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Compare Keychron K3 Max vs K4 Max Differences Side by Side

This comparison is for buyers deciding between two advanced Keychron Max-series keyboards: the low-profile, 75% K3 Max and the full-featured, 96% K4 Max. The decision is hard because both share core features like 1000 Hz polling, QMK/VIA support, hot-swappable switches, and tri-mode wireless. However, they diverge sharply on layout size, profile height, weight, battery capacity, and switch compatibility, making each suited for different priorities and daily use scenarios.

94
Keychron K3 Max QMK/VIA Wireless Custom Mechanical Keyboard ISO Layout Collection
87
Keychron K4 Max QMK Wireless Mechanical Keyboard ISO Layout Collection

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4.7 (9)
5.0 (1)
  • Released in 2023
  • Has Tactile, Linear, Clicky switch options
  • Features a low-profile design
  • Available in a 75% layout
  • Built with the ISO, ISO-UK, ISO-DE, ISO-Nordic, ISO-SW, ANSI layout standard
  • Connects via USB-C
  • Uses a Plate Mount mounting style
  • Equipped with a 1550 mAh battery
  • Weighs about 580 g
  • Sized at 22 x 306 x 116 mm
  • Made with a ABS, Aluminum, Wood, Plastic case
  • Features PBT, ABS keycaps
  • Offers Yes, Rgb, White, North-face, Rgb North-face, White North-face RGB lighting
  • Released in 2025
  • Has Linear, Tactile, Clicky switch options
  • Available in a 96% layout
  • Built with the ISO, ANSI layout standard
  • Uses a PCB Mount mounting style
  • Equipped with a 4000 mAh battery
  • Weighs about 1290 g
  • Sized at 31 x 391 x 140 mm
  • Made with a ABS case
  • Features PBT keycaps
  • Offers Yes, Rgb, South-face, Rgb South-face, White, White South-face RGB lighting
Scores
  • Performance: 80.9
  • Build Quality: 86.4
  • Productivity: 94.3
  • Customizability: 92.3
  • Portability: 77.2
Scores
  • Performance: 82
  • Build Quality: 80.3
  • Productivity: 89.4
  • Customizability: 93
  • Portability: 50.8
Name
Keychron K3 Max
Name
Keychron K4 Max
Release year
2023
Release year
2025
Switch Options
Tactile, Linear, 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, ISO-UK, ISO-DE, ISO-Nordic, ISO-SW, ANSI
Layout Standard
ISO, 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
Bluetooth, 2.4 GHz, 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
Plate Mount
Mount Style
PCB Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb, White, North-face
Backlight
 
Rgb, South-face, White, White South-face
Case Colors
Case Colors
Case Material
ABS, Aluminum, Wood, Plastic
Case Material
ABS
Keycaps Material
PBT, ABS
Keycaps Material
PBT
Dimensions
22 x 306 x 116 mm
Dimensions
31 x 391 x 140 mm
Weight
580g
Weight
1290g
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Pros and Trade-offs

If your priority is a portable, ultra-slim keyboard for travel or tight desks, the Keychron K3 Max delivers with its 75% low-profile design and lightweight build. If you need a full set of keys, including a number pad, for office or content creation work, the Keychron K4 Max offers a larger battery and wider switch compatibility. Your choice ultimately depends on whether key count and battery life matter more than portability and profile height.

Keychron K3 Max

  • +Ultra-slim low-profile design with aluminum frame, weighing only 580g for easy portability.
  • +75% layout saves desk space while retaining function row and arrow keys.
  • +Comes with low-profile double-shot PBT keycaps and supports Gateron/Keychron low-profile switches.
  • +Includes IXPE acoustic foam and latex foam for a quiet, responsive typing feel.
  • +Available in multiple layout standards (ANSI, ISO, ISO-DE) for regional preferences.
  • −Switches are limited to low-profile Gateron/Keychron mechanical switches only, not standard MX.
  • −Smaller 1550mAh battery requires more frequent charging than the K4 Max.
  • −Proprietary stabilizers on some keys may limit aftermarket keycap choices according to user feedback.
  • −No on-board storage for the 2.4 GHz dongle, as noted in user reviews.

Keychron K4 Max

  • +96% layout includes a dedicated number pad for efficient data entry and navigation.
  • +Large 4000mAh battery supports extended wireless use with less frequent charging.
  • +Supports almost all 3-pin and 5-pin MX style switches, including Cherry, Gateron, and Kailh.
  • +Multiple acoustic foam layers (IXPE, PET, EPDM) combined with a steel plate for a stable and quiet typing experience.
  • +South-facing RGB prevents interference with Cherry-profile keycaps, offering better customization options.
  • −Heavier at 1290g, making it less convenient for frequent travel or carrying between locations.
  • −Normal-profile design lacks the slim, low-profile feel of the K3 Max.
  • −Only available in ANSI and ISO layout standards, limiting regional keyboard options.
  • −The steel plate and dense foam add stability but result in a noticeably heavier keyboard overall.

Which Keyboard Is Better for Your Needs?

For gaming, both keyboards are evenly matched due to identical 1000 Hz polling and QMK support. The K4 Max takes office and content creation thanks to its full number pad and larger battery. The K3 Max wins for travel and programming with its lightweight, low-profile design. Modders will prefer the K4 Max's wider switch compatibility and south-facing RGB, while the K3 Max remains a solid choice for portable customization.

GamingTie
  • •Both support a 1000 Hz polling rate on 2.4 GHz and wired modes for low-latency gaming.
  • •Each offers QMK/VIA programmability for remapping keys and creating macros.
  • •Both have hot-swappable switches, allowing gamers to choose their preferred feel.
OfficeKeychron K4 Max
  • •The K4 Max's 96% layout includes a dedicated number pad, speeding up data entry.
  • •Its 4000mAh battery lasts longer between charges for heavy daily use.
  • •Acoustic foams (IXPE, PET, EPDM) provide a quieter typing experience in shared spaces.
ProgrammingKeychron K3 Max
  • •The 75% layout saves desk space while keeping all essential keys accessible.
  • •Low-profile design reduces hand elevation, which may reduce wrist strain during long sessions.
  • •Lightweight at 580g makes it easier to shift between home and office setups.
TravelKeychron K3 Max
  • •At 580g and ultra-slim dimensions (22 x 306 x 116 mm), it is much easier to pack.
  • •Available with a 75% layout that fits in most bags without sacrificing function keys.
  • •Bluetooth 5.1 and 2.4 GHz provide flexible connectivity without extra dongle storage concerns (though the dongle is small).
ModdingKeychron K4 Max
  • •The K4 Max uses PCB mount and accepts almost all 3-pin and 5-pin MX style switches, including Cherry, Gateron, and Kailh.
  • •It features a steel plate, EPDM foam, and screw-in stabilizers for extensive customization.
  • •South-facing RGB avoids interference with Cherry-profile keycaps, giving more keycap options.
Content CreationKeychron K4 Max
  • •The 96% layout includes a number pad and all navigation keys, ideal for timeline editing and data input.
  • •Larger battery (4000mAh) supports extended creative sessions without recharging.
  • •OSA-profile PBT keycaps offer a familiar, comfortable shape for all-day typing.

Frequently Asked Questions (FAQ)

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