Compare Keychron J1 vs J4 QMK Differences Side by Side

Explore the comprehensive side-by-side comparison of the Keychron J1 and Keychron J4 QMK 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.

Model
	82	72	Select a keyboard to compare
Rating	3.0 stars (5 reviews)	0.0 stars (0 reviews)
Purchase Options
Main differences	Has Linear, Tactile, Clicky switch options Features a low-profile design Available in a 75% layout Supports VIA configuration Equipped with a 2000 mAh battery Weighs about 661 g Sized at 23 x 327 x 144 mm	Available in a 80% layout Equipped with a 4000 mAh battery Weighs about 870 g Sized at 38 x 366 x 138 mm
Score	Scores Performance: 81.5 Build Quality: 71.1 Productivity: 89 Customizability: 86.6 Portability: 79.8	Scores Performance: 79.1 Build Quality: 60.8 Productivity: 84.5 Customizability: 74.6 Portability: 73.5
Name	Name Keychron J1	Name Keychron J4 QMK
Release year	Release year 2025	Release year 2025
Switch Options	Switch Options Linear, Tactile, Clicky	Switch Options -
Profile	Profile Low Profile	Profile Normal Profile
Hot Swappable	Hot Swappable	Hot Swappable
Layout Size	Layout Size 75%	Layout Size 80%
Layout Standard	Layout Standard ANSI	Layout Standard ANSI
Layout Ergonomics	Layout Ergonomics Normal	Layout Ergonomics Normal
Knob Support	Knob Support	Knob Support
Display Support	Display Support	Display Support
Mac/Win Support	Mac/Win Support	Mac/Win Support
Multi-Media Keys	Multi-Media Keys	Multi-Media Keys
USB-C	USB-C	USB-C
USB passthrough	USB passthrough	USB passthrough
Connection	Connection Bluetooth, 2.4 GHz, Wired, Wireless	Connection Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate	Polling Rate 1000 Hz	Polling Rate 1000 Hz
Battery capacity	Battery capacity 2000 mAh	Battery capacity 4000 mAh
Hall Effect Support	Hall Effect Support	Hall Effect Support
QMK Support	QMK Support	QMK Support
VIA Support	VIA Support	VIA Support
VIAL Support	VIAL Support	VIAL Support
N-Key Rollover	N-Key Rollover	N-Key Rollover
Rapid Trigger	Rapid Trigger	Rapid Trigger
Mount Style	Mount Style -	Mount Style -
Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers
Sound Dampening	Sound Dampening	Sound Dampening
Backlight	Backlight Rgb, White, North-face	Backlight Rgb, White, North-face
Case Colors	Case Colors	Case Colors
Case Material	Case Material ABS	Case Material ABS
Keycaps Material	Keycaps Material PBT	Keycaps Material PBT
Dimensions	Dimensions 23 x 327 x 144 mm	Dimensions 38 x 366 x 138 mm
Weight	Weight 661g	Weight 870g