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Compare Keychron J5 QMK vs K4 QMK V3 Differences Side by Side

Explore the comprehensive side-by-side comparison of the Keychron J5 QMK and Keychron K4 QMK V3 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.

73
Keychron J5 QMK Wireless Mechanical Keyboard (US ANSI Layout)
67
Keychron K4 QMK Wireless Mechanical Keyboard (Version 3)-US ANSI Layout

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  • Available in a 100% layout
  • Connects via USB-C
  • Features N-key rollover
  • Has built-in sound dampening
  • Supports Bluetooth, 2.4 GHz, Wired, Wireless connectivity
  • Runs at a 1000 Hz polling rate
  • Equipped with a 3750 mAh battery
  • Weighs about 1100 g
  • Sized at 35 x 436 x 129 mm
  • Made with a ABS case
  • Features PBT keycaps
  • Offers Yes, Rgb, White, North-face, Rgb North-face, White North-face RGB lighting
  • Available in a 96% layout
  • Made with a Aluminum case
  • Offers Yes, Rgb, White RGB lighting
Scores
  • Performance: 78.1
  • Build Quality: 61.2
  • Productivity: 84.1
  • Customizability: 75
  • Portability: 56.3
Scores
  • Performance: 61.5
  • Build Quality: 66.8
  • Productivity: 56.3
  • Customizability: 75.8
  • Portability: 43.8
Name
Keychron J5 QMK
Name
Keychron K4 QMK V3
Release year
2025
Release year
2025
Switch Options
Tactile, Linear
Switch Options
Tactile, Linear
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
100%
Layout Size
96%
Layout Standard
ANSI
Layout Standard
ANSI
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
Polling Rate
1000 Hz
Polling Rate
-
Battery capacity
3750 mAh
Battery capacity
-
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
-
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb, White, North-face
Backlight
 
Rgb, White
Case Colors
Case Colors
Case Material
ABS
Case Material
Aluminum
Keycaps Material
PBT
Keycaps Material
-
Dimensions
35 x 436 x 129 mm
Dimensions
-
Weight
1100g
Weight
-
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