JPG透明化

功能说明What It Does

JPG透明化工具把图片的指定区域处理为透明。矩形框选适合整块去除,画笔涂抹适合精细擦除边缘与小块;每一步都可撤销,最终导出保留透明通道的 PNG。

This tool makes selected areas of an image transparent. Rectangle selection removes whole blocks; the brush handles fine edges and small spots. Every step is undoable, and the result exports as a PNG that keeps the alpha channel.

全部在浏览器本地完成,数据不会上传。

Everything runs locally in your browser - nothing is uploaded.

两种擦除方式Two erase modes

矩形框选:在画布上拖拽出一个矩形,松开后该区域立即变透明。画笔涂抹:按住鼠标在画布上涂抹,笔刷大小 4-80px 可调,适合抠出物体边缘或擦除局部。

Rectangle: drag out a box and the area becomes transparent on release. Brush: press and paint across the canvas with a 4-80px adjustable brush, ideal for cutting out object edges or erasing parts.

使用步骤How to Use

1. 上传图片。Upload an image.
2. 选择「矩形框选」或「画笔涂抹」,把想去掉的区域擦成透明。Pick "Rectangle" or "Brush" and erase the areas you want gone.
3. 擦错了点「撤销」,满意后「导出透明PNG」。Use "Undo" if you make a mistake, then "Export PNG".

常见问题FAQ