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Compare Keychron K3 Max vs K4 V3 Differences Side by Side

This comparison is for anyone trying to decide between a compact, travel-friendly low-profile board and a full-sized desktop workhorse. Both keyboards are from Keychron, support QMK/VIA for deep customization, and offer hot-swappable switch options. The decision is hard because they share many core features like wireless connectivity, USB-C, and Mac/Win support, but differ dramatically in layout size, typing angle, and battery capacity. Your choice hinges on whether you need a dedicated number pad and longer battery life, or a sleek, slim design for on-the-go use.

94
Keychron K3 Max QMK/VIA Wireless Custom Mechanical Keyboard ISO Layout Collection
91
Keychron K4 QMK Wireless Mechanical Keyboard (ISO Layout) - Version 3

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4.7 (9)
5.0 (4)
  • 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
  • Uses a Plate Mount mounting style
  • Supports Bluetooth, 2.4 GHz, Wired, Wireless connectivity
  • 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, ISO-UK, ISO-DE, ISO-CH, ISO-Nordic, ANSI layout standard
  • Uses a Tray Mount mounting style
  • 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: 86.4
  • Productivity: 94.3
  • Customizability: 92.3
  • Portability: 77.2
Scores
  • Performance: 81.9
  • Build Quality: 84.1
  • Productivity: 95.2
  • Customizability: 97.6
  • Portability: 54.2
Name
Keychron K3 Max
Name
Keychron K4 V3
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, 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, 2.4 GHz, Wired, Wireless
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
Plate Mount
Mount Style
Tray Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb, White, North-face
Backlight
 
Rgb, White, South-face, White South-face, North-face
Case Colors
Case Colors
Case Material
ABS, Aluminum, Wood, Plastic
Case Material
Plastic
Keycaps Material
PBT, ABS
Keycaps Material
PC, PBT
Dimensions
22 x 306 x 116 mm
Dimensions
-
Weight
580g
Weight
-
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Pros and Trade-offs

If portability, a low-profile typing experience, and low-latency wireless gaming are your priorities, the Keychron K3 Max is the more suitable choice. For a dedicated number pad, vastly superior battery life, and the widest possible switch compatibility for modding, the Keychron K4 V3 is the better option. Both keyboards share excellent QMK/VIA programmability, so your final decision should be based on whether you need a compact travel companion or a full-sized desktop productivity machine.

Keychron K3 Max

  • +Ultra-slim low-profile design with a 75% layout, making it one of the thinnest wireless mechanical keyboards from the vendor.
  • +Features 2.4 GHz wireless with a 1000 Hz polling rate for low-latency gaming, as confirmed by the manufacturer.
  • +Includes advanced acoustic foam (IXPE and latex) for quieter typing, according to the product description.
  • +Lighter weight at 580g and compact size for enhanced portability.
  • −Only compatible with Gateron/Keychron low-profile mechanical switches, limiting switch choices, as stated by the manufacturer.
  • −Smaller 1550mAh battery compared to the K4 V3, requiring more frequent recharging.
  • −Proprietary stabilizers on some keys, as noted in user reviews, may complicate keycap replacement.
  • −No onboard storage for the 2.4 GHz dongle, a common user frustration mentioned in feedback.

Keychron K4 V3

  • +96% layout includes a dedicated number pad, ideal for office and data entry tasks.
  • +Large 4000mAh battery provides extended wireless use without frequent charging.
  • +Hot-swappable PCB supports almost all 3-pin and 5-pin MX-style switches, offering broad customization options.
  • +Multiple layers of acoustic foam (IXPE, EPDM, PET) for a better typing sound, as described by the vendor.
  • −Heavier and larger than the K3 Max, making it less suitable for frequent travel.
  • −Lacks a dedicated 2.4 GHz wireless mode, relying only on Bluetooth for wireless use.
  • −Tray mount design may feel less premium than other mounting styles, according to the metadata.
  • −Only a single adjustable typing angle of 5 degrees is listed in the specs, despite the vendor mentioning three levels.

Which Keyboard Is Better for Your Needs?

The K3 Max takes the lead for gaming due to its dedicated 2.4 GHz mode and slim profile, and it is the clear winner for travel because of its lighter weight and smaller footprint. The K4 V3 dominates in office use with its full number pad and larger battery, and is the preferred choice for modding due to its standard switch mounting and barebones option. For programming and content creation, the decision is tied, as both boards offer the same powerful QMK/VIA customization, and the layout choice comes down to individual workflow needs.

GamingKeychron K3 Max
  • •Offers a dedicated 2.4 GHz wireless mode with a 1000 Hz polling rate, as stated by the manufacturer, for low-latency gaming.
  • •The slim low-profile design keeps the keyboard closer to the desk surface, which some gamers prefer for faster finger movement.
  • •Includes multiple foam layers (IXPE acoustic foam, latex foam) that the vendor states reduce noise for a quieter gaming session.
OfficeKeychron K4 V3
  • •The 96% layout includes a full number pad, which is useful for data entry and spreadsheet work.
  • •Has a significantly larger 4000mAh battery compared to the K3 Max's 1550mAh, reducing the need for frequent charging.
  • •Offers adjustable typing angles of 5, 8, and 11 degrees, as per the vendor, for better ergonomic wrist support during long typing sessions.
ProgrammingTie
  • •Both keyboards support QMK and VIA firmware, allowing for full key remapping and macro creation as mentioned by the manufacturer.
  • •Both use the Keychron Launcher web app for customization, which the vendor says is compatible with macOS, Windows, and Linux.
  • •The K3 Max has a compact 75% layout and is low profile, while the K4 V3 offers a 96% layout with a number pad; the best choice depends on personal preference for layout and key travel.
TravelKeychron K3 Max
  • •The K3 Max is significantly lighter at 580 grams and has a slim profile, making it easier to pack in a bag.
  • •Its 75% layout is smaller than the K4 V3's 96% layout, taking up less desk space when on the road.
  • •Includes a 2.4 GHz dongle for a reliable connection away from home, though the vendor does not mention onboard dongle storage.
ModdingKeychron K4 V3
  • •The K4 V3 uses a standard tray mount and accepts almost all 3-pin and 5-pin MX-style switches, as stated by the vendor, giving it the widest switch compatibility.
  • •Has a higher customizability score relative to its price tier, suggesting better support for aftermarket parts.
  • •Available as a DIY Kit/Barebones version, allowing users to build from scratch with their own choice of switches and keycaps.
Content CreationTie
  • •Both keyboards offer hot-swappable switches, letting creators tailor the feel for typing-heavy tasks like video descriptions or scripting.
  • •QMK and VIA support on both boards enables creators to program custom shortcuts for editing software (e.g., cut, copy, timeline navigation).
  • •The K4 V3 includes a number pad which can be useful for numeric data entry, while the K3 Max's compact size frees up desk space for a drawing tablet or other peripherals.

Frequently Asked Questions (FAQ)

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