On June 8, 2023, Keychron updated its official Twitter page to announce the addition of “Developer” to its new low-profile mechanical keyboard replacement keycaps.
In addition to this, Hacker also has a lineup.

Supported keyboards are as follows
- K1 Pro
- K3 Pro
- K5 Pro
- K7 Pro
- K9 Pro
- K13 Pro
- S1
An important note is that it is not compatible with the existing series of odd-numbered editions that do not bear the Pro designation.
*No confirmation yet.
Although details are not given, the likely cause is that the space bar stabilizers have been repositioned.
On earlier K7/K3 and other keyboards, the space bar stabilizer position was different from that of common low-profile mechanical keyboards such as NuPhy, and was only compatible with dedicated keycaps.
This is thought to be corrected by the Pro Series LOFILE mechanical mechanical keyboard.
Therefore, this keycap would probably be compatible with NuPhy.
To purchase, please visit the official website.
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Author of this article
Greenkeys Editor-in-Chief/Web Writer /Founder of Japan Layout Alliance (JLA)
I am the editor-in-chief of Greenkeys, a Japanese media specializing in keyboards.
I am consistently responsible for reviewing, interviewing, verifying, photographing, measuring, and writing about mechanical keyboards, home-made keyboards, and input devices.
We have reviewed more than 100 keyboards and input devices to date, organizing information and providing market commentary on Japanese-layout keyboard compatibility issues.
We have also established the Japan Layout Alliance (JLA), an industry collaboration project aimed at standardizing the compatibility of Japanese-language keyboards, and are promoting activities in cooperation with domestic and foreign manufacturers.
Greenkeys values editorial independence and transparency, and we clearly state in our articles whether we are offering products, advertising, or affiliate status is clearly stated in the articles.

