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Compare Keychron K3 Pro vs K4 V2 Differences Side by Side

This comparison is for buyers torn between a compact, travel-friendly layout and a full-function keyboard with a numpad. The Keychron K3 Pro and Keychron K4 V2 are both wireless mechanical keyboards from Keychron, but they serve very different purposes. The decision is hard because both offer hot-swappable switches and strong build quality, yet they excel in completely opposite areas of use. Your choice will ultimately depend on whether you prioritize an ultra-slim profile and advanced programmability or a compact full-size layout with a dedicated number pad.

87
Keychron K3 Pro QMK/VIA Wireless Custom Mechanical Keyboard - Image: 4
70
Keychron K4 Wireless Mechanical Keyboard (UK ISO Layout) - Version 2

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4.6 (54)
4.7 (2530)
  • Released in 2022
  • Features a low-profile design
  • Available in a 75% layout
  • Built with the ISO, JIS, ISO-DE, ISO-ES, ISO-FR, ISO-Nordic, ISO-SW, ISO-UK, ANSI layout standard
  • Supports QMK firmware
  • Supports VIA configuration
  • Features N-key rollover
  • Supports Bluetooth, Wired, Wireless, 2.4 GHz connectivity
  • Equipped with a 1550 mAh battery
  • Weighs about 930 g
  • Sized at 15 x 306 x 116 mm
  • Features ABS, PBT keycaps
  • Offers Yes, Rgb, South-face, Rgb South-face, White, North-face, Rgb North-face, White North-face RGB lighting
  • Released in 2020
  • Available in a 96% layout
  • Built with the ISO, JIS, ISO-UK, ISO-DE, ANSI, ISO-Nordic, ISO-ES layout standard
  • Supports Bluetooth, Wired, Wireless connectivity
  • Equipped with a 4000 mAh battery
  • Features ABS keycaps
  • Offers Yes, Rgb, White, North-face, Rgb North-face, White North-face RGB lighting
Scores
  • Performance: 80.9
  • Build Quality: 81.3
  • Productivity: 79.8
  • Customizability: 89.1
  • Portability: 77.2
Scores
  • Performance: 63.5
  • Build Quality: 69.9
  • Productivity: 67.5
  • Customizability: 70.4
  • Portability: 55
Name
Keychron K3 Pro
Name
Keychron K4 V2
Release year
2022
Release year
2020
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
ISO, JIS, ISO-DE, ISO-ES, ISO-FR, ISO-Nordic, ISO-SW, ISO-UK, ANSI
Layout Standard
ISO, JIS, ISO-UK, ISO-DE, ANSI, ISO-Nordic, ISO-ES
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, 2.4 GHz
Connection
Bluetooth, Wired, Wireless
Polling Rate
1000 Hz
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, South-face, White, North-face
Backlight
 
Rgb, White, North-face
Case Colors
Case Colors
Case Material
Aluminum, Plastic, ABS
Case Material
Aluminum, Plastic, ABS
Keycaps Material
ABS, PBT
Keycaps Material
ABS
Dimensions
15 x 306 x 116 mm
Dimensions
-
Weight
930g
Weight
-
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Pros and Trade-offs

For users who need ultimate portability and deep customization, the Keychron K3 Pro is the better fit. Its low profile, QMK support, and lighter weight make it ideal for the mobile programmer or gamer. If your workflow demands a numpad and you prefer longer battery life, the Keychron K4 V2 is the practical choice, offering a compact full-size layout with a focus on comfort and durability.

Keychron K3 Pro

  • +Ultra-slim low-profile design with LSA profile keycaps, 31% thinner than normal profile keyboards.
  • +Full QMK and VIA support for deep key remapping and macro creation via the Keychron Launcher web app.
  • +South-facing RGB backlighting with over 22 types of settings and a static white option.
  • +Hot-swappable with pre-lubed Gateron low-profile MX 2.0 switches.
  • +Available with both ABS shine-through and PBT double-shot keycap options.
  • −Compact 75% layout lacks a dedicated number pad, which may be a dealbreaker for data entry.
  • −Compatible only with Gateron low-profile switches, limiting standard switch options.
  • −Relatively small 1550 mAh battery capacity compared to some larger keyboards.
  • −Some user reviews note that the keyboard can be loud, with a 'clacky' sound and case resonance.

Keychron K4 V2

  • +96% layout includes a dedicated number pad, providing full-size functionality in a compact form.
  • +Large 4000 mAh battery lasts up to 240 hours of typing with backlight off.
  • +Hot-swappable option supports almost all MX-style 3 and 5 pin switches for easy customization.
  • +Includes an inclined bottom frame for improved ergonomic comfort during extended typing.
  • −Lacks QMK or VIA firmware support, limiting key remapping and macro customization capabilities.
  • −Heavier and deeper profile than low-profile alternatives, less portable for travel.
  • −Uses ABS keycaps as standard, which may be more prone to shine over time compared to PBT options.

Which Keyboard Is Better for Your Needs?

The Keychron K3 Pro wins for gaming, programming, and travel due to its low profile, lighter weight, and comprehensive QMK/VIA customization. The Keychron K4 V2 is the clear choice for office and content creation work, where the included numpad and significantly larger battery offer practical advantages. For modding, both keyboards present strong options, but the K3 Pro favors firmware tinkering while the K4 V2 allows for more standard switch experimentation.

GamingKeychron K3 Pro
  • •Features a 1000 Hz polling rate wired mode, suited for competitive play.
  • •Ultra-slim low-profile design with pre-lubed Gateron switches may feel faster for some gamers.
  • •South-facing RGB and QMK/VIA support allow for custom gaming macros and keymaps.
OfficeKeychron K4 V2
  • •96% layout includes a full numpad, essential for data entry and spreadsheet work.
  • •Larger 4000 mAh battery can last up to 240 hours with backlight off, reducing charging frequency.
  • •Inclined bottom frame adds ergonomic comfort for long typing sessions.
ProgrammingKeychron K3 Pro
  • •QMK/VIA support enables deep customization of every key and complex macros.
  • •Low-profile design reduces hand travel, potentially reducing strain during long coding sessions.
  • •Compact 75% layout leaves more mouse space on the desk.
TravelKeychron K3 Pro
  • •Ultra-slim design is 31% thinner than conventional keyboards, making it easy to pack.
  • •Lightweight at 930 grams and compact 75% footprint, ideal for mobile setups.
  • •Connects wirelessly via Bluetooth 5.1 to up to 3 devices for use with laptops and tablets.
ModdingTie
  • •Both keyboards are hot-swappable, allowing switch changes without soldering.
  • •K3 Pro offers QMK/VIA firmware, while K4 V2 offers a standard hot-swap socket compatible with most MX-style switches.
  • •K3 Pro is limited to low-profile Gateron switches, K4 V2 can accept standard 3 and 5 pin switches.
Content CreationKeychron K4 V2
  • •The 96% layout includes a numpad, which is valuable for entering numbers in editing software or working in spreadsheets.
  • •Larger battery capacity ensures minimal interruption during long creative sessions.
  • •Available with a variety of Gateron G Pro switches, including linear options for quiet operation.

Frequently Asked Questions (FAQ)

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