Convert BMP to ICO — Favicons and Windows Icons
Convert BMP to ICO online to make a favicon or Windows icon in several sizes. No software to install. Preview one free or batch-convert with Premium.
Drop your BMP file or click to browse
Why convert BMP to ICO?
- One ICO bundles the standard 16 to 256 px icon sizes (up to the size of your image), ready for a favicon.ico or a Windows shortcut.
- 当您将 ICO 保存为 favicon.ico 时，浏览器会将其显示为您网站的标签页和书签图标。
What to expect when converting BMP to ICO
- 图标是正方形的，因此非正方形图片会居中放置在透明正方形上。不会生成比您的图片更大的尺寸，所以请从至少 256 × 256 像素的图片开始。
- 您原来的 BMP 文件不会被更改：您下载的是一份新的 ICO 副本。
BMP 与 ICO 对比
| 功能 | BMP | ICO |
|---|---|---|
| 全名 | Windows 位图 | Windows 图标 |
| 来源 | Created by Microsoft for Windows | Created by Microsoft for Windows icons |
| 压缩 | 未压缩 | Lossless images at several sizes |
| 透明度 | No (in the 24-bit BMPs most apps read) | Yes — smooth, partial transparency |
| 动画 | 否 | 否 |
| 颜色 | 1670 万种颜色（24 位） | 全彩并支持透明 |
| 可用什么打开 | Windows and macOS apps, older software and browsers | Browsers (as favicon.ico), Windows and icon editors |
| 最适合 | older Windows programs, embedded devices and tools that need raw pixels | website favicons and Windows app or shortcut icons |
| 主要缺点 | very large files and no transparency | icons are square and at most 256 × 256 pixels |
In short: choose BMP for older Windows programs, embedded devices and tools that need raw pixels; choose ICO for website favicons and Windows app or shortcut icons.
Frequently asked questions
- How do I convert BMP to ICO?
- Upload your BMP file above. It is converted to ICO automatically (change the output format or quality in the Settings tab if you need to), then click Download. There is nothing to install.
- Does converting BMP to ICO lose quality?
- Each icon size is scaled down from your image and stored without further compression, so small sizes stay crisp.
- BMP or ICO: which should I use?
- Use BMP for older Windows programs, embedded devices and tools that need raw pixels. Use ICO for website favicons and Windows app or shortcut icons. Keep in mind the main drawback of ICO: icons are square and at most 256 × 256 pixels.
- 什么是 BMP 文件？
- BMP 存储像素时完全不压缩。文件很大，但那些读不了现代格式的老旧或简单软件通常都能读取 BMP。
- What sizes does the ICO file include?
- The standard icon sizes of 16, 32, 48, 64, 128 and 256 pixels, skipping any larger than your image. Browsers and Windows pick the best size automatically.
- Is the BMP to ICO converter free?
- Yes. Convert, preview and download a single result without creating an account. Premium adds batch conversion (many files into one ZIP) and larger uploads.
使用 BMP 转 ICO 可以做什么
在开始之前查看主要功能。
- Convert BMP files to ICO online
- Bundle standard icon sizes from 16 to 256 px in one file
- Switch to any other output format in Settings
- Batch-convert many BMP files into one ZIP
- Preview the result before you download
设置参考
5 个设置
BMP 转 ICO 的可用控件。
设置
- 输出格式下拉框
- Chooses the file type you download. The page opens on its own output format; switch to any other format before converting.选项: JPGPNGWebPAVIFGIFTIFFBMPICOPDF
- 质量滑块范围: 20–100 · 默认: 90
- For JPG, WebP, AVIF and image-to-PDF output: higher keeps more detail but makes a bigger file; 60–80 suits most photos. Documents (Publisher, XPS, EPS…) become PDFs with every page and sharp text, with no quality setting.
- 无损模式开／关
- For WebP and AVIF output: keeps every pixel exactly (best for logos, graphics and transparency) at the cost of a larger file.
- 背景填充取色器
- 适用于无法存储透明度的 JPG、BMP 和图片转 PDF 输出：用于填充透明区域的颜色（默认为白色）。
模式
- 单个文件 / 批量下拉框
- 使用共享设置处理一个文件或一批文件。批量结果下载为一个 ZIP。选项: 单个文件批量
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