灰度转换工具
将任何彩色图片转换为黑白。
Drop your image here
or click to browse · max 50 MB
Settings
6
Fast (larger)Best (smaller)
Converts your image to black and white (grayscale). Upload an image and click Convert.
wasm-vips (~5MB) will be downloaded on first use and cached by your browser.
灰度转换工具
将彩色图片转换为黑白(灰度)。移除所有颜色信息同时保留亮度值。
用途
- 创建经典黑白照片
- 准备单色打印
- 通过移除颜色通道减小文件大小
使用步骤
- 上传图片
- 选择输出格式
- 点击转换
- 下载结果
工作原理
上传彩色图片并点击转换。
技巧与最佳实践
- 灰度PNG比彩色PNG小得多
- 照片用JPEG,图形用PNG
常见问题
灰度图片会更小吗?
是的,灰度图片只有1个通道而非3个,PNG可以小60-70%。
Privacy & Security
This tool uses wasm-vips (libvips compiled to WebAssembly). The WASM binary (~5MB) is downloaded on first use and cached by your browser. All image processing happens locally on your device - your images are never uploaded to any server. This makes it safe for sensitive, private, or confidential images.