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Compare Keychron J4 QMK vs K2 HE Differences Side by Side

Explore the comprehensive side-by-side comparison of the Keychron J4 QMK and Keychron K2 HE and view their biggest differences. The detailed comparison table allows you to see all the essential features, specifications, and benefits of each keyboard at a glance. Whether you're looking for performance, value, or specific functionalities, this comparison tool helps you make an informed decision.

72
Keychron J4 QMK Wireless Mechanical Keyboard (US ANSI Layout)
-20% off
99
Keychron K2 HE Wireless Magnetic Switch Custom Keyboard

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0.0 (0)
4.6 (69)
  • Released in 2025
  • Has Tactile, Linear switch options
  • Available in a 80% layout
  • Built with the ANSI layout standard
  • Weighs about 870 g
  • Sized at 38 x 366 x 138 mm
  • Made with a ABS case
  • Features PBT keycaps
  • Offers Yes, Rgb, White, North-face, Rgb North-face, White North-face RGB lighting
  • Released in 2024
  • Has Linear, Magnetic switch options
  • Available in a 75% layout
  • Built with the ANSI, ISO, ISO-UK, ISO-DE, ISO-ES, ISO-FR, ISO-CH, ISO-Nordic, JIS layout standard
  • Comes with a knob
  • Provides dedicated media keys
  • Utilizes Hall effect sensors
  • Supports VIA configuration
  • Enables rapid trigger functionality
  • Includes screw-in stabilizers
  • Uses a Tray Mount mounting style
  • Weighs about 1743 g
  • Sized at 30 x 127 x 41 mm
  • Made with a Aluminum, Wood, ABS, Resin case
  • Features PBT, ABS, PC keycaps
  • Offers Yes, Rgb, North-face, Rgb North-face, White, White North-face RGB lighting
Scores
  • Performance: 79.2
  • Build Quality: 61.2
  • Productivity: 84.6
  • Customizability: 74.7
  • Portability: 73.6
Scores
  • Performance: 93.1
  • Build Quality: 90.7
  • Productivity: 96.6
  • Customizability: 99.3
  • Portability: 80.9
Name
Keychron J4 QMK
Name
Keychron K2 HE
Release year
2025
Release year
2024
Switch Options
Tactile, Linear
Switch Options
Linear, Magnetic
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
80%
Layout Size
75%
Layout Standard
ANSI
Layout Standard
ANSI, ISO, ISO-UK, ISO-DE, ISO-ES, ISO-FR, ISO-CH, ISO-Nordic, JIS
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, 2.4 GHz, Wired, Wireless
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate
1000 Hz
Polling Rate
1000 Hz
Battery capacity
4000 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
-
Mount Style
Tray Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb, White, North-face
Backlight
 
Rgb, North-face, White
Case Colors
Case Colors
Case Material
ABS
Case Material
Aluminum, Wood, ABS, Resin
Keycaps Material
PBT
Keycaps Material
PBT, ABS, PC
Dimensions
38 x 366 x 138 mm
Dimensions
30 x 127 x 41 mm
Weight
870g
Weight
1743g
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