USB-C
 
USB-C
 
USB passthrough
 
USB passthrough
 
Connection
Bluetooth, Wired, Wireless
Connection
Bluetooth, Wired, Wireless
Polling Rate
-
Polling Rate
1000 Hz
Battery capacity
1550 mAh
Battery capacity
4000 mAh
Hall Effect Support
 
Hall Effect Support
 
QMK Support
 
QMK Support
 
VIA Support
 
VIA Support
 
VIAL Support
 
VIAL Support
 
N-Key Rollover
 
N-Key Rollover
 
Rapid Trigger
 
Rapid Trigger
 
Mount Style
Tray Mount
Mount Style
Tray Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb, White, North-face
Backlight
 
Rgb, White, South-face, White South-face
Case Colors
Case Colors
Case Material
Aluminum, Plastic
Case Material
Plastic, ABS
Keycaps Material
ABS
Keycaps Material
PBT, ABS
Dimensions
-
Dimensions
31 x 391 x 139 mm
Weight
-
Weight
1280g
*Something incorrect or missing? Please
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Pros and Trade-offs

If your workspace demands a compact, easily portable keyboard, the Keychron K3 V2 is the clear choice with its slim profile and lighter build. However, if you need a numpad, programable firmware like QMK/VIA, or a larger battery for all-day use, the Keychron K4 Pro offers far more features and flexibility. The K4 Pro is the more versatile and customizable keyboard for power users, while the K3 V2 excels in portability and minimalism.

Keychron K3 V2

  • +Ultra-slim design with low profile switches is 40% slimmer than conventional switches.
  • +75% layout saves significant desk space and is lighter for travel.
  • +Features a streamlined aluminum body offering a premium feel at a lower weight.
  • +Bluetooth 5.1 provides reliable wireless connectivity for up to 3 devices.
  • −Lacks QMK/VIA support limiting software-level key remapping and macro creation.
  • −Optical switches are not compatible with standard MX mechanical switches.
  • −Smaller 1550mAh battery has lower capacity compared to the K4 Pro's 4000mAh battery.

Keychron K4 Pro

  • +Full QMK and VIA support enables deep programability via the Keychron Launcher web app.
  • +96% layout includes a numpad for data entry without requiring a full-size keyboard.
  • +4000mAh battery provides significantly longer wireless run time.
  • +Features screw-in PCB stabilizers and sound dampening foam for an upgraded typing experience.
  • +Hot-swappable PCB accepts almost all 3pin and 5pin MX style mechanical switches.
  • −Heavier and larger than the K3 V2, making it less ideal for frequent travel.
  • −Low customer review count (7 reviews) makes long-term reliability less certain.
  • −Some early units had reported PCB defects (numpad zero key issue) requiring replacement.

Which Keyboard Is Better for Your Needs?

The Keychron K4 Pro wins in five of six categories due to its programable firmware, full-size layout, and gaming-ready 1000 Hz polling rate. The K3 V2 only takes the Travel category, leveraging its ultra-slim low profile construction and lighter design. For office, programming, and content creation, the K4 Pro's numpad and deep customization provide clear advantages. The K3 V2 remains the better choice for users who frequently move their workstation and need a compact, slim keyboard.

GamingKeychron K4 Pro
  • •The K4 Pro has a 1000 Hz polling rate which is preferable for gaming responsiveness.
  • •The K4 Pro includes sound dampening foam and a steel plate for a more stable typing feel.
OfficeKeychron K4 Pro
  • •The K4 Pro provides a 96% layout with a dedicated numpad for data entry tasks.
  • •It offers three levels of adjustable typing angle (3°, 7° & 10°) for ergonomic support.
  • •Sound dampening foam and silicone bottom pad contribute to a quieter typing experience.
ProgrammingKeychron K4 Pro
  • •Full QMK and VIA support allows for custom keymaps, macros, and shortcuts.
  • •The K4 Pro can be programmed via the Keychron Launcher web app for extensive customization.
TravelKeychron K3 V2
  • •The K3 V2 is designed with a low profile, described as 40% slimmer than conventional switches.
  • •It has an aluminum body and is marketed as one of the thinnest and lightest wireless mechanical keyboards.
  • •A travel pouch is listed as an add-on accessory, indicating suitability for carrying.
ModdingKeychron K4 Pro
  • •Accepts almost all 3pin and 5pin MX style mechanical switches, offering wide compatibility.
  • •Features screw-in PCB stabilizers which are a preferred upgrade for modders.
  • •Available as a barebones kit for users who want to source their own switches and keycaps.
  • •QMK/VIA firmware allows for deep software-level customization.
Content CreationKeychron K4 Pro
  • •The full 96% layout with a numpad speeds up numerical data entry in editing software.
  • •QMK/VIA support enables custom macros for complex editing workflows.

Frequently Asked Questions (FAQ)

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