What connectivity options does the Keychron J4 offer?

The Keychron J4 provides versatile connectivity options including 2.4 GHz wireless, Bluetooth, and a wired USB connection. This allows you to easily switch between devices or choose the connection method that best suits your needs.

Can I customize the key functions or create macros on this keyboard?

Yes, the Keychron J4 supports advanced customization through the Keychron Launcher web app. You can remap any key, assign macro commands, and tailor the keyboard layout to boost your productivity or gaming experience.

Is the Keychron J4 compatible with both Windows and Mac operating systems?

Absolutely. The keyboard is designed to work seamlessly with multiple operating systems including Windows and Mac. It includes keycaps and shortcuts optimized for both, ensuring a smooth user experience regardless of your platform.

What does it mean that the keyboard is hot-swappable?

If you have the hot-swappable version of the Keychron J4, it means you can easily replace mechanical switches without soldering. This feature allows you to customize typing feel or repair switches simply by pulling them out and inserting new ones.

What layout does this keyboard use?

The Keychron J4 features an 80% Tenkeyless (TKL) layout, which provides a compact design by omitting the number pad while retaining all essential keys. This layout is ideal for saving desk space without sacrificing functionality.

How long does the battery last on wireless mode?

While the exact battery life can vary depending on usage and backlighting settings, the Keychron J4 is designed to offer several hours of continuous use on wireless mode, making it reliable for daily work or gaming sessions.

Can I use the keyboard while charging?

Yes, the Keychron J4 supports wired connection via USB, so you can continue typing or gaming while charging the battery. This ensures uninterrupted use regardless of battery level.

Are the keycaps on the J4 durable and comfortable to type on?

The keyboard comes equipped with high-quality keycaps that provide a satisfying typing experience. They are designed for durability and comfort, making them suitable for extended typing sessions.

Does the keyboard support multi-device pairing?

Yes, through Bluetooth connectivity, the keyboard can pair with multiple devices. You can quickly switch between paired devices, enhancing productivity for users who work across laptops, tablets, or smartphones.

Is it possible to update the firmware on this keyboard?

The Keychron J4 supports firmware updates, allowing you to benefit from the latest features, improvements, and bug fixes. Updates can be managed through the Keychron Launcher app or the official support channels.

Keychron J4 QMK Starting at $97.99

Name: Keychron J4 QMK
Brand: Keychron
SKU: keychron-j4-qmk-wireless-mechanical-keyboard-us-ansi-layout-8312672845961

Vendor	Location	Coupon Code	In Stock	Price (USD)	Link*
Keychron J4 QMK
	Global	-	Check vendor	Check vendor	Visit shop
Keychron J4 QMK Wireless Mechanische Tastatur (US ANSI Layout)
	No shipping to US			$98	Visit Shop

Vendor

Location

Coupon Code

In Stock

Price (USD)

Link*

Keychron J4 QMK

Global

Check vendor

Visit shop

Keychron J4 QMK Wireless Mechanische Tastatur (US ANSI Layout)

No shipping to US

$98

Visit Shop

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Compare Keychron J4 QMK vs Yunzii B87 vs Ajazz AKC087 Specification

Compare similar keyboards side by side, or use the comparison table to compare all keyboards!

Model	Keychron J4 QMK	Yunzii B87	Ajazz AKC087
	72	85	62
Rating	0.0 stars (0 reviews)	0.0 stars (0 reviews)	0.0 stars (0 reviews)
Purchase Options
Main differences	Released in 2025 Weighs about 870 g Sized at 38 x 366 x 138 mm Offers Yes, Rgb, White, North-face, Rgb North-face, White North-face RGB lighting	Released in 2024 Has Linear, Clicky, Tactile switch options Supports VIA configuration Weighs about 1128 g Sized at 46 x 147 x 373 mm Offers Yes, Rgb, South-face, Rgb South-face RGB lighting	Released in 2023 Has Tactile switch options Equipped with a 2000 mAh battery Weighs about 2110 g Sized at 43 x 138 x 367 mm Made with a Metal, Plastic case Offers Yes, Rgb RGB lighting
Score	Scores Performance: 79.1 Build Quality: 60.8 Productivity: 84.5 Customizability: 74.6 Portability: 73.3	Scores Performance: 81.6 Build Quality: 77.3 Productivity: 89 Customizability: 86.7 Portability: 73	Scores Performance: 48.3 Build Quality: 50.1 Productivity: 65.7 Customizability: 73.7 Portability: 73
Name	Name Keychron J4 QMK	Name Yunzii B87	Name Ajazz AKC087
Release year	Release year 2025	Release year 2024	Release year 2023
Switch Options	Switch Options -	Switch Options Linear, Clicky, Tactile	Switch Options Tactile
Profile	Profile Normal Profile	Profile Normal Profile	Profile Normal Profile
Hot Swappable	Hot Swappable	Hot Swappable	Hot Swappable
Layout Size	Layout Size 80%	Layout Size 80%	Layout Size 80%
Layout Standard	Layout Standard ANSI	Layout Standard ANSI	Layout Standard ANSI
Layout Ergonomics	Layout Ergonomics Normal	Layout Ergonomics Normal	Layout Ergonomics Normal
Knob Support	Knob Support	Knob Support	Knob Support
Display Support	Display Support	Display Support	Display Support
Mac/Win Support	Mac/Win Support	Mac/Win Support	Mac/Win Support
Multi-Media Keys	Multi-Media Keys	Multi-Media Keys	Multi-Media Keys
USB-C	USB-C	USB-C	USB-C
USB passthrough	USB passthrough	USB passthrough	USB passthrough
Connection	Connection Bluetooth, 2.4 GHz, Wired, Wireless	Connection Bluetooth, 2.4 GHz, Wired, Wireless	Connection Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate	Polling Rate 1000 Hz	Polling Rate 1000 Hz	Polling Rate -
Battery capacity	Battery capacity 4000 mAh	Battery capacity 4000 mAh	Battery capacity 2000 mAh
Hall Effect Support	Hall Effect Support	Hall Effect Support	Hall Effect Support
QMK Support	QMK Support	QMK Support	QMK Support
VIA Support	VIA Support	VIA Support	VIA Support
VIAL Support	VIAL Support	VIAL Support	VIAL Support
N-Key Rollover	N-Key Rollover	N-Key Rollover	N-Key Rollover
Rapid Trigger	Rapid Trigger	Rapid Trigger	Rapid Trigger
Mount Style	Mount Style -	Mount Style Gasket Mount	Mount Style Gasket Mount
Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers
Sound Dampening	Sound Dampening	Sound Dampening	Sound Dampening
Backlight	Backlight Rgb, White, North-face	Backlight Rgb, South-face	Backlight Rgb
Case Colors	Case Colors	Case Colors	Case Colors
Case Material	Case Material ABS	Case Material ABS	Case Material Metal, Plastic
Keycaps Material	Keycaps Material PBT	Keycaps Material PBT	Keycaps Material PBT
Dimensions	Dimensions 38 x 366 x 138 mm	Dimensions 46 x 147 x 373 mm	Dimensions 43 x 138 x 367 mm
Weight	Weight 870g	Weight 1128g	Weight 2110g

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Product Description

The Keychron J4 QMK is a wireless mechanical keyboard with an 80% tenkeyless layout, suited for users who want flexible connectivity and customizable key functions. It fits well for hobbyists who value remapping keys and macros through QMK firmware and the Keychron Launcher web app. The hot-swappable switch option allows easy switch replacement without soldering, appealing to those who experiment with different switch types. It is less ideal for users who prioritize a full-size keyboard or require detailed build quality information.

Key Features

Supports 2.4 GHz wireless, Bluetooth, and wired USB connection, offering versatile use across devices and scenarios.
QMK firmware compatibility enables advanced key remapping and macro programming, providing extensive customization.
Hot-swappable switch sockets (on supported versions) allow users to change switches quickly, supporting experimentation and maintenance without soldering.
80% TKL layout balances compactness with access to essential keys, saving desk space while retaining functionality.

Connectivity

The keyboard can connect via 2.4 GHz wireless for lower latency compared to Bluetooth, Bluetooth for multi-device pairing, or wired USB for stable, no-latency input. This flexibility suits users who switch between desktop and mobile devices or prefer different connection modes depending on use.

Compatibility

QMK firmware support allows deep customization of key functions and macros, compatible with major operating systems. The Keychron Launcher web app simplifies programming without requiring advanced technical skills.

Trade-offs

Build quality details such as case material and mounting style are not specified, which may concern users focused on durability or typing feel.
The hot-swappable feature is only available on certain versions, so users must verify the model before purchase.
The 80% layout excludes a dedicated number pad, which may be less suitable for users needing frequent numeric input.

Frequently Asked Questions (FAQ)