PNG 转 BMP 在线转换器

只需 3 步，轻松将您的 PNG 文件转换为 BMP 格式。

BMP⌄

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⚙ 可选设置

Resize

Color Filter

DPI

dpi

Crop (px)

将 PNG 转换为 BMP

BMP是Windows的原生位图格式，某些无法读取现代格式的旧版应用程序、游戏引擎和嵌入式系统需要它。将PNG转换为BMP会删除压缩和透明度层，以完全可预测的格式生成原始像素数据。

为什么将 PNG 转换为 BMP？

🎮

游戏开发

较旧的游戏引擎、图块编辑器和精灵工具通常需要BMP用于纹理和精灵输入。

🖥️

Windows资源

Windows应用程序的自定义光标、壁纸和启动屏幕原生使用BMP。

⚙️

嵌入式系统

微控制器和显示驱动程序无需单独的解码器库即可读取原始BMP像素数据。

🔧

旧版软件

1990年代至2000年代的工业和科学软件可能只接受BMP作为输入格式。

PNG

文件扩展名.png
描述PNG (Portable Network Graphics) is a lossless raster image format that supports transparency. Ideal for graphics, logos, icons, and images that require a transparent background.
相关程序Adobe Photoshop, GIMP, Microsoft Paint, Preview (Mac)
开发者PNG Development Group
MIME 类型image/png

BMP

文件扩展名.bmp
描述BMP (Bitmap) stores uncompressed bitmap digital images independently of the display device. Large file sizes but no quality loss.
相关程序Microsoft Paint, Adobe Photoshop, GIMP, MS Photo Editor
开发者Microsoft
MIME 类型image/bmp

如何将 PNG 转换为 BMP？

只需 3 步，轻松将您的 PNG 文件转换为 BMP 格式。

Step 01

上传您的 PNG 文件

点击「选择文件」或将您的 PNG 图片拖放上传。

Step 02

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。

Step 03

转换文件

点击「立即转换」开始将 PNG 文件转换为 BMP。

Step 04

下载 BMP 文件

转换完成后，下载您已转换的 BMP 文件。

💡

Tip: BMP不支持透明度——PNG的Alpha通道在转换过程中将被白色背景替换。

免费 PNG 转换工具

格式指南

PNG vs BMP：完整格式指南

功能

PNG （源）

BMP （目标）

🗜️压缩

Lossless

None

🔍透明度

Full 8-bit alpha channel — each pixel can be any opacity level from fully transparent (0) to fully opaque (255)

Only in 32-bit BMP via BITMAPV4/V5HEADER alpha channel — inconsistently supported by applications

🎬动画

Not in standard PNG; APNG (Animated PNG) is a non-standard extension with limited, inconsistent support

Not supported

🎨色彩深度

24-bit RGB (16.7M colors) or 32-bit RGBA (16.7M colors + full alpha); up to 48-bit for professional workflows

1-bit monochrome to 32-bit RGBA — most common use is 24-bit (16.7 million colors)

📦文件大小

100 KB – 10 MB — significantly larger than JPG for photographic content

3 MB – 25 MB per image — a 1920×1080 24-bit BMP is approximately 5.9 MB

🌐浏览器支持

Universal — all modern browsers, operating systems, and devices including IE7+

Technically supported by most browsers but virtually never used on the web due to enormous file sizes

🏆最适合

Graphics, logos, UI

Legacy Windows apps

常见使用场景：PNG → BMP

⚙️ Legacy Windows software🖥️ System resource files🔧 Embedded display hardware

⚠️Converting PNG to BMP removes all compression and dramatically increases file size — a 300 KB PNG can become a 3–5 MB BMP. Only use this conversion when the target system specifically requires BMP input.

PNG

关于 {from} 格式 PNG

PNG was created in 1996 as a free, patent-unencumbered alternative to GIF after Unisys enforced its LZW compression patent. The PNG Development Group introduced full-color support, genuine alpha transparency, and superior lossless compression. It quickly became the web standard for logos, UI elements, and any image requiring a transparent background — a role it dominates to this day.

优点

+Lossless — every pixel preserved with zero compression artifacts

+Full 8-bit alpha channel for smooth, semi-transparent edges

+Ideal for text, logos, and graphics where sharpness is non-negotiable

+Unlimited re-saves without any quality degradation whatsoever

+Supports up to 48-bit color depth for professional color workflows

局限性

−3–5× larger than JPG for photographic content

−No native animation support in standard PNG

−Slower to load than WebP for equivalent image content

−Not practical for very high-resolution photographs at web scale

使用时机

→Logos, icons, and brand marks placed over any background color

→Screenshots where text must remain perfectly sharp

→Images edited in multiple passes (keep as the master file)

→Web UI elements, buttons, icons, and interface assets

提示

•PNG-8 (256 colors) halves the file size of PNG-24 for simple flat-color graphics

•Converting PNG to WebP typically saves ~30% file size with no visible quality change

•Alpha transparency requires PNG-24 or PNG-32 — PNG-8 only supports binary transparency

•Tools like pngquant can reduce PNG size by 50–80% with minimal quality impact

BMP

关于 {from} 格式 BMP

BMP (Device-Independent Bitmap) was introduced by Microsoft with the Windows 3.0 SDK in 1990 as the native raster format for Windows. It stores pixel data with zero compression, ensuring perfect reproduction across all hardware. BMP dominated early Windows computing for wallpapers, icons, and application graphics. As the internet grew, its massive file sizes made it impractical for any networked use, displacing it with JPG, PNG, and WebP.

优点

+Zero compression artifacts — the highest possible fidelity for raw storage

+Simple, well-documented format trivial to read/write programmatically

+Universal support across all Windows software and development tools

+Direct pixel data access with no decoding overhead

局限性

−Extremely large files — a 1080p image is ~6 MB vs ~300 KB as JPG

−No practical web use — impractically large for any internet delivery

−Limited support outside Windows ecosystem

−No meaningful advantages over PNG for any modern use case

使用时机

→Legacy Windows applications that exclusively require BMP format