🖤 WBMP 图片转换（PNG/JPG ⇄ WBMP）WBMP Converter (PNG/JPG ⇄ WBMP)

使用说明与常见问题How-to & FAQ

「WBMP 图片转换（PNG/JPG ⇄ WBMP）」是什么？What is the WBMP Converter (PNG/JPG ⇄ WBMP) tool?

把 PNG、JPG 等图片转换成 WAP 时代的 WBMP 黑白位图（可选阈值或抖动），也能打开 .wbmp 文件预览并转回 PNG，常用于老式功能机、单片机和点阵屏开发。Convert PNG, JPG and other images to the 1-bit WBMP format from the WAP era (threshold or dithering), or open .wbmp files to preview and convert them back to PNG — handy for feature phones, microcontrollers and dot-matrix displays.

如何使用「WBMP 图片转换（PNG/JPG ⇄ WBMP）」？How do I use the WBMP Converter (PNG/JPG ⇄ WBMP)?

上传普通图片会自动转换为黑白 WBMP，可调整宽度、阈值和是否抖动，预览满意后下载 .wbmp；上传 .wbmp 文件则会显示图片并可下载为 PNG。Upload a normal image to convert it to black-and-white WBMP, adjusting the width, threshold and dithering, then download the .wbmp; upload a .wbmp to view it and save it as PNG.

WBMP 是什么格式？What is WBMP?

WBMP（Wireless Bitmap）是 WAP 1.x 规范定义的单色位图格式：每个像素 1 位，只有黑白两色，文件头只有类型、宽和高，结构极简，现在多用于单片机、电子价签和点阵屏。WBMP (Wireless Bitmap) is the 1-bit monochrome format from the WAP 1.x spec: one bit per pixel, black or white, with a header of just type, width and height. Today it is mostly used for microcontrollers, e-paper labels and dot-matrix screens.

抖动有什么用？What does dithering do?

黑白图片只能表现两种颜色，抖动用黑白点的疏密来模拟灰度，照片会保留更多层次；线稿、文字和图标建议关闭抖动，边缘更干净。With only black and white, dithering simulates grey by varying dot density, keeping more detail in photos; turn it off for line art, text and icons for cleaner edges.

「WBMP 图片转换（PNG/JPG ⇄ WBMP）」免费吗？数据会上传吗？Is the WBMP Converter (PNG/JPG ⇄ WBMP) free? Is my data uploaded?

「WBMP 图片转换（PNG/JPG ⇄ WBMP）」完全免费，无需注册或安装，手机和电脑都能用；所有处理都在你的浏览器本地完成，输入的内容和文件不会上传到服务器。The WBMP Converter (PNG/JPG ⇄ WBMP) is completely free with no sign-up or install and works on phones and desktops; everything runs locally in your browser and nothing you enter is uploaded.