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Compare Keychron K3 Pro vs K4 V3 Differences Side by Side

This comparison is for buyers deciding between two wireless QMK/VIA keyboards from Keychron, the K3 Pro and the K4 V3. The K3 Pro offers a ultra-slim low-profile design in a 75% layout, while the K4 V3 provides a full 96% layout with a numpad and enhanced acoustic foam layers. The decision is hard because both support hot-swappable switches, QMK firmware, and Bluetooth connectivity, yet they serve very different space and ergonomic needs.

87
Keychron K3 Pro QMK/VIA Wireless Mechanical Keyboard ISO Layout Collection
91
Keychron K4 QMK Wireless Mechanical Keyboard (ISO Layout) - Version 3

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4.6 (54)
5.0 (4)
  • 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 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
  • Made with a Aluminum, Plastic, ABS case
  • 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 2025
  • Available in a 96% layout
  • Built with the ISO, ISO-UK, ISO-DE, ISO-CH, ISO-Nordic, ANSI layout standard
  • Includes screw-in stabilizers
  • Has built-in sound dampening
  • Supports Bluetooth, Wired, Wireless connectivity
  • Equipped with a 4000 mAh battery
  • Made with a Plastic case
  • Features PC, PBT keycaps
  • Offers Yes, Rgb, White, South-face, Rgb South-face, White South-face, 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: 81.9
  • Build Quality: 84.1
  • Productivity: 95.2
  • Customizability: 97.6
  • Portability: 54.2
Name
Keychron K3 Pro
Name
Keychron K4 V3
Release year
2022
Release year
2025
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, ISO-UK, ISO-DE, ISO-CH, ISO-Nordic, 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, 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, South-face, White South-face, North-face
Case Colors
Case Colors
Case Material
Aluminum, Plastic, ABS
Case Material
Plastic
Keycaps Material
ABS, PBT
Keycaps Material
PC, PBT
Dimensions
15 x 306 x 116 mm
Dimensions
-
Weight
930g
Weight
-
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Pros and Trade-offs

The Keychron K3 Pro is the right choice if you value a slim, portable design and work with a limited desktop footprint. The Keychron K4 V3 is better for those who need a numpad, prefer quieter acoustics from its layered foam, and want to use standard MX switches. Your decision ultimately comes down to layout size and whether low-profile portability or full-size functionality matters more.

Keychron K3 Pro

  • +Ultra-slim low-profile design, 31% thinner than normal profile switches according to Keychron
  • +Aluminum body provides a premium feel at a lighter 930g weight
  • +Available in multiple ISO layouts including FR and ES, plus both ANSI and JIS
  • +South-facing RGB avoids interference when using Cherry-profile keycaps
  • +Three-level adjustable typing angle for ergonomic wrist support
  • −Only compatible with Gateron low-profile switches, not standard MX switches
  • −Smaller 1550mAh battery requires more frequent charging than the K4 V3
  • −No sound-dampening foam mentioned in the specs, potentially louder typing

Keychron K4 V3

  • +96% layout includes a full numpad for number-heavy workflows
  • +Four layers of foam (sound-absorbing, IXPE, EPDM, PET) for quieter typing
  • +4000mAh battery offers one of the largest capacities for extended wireless use
  • +Screw-in steel stabilizers provide more stable typing on large keys
  • +Accepts almost any 3pin/5pin MX mechanical switch for easy customization
  • −Heavier and bulkier than the K3 Pro, which is less travel-friendly
  • −Plastic case with optional aluminum frame, not a full aluminum body
  • −Limited ISO layout options (UK, DE, Nordic, CH) compared to the K3 Pro's wider selection

Which Keyboard Is Better for Your Needs?

The K4 V3 wins in office, modding, and content creation thanks to its 96% layout with a numpad, multiple foam layers for quieter acoustics, and broad MX switch compatibility. The K3 Pro takes travel and programming due to its lighter weight, low-profile ergonomics, and compact 75% footprint. Gaming is a tie because both share 1000 Hz polling, N-Key Rollover, and hot-swap sockets.

GamingTie
  • •Both offer a 1000 Hz polling rate in wired mode for low latency
  • •Both support N-Key Rollover
  • •Both have hot-swappable switches for customizing feel
OfficeKeychron K4 V3
  • •K4 V3's 96% layout includes a dedicated numpad for data entry
  • •K4 V3 features added sound-absorbing foam, IXPE foam, and EPDM foam for quieter typing
  • •K4 V3 sports a larger 4000mAh battery for longer wireless use
ProgrammingKeychron K3 Pro
  • •K3 Pro's 75% layout keeps navigation keys accessible while saving desk space
  • •K3 Pro's low-profile design can reduce wrist strain during long coding sessions
  • •QMK/VIA support is available on both, but K3 Pro's compact layout appeals to minimalists
TravelKeychron K3 Pro
  • •K3 Pro is lighter at 930g compared to the K4 V3's unlisted heavier weight (930g vs 96% chassis)
  • •K3 Pro's ultra-slim profile is easier to pack in a bag
  • •K3 Pro's smaller 75% footprint takes up less space on a cramped desk or tray table
ModdingKeychron K4 V3
  • •K4 V3 supports almost all 3pin and 5pin MX style switches, not just low-profile Gateron
  • •K4 V3 has screw-in steel stabilizers for smoother big keys
  • •K4 V3 includes multiple foam layers (sound-absorbing, IXPE, EPDM, PET) for acoustic tuning
  • •K4 V3 is available as a barebones DIY kit for custom builders
Content CreationKeychron K4 V3
  • •K4 V3's numpad is useful for entering numbers in editing timelines and spreadsheets
  • •K4 V3's larger battery (4000mAh) supports longer untethered creative sessions
  • •Customizable macro keys via QMK/VIA are available on both, but K4 V3 has more keys to assign

Frequently Asked Questions (FAQ)

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