XTEink X4 - Page 2

CrazyCoder · 12-06-2025, 12:43 PM

There has been huge progress with the converters for this device recently.

Xteink shared the format specs with me, and I put it here: https://gist.github.com/CrazyCoder/b...58249f59f1327d.

Since then people created companion apps and online converters (even one based on crengine compiled into WASM): https://x4converter.rho.sh/.

There are also several custom firmwares already available and a more performant display driver for 4-color rendering.

I almost finished my offline converter based on Cool Reader, will be released soon. See this post for some screenshots: https://www.reddit.com/r/xteinkeread...mment/nsgztpx/.

And there is a Discord server for developers and users: https://discord.gg/2cdKUbWRE8.

kilikini · 12-19-2025, 09:41 PM

I got mine the other day from AliExpress, and I quite like it. First thing I needed to do was change the display to English, and then there was a firmware update available. I haven't changed the font, except for the size. I've been using the x4converter.rho.sh to convert my epubs to .xtc format, which will include the book cover and images, and you can adjust the font details prior to conversion. The sdmicro card is a bit fiddly to deal with, but a credit card worked to pop it out and in again for me.

12-06-2025, 12:43 PM	#16
CrazyCoder Zealot Posts: 120 Karma: 1256026 Join Date: Apr 2011 Location: San Diego, CA, USA Device: Kindle Oasis (10th gen), Kobo Libra 2, Onyx Leaf2 Black	There has been huge progress with the converters for this device recently. Xteink shared the format specs with me, and I put it here: https://gist.github.com/CrazyCoder/b...58249f59f1327d. Since then people created companion apps and online converters (even one based on crengine compiled into WASM): https://x4converter.rho.sh/. There are also several custom firmwares already available and a more performant display driver for 4-color rendering. I almost finished my offline converter based on Cool Reader, will be released soon. See this post for some screenshots: https://www.reddit.com/r/xteinkeread...mment/nsgztpx/. And there is a Discord server for developers and users: https://discord.gg/2cdKUbWRE8.

12-19-2025, 09:41 PM	#17
kilikini Enthusiast Posts: 46 Karma: 376 Join Date: Jan 2009 Location: California Device: iPhone, Kindle, iPad, Xteink X4	I got mine the other day from AliExpress, and I quite like it. First thing I needed to do was change the display to English, and then there was a firmware update available. I haven't changed the font, except for the size. I've been using the x4converter.rho.sh to convert my epubs to .xtc format, which will include the book cover and images, and you can adjust the font details prior to conversion. The sdmicro card is a bit fiddly to deal with, but a credit card worked to pop it out and in again for me.