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

  1. 上传图片
  2. 选择输出格式
  3. 点击转换
  4. 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.