CrossPoint Reader

Korean firmware v1.3.0-ko.1

June 15, 2026 released
What's New

A complete open-source firmware for the Xteink X3 and X4 e-ink readers.
A single firmware supports both models, with full Korean EPUB and TXT reading.

Install GuideDownload Firmware
Xteink X4 form factor
CrossPoint logoCrossPointv1.3.0-ko.1
Xteink X4
4.3″ · 800×480
Xteink X3 form factor
CrossPoint logoCrossPointv1.3.0-ko.1
Xteink X3
3.7″ · 792×528

Key Features

Highlights of the Korean edition of CrossPoint Reader.

EPUB & TXT with Korean rendering

EPUB 2/3 (with images and tables), a TXT reader, and the X4-specific XTC/XTCH formats. Bundled KoPub Batang plus custom .epdfont fonts render Hangul, Hanja, and special characters cleanly.

Web flasher & font converter

Flash over USB from Chrome/Edge with no esptool or driver install. Convert TTF/OTF fonts into .epdfont right in the browser and drop them onto the SD card.

WiFi transfer & Calibre integration

Built-in web server for wireless uploads, OPDS catalog downloads, and Calibre Wireless transfers. Hotspot mode lets you connect directly without a router.

KOReader reading-progress sync

Pair with a KOReader Sync server to keep your last reading position aligned across phones, tablets, and other readers.

Smart reading environment

Auto page turn, inline footnote navigation, screen rotation, cover/custom-image sleep screens, fine-grained font/spacing/layout controls, and multilingual EPUB support.

CrossPoint Cloud — remote SD sync

After a one-time pairing, you can upload, download, rename, and delete SD-card files from any browser. The reader opens an outbound WebSocket to the cloud, so no port forwarding is required.

Quick Install

Install firmware right from your web browser.

1

Connect USB

Connect the X4 with a USB-C cable, or the X3 with the included magnetic cable, to your computer.

2

Run the web flasher

Open the web flasher, connect your device, and choose the firmware.

3

Flash complete

The device reboots automatically once flashing finishes. If it appears stuck, press the Reset button and hold the power button for at least one second to boot.

Run web flasherView detailed install guide

This Korean firmware is built on top of the project below.

github.com

crosspoint-reader/crosspoint-reader

Open-source firmware for the Xteink X4 e-ink reader. Supports EPUB reading with WiFi file upload.

C++MIT License

Also thanks to the inspiring diy-esp32-epub-reader by atomic14.

Contributors

davealliedaveallieznelsonznelsonjpirnayjpirnayUri-TauberUri-Tauberjonasdiemerjonasdiemerosteotekosteotekngxsonngxsonitsthisjustinitsthisjustinjeremydkjeremydkstekastekalukesteinlukesteinpablohcpablohcjdk2pqjdk2pquxjuliauxjuliaeunchurneunchurnariel-lindemannariel-lindemannWuTofuWuTofuIFAKAIFAKACaptainFritoCaptainFritoLevrkLevrkelelmcrossonmcrossonmartinbrookmartinbrookolearycrewolearycrewmaeveynotmaeveynotmatteoscopelmatteoscopelmirus-uamirus-uamrtnvgrmrtnvgrdexifdexifEloren1Eloren1

If you'd like to sponsor the project

Sponsor Dave AllieKo-fi (eunchurn)Buy Me a Coffee

Useful Links

Handy resources to use alongside the Xteink X3/X4.

Official Web Flasher

Install firmware directly from your web browser.

xteink.dve.al

X4 Converter

A file conversion tool dedicated to the X4.

x4converter.rho.sh

EPUB to XTC

Convert EPUB files into the XTC/XTCH format.

epub2xtc.streamlit.app

Calibre Workflow

A Calibre plugin for optimizing EPUB files.

GitHub

Calibre Plugins

A plugin that sends EPUB files from Calibre to CrossPoint Reader over WiFi.

GitHub

Discord Community

Chat with other users and get help.

Join the community

Readme.club

A community for Xteink users.

www.readme.club

X4 Wallpaper Converter

Convert images into BMP files for the X4 sleep screen.

wallpaperconverter.jakegreen.dev