JPEG to BMP Online Converter

只需 3 步，轻松将您的 JPEG 文件转换为 BMP 格式。

BMP⌄

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⚙ 可选设置

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Convert JPEG to BMP Online

BMP is Windows' foundational bitmap format, used natively by the operating system for wallpapers, icons, and legacy software. Converting JPG to BMP removes all compression to produce raw pixel data — the simplest possible image representation. While the resulting files are large, they load instantly without a decode step, which matters in performance-critical or embedded environments. Many older Windows applications, embedded systems, and game engines only accept BMP as input.

When to Convert JPEG to BMP

⚙️

Windows native

BMP is the OS-level format for Windows wallpapers, custom cursors, and system resources.

🎮

Retro game dev

Classic game engines like RPG Maker require BMP for sprites, tilesets, and splash screens.

🔬

Scientific imaging

Lab and medical imaging software demands uncompressed BMP for exact pixel-level processing.

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Direct pixel access

BMP's simple structure allows direct memory access without a decoder — fast for real-time use.

JPEG vs BMP — Format Comparison

Property	JPEG (input)	BMP (output)
Format type	Raster	Raster
Compression	Lossy	None
Transparency	No	No
Best used for	Photos, web images	Legacy Windows apps
File size	Small	Very Large

ℹ️ Important note

BMP files can be 10–20× larger than equivalent JPG files. Verify your target system has enough storage before batch-converting large image libraries to BMP.

如何将 JPEG 转换为 BMP？

上传您的 JPEG 文件

点击「选择文件」或将您的 JPEG 图片拖放上传。

选择 BMP 作为输出格式

从下拉菜单中选择「BMP」作为所需输出格式。

转换文件

点击「立即转换」开始将 JPEG 文件转换为 BMP。

下载 BMP 文件

转换完成后，下载您已转换的 BMP 文件。

JPEG

File extension.jpeg
DescriptionJPEG is the most widely used lossy image compression format, ideal for photographs and complex images with many colors.
Associated programsAdobe Photoshop, GIMP, Windows Photo Viewer, Preview (Mac)
Developed byJoint Photographic Experts Group
MIME typeimage/jpeg

BMP

File extension.bmp
DescriptionBMP (Bitmap) stores uncompressed bitmap digital images independently of the display device. Large file sizes but no quality loss.
Associated programsMicrosoft Paint, Adobe Photoshop, GIMP, MS Photo Editor
Developed byMicrosoft
MIME typeimage/bmp