Convert JPG to BMP — Uncompressed Bitmaps
Convert JPG to BMP online for an uncompressed bitmap that older apps can read. No software to install. Preview one free or batch-convert with Premium.
Drop your JPG file or click to browse
Why convert JPG to BMP?
- BMP is lossless, so the converted image loses no further detail when you edit and save it again.
- BMP is made for older Windows programs, embedded devices and tools that need raw pixels.
What to expect when converting JPG to BMP
- 转换无法找回 JPG 压缩已去除的细节：BMP 是图像现状的精确副本，文件通常更大。
- 您原来的 JPG 文件不会被更改：您下载的是一份新的 BMP 副本。
JPG 与 BMP 对比
| 功能 | JPG | BMP |
|---|---|---|
| 全名 | JPEG (Joint Photographic Experts Group) | Windows 位图 |
| 来源 | 1992 年标准化 | Created by Microsoft for Windows |
| 压缩 | 有损，质量可调 | 未压缩 |
| 透明度 | 否 | No (in the 24-bit BMPs most apps read) |
| 动画 | 否 | 否 |
| 颜色 | 1670 万种颜色（每通道 8 位） | 1670 万种颜色（24 位） |
| 可用什么打开 | All browsers, phones, computers and photo apps | Windows and macOS apps, older software and browsers |
| 最适合 | photos you share, email, print or upload | older Windows programs, embedded devices and tools that need raw pixels |
| 主要缺点 | no transparency, and every re-save loses a little more detail | very large files and no transparency |
In short: choose JPG for photos you share, email, print or upload; choose BMP for older Windows programs, embedded devices and tools that need raw pixels.
Frequently asked questions
- How do I convert JPG to BMP?
- Upload your JPG file above. It is converted to BMP 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 JPG to BMP lose quality?
- 不会增加新的损失：BMP 会按原样完整保存图片。之前 JPG 压缩所去除的细节无法恢复。
- JPG or BMP: which should I use?
- Use JPG for photos you share, email, print or upload. Use BMP for older Windows programs, embedded devices and tools that need raw pixels. Keep in mind the main drawback of BMP: very large files and no transparency.
- 什么是 JPG 文件？
- JPG is the standard format for photos. It shrinks files by discarding detail the eye barely notices, which suits photographs but blurs text and sharp edges.
- Is the JPG to BMP 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 JPG 转 BMP 可以做什么
在开始之前查看主要功能。
- Convert JPG files to BMP online
- 用您选择的背景色填充透明区域
- Switch to any other output format in Settings
- Batch-convert many JPG files into one ZIP
- Preview the result before you download
设置参考
5 个设置
JPG 转 BMP 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
免费使用 · 无需注册 · 无水印上传过程全程加密传输已根据我们的数据保留政策移除
