PNG 转 JPG 转换器
A free PNG to JPG converter for Portable Network Graphics files. Browser-based pairs here usually run in this tab, with no file upload.
将你的 PNG 文件拖放到这里
or 浏览你的设备 · 粘贴快捷键 Ctrl+V
Accepts .png files. You can queue several files; each is processed one after another on your own device.
你的文件永远不会离开这台设备 —— 没有上传，也就没有服务器可以从中删除它们。
- 01
添加你的 PNG 文件
将文件拖放到上方的方框里，或点击浏览选择。它们会直接从磁盘读取 —— 不会发送到任何地方。
- 02
检查设置
JPG is already selected. Open the gear icon on any row if you want to change quality, dimensions or codec before converting.
- 03
下载你的 JPG
点击转换，等待该行处理完成。转换多个文件时，可以将它们全部打包为一个 ZIP 一次性下载。
PNG
Portable Network Graphics带有真正 alpha 通道的无损压缩格式，作为 GIF 的自由替代品而诞生。非常适合边缘锐利的标志、截图和界面美术；用于照片则会比较浪费，因为 JPEG 或 WebP 的体积只是它的一小部分。
- 开发者
- PNG Development Group / W3C
- 发布时间
- 1996
- 扩展名
- .png
- MIME 类型
- image/png
- 压缩方式
- 无损
- 规范
- 开放
JPG
JPEG诞生三十年后，依然是照片的默认格式。它的有损压缩会丢弃肉眼几乎察觉不到的细节，质量 75–85 是最佳区间，能大幅缩小文件而不产生可见损伤。不支持透明度。
- 开发者
- Joint Photographic Experts Group
- 发布时间
- 1992
- 扩展名
- .jpg, .jpeg, .jpe, .jfif
- MIME 类型
- image/jpeg
- 压缩方式
- 有损
- 规范
- 开放
- PNG is lossless and JPG is lossy. This direction discards some information in the encode step. In practice, many files look identical at default settings, but this is a one-way loss. Keep the PNG source if you might need a perfect copy later.
- PNG 支持透明背景，而 JPG 不支持，因此源文件中的任何透明内容都会在转换过程中被压平到一个纯色背景上。
关于 PNG 转 JPG 的常见问题
这个 PNG 转 JPG 转换器是免费的吗？
是的。在这里把 PNG 转换为 JPG 完全免费，无需账号、没有水印、也没有每日次数限制。处理在你自己的设备上完成，因此不存在需要转嫁给你的服务器成本。
我的 PNG 文件会被上传到任何地方吗？
For browser-based pairs, your file is read locally and converted by Squoosh in this tab. No file payload is uploaded; you may still see analytics and engine downloads in network logs.
PNG 转 JPG 有文件大小限制吗？
There is no imposed upload cap when it runs in-browser, but each conversion still depends on your device and browser memory. Large videos are the first practical limit, then memory-heavy documents or images.
把 PNG 转换为 JPG 会损失质量吗？
JPG is a lossy format, so some detail is discarded when it is encoded. At the default quality setting the change is often not visually obvious; keep your original PNG file if you might need it again.
可以一次把多个 PNG 文件转换为 JPG 吗？
Yes. Drop in several files and each gets its own row; they are processed one after another on your device. You can download them one by one or as one ZIP.
PNG 转 JPG 能在手机、Mac 或 Chromebook 上使用吗？
Most modern browsers on Windows, macOS, Linux, ChromeOS, Android and iOS work. Very large videos are often more reliable on desktop or a browser with more memory.
Why do some conversions take longer on first run?
The conversion engine has to download first. Small codec bundles are fast, while ffmpeg is commonly 12–30 MB; later conversions of similar type use the cached engine.
I converted a file and the output is blank or unusable. What should I check?
Start over with default settings, then change one option at a time (quality, bitrate, page size, or codec) to isolate what changed behavior. If it keeps failing, retry with a smaller file and confirm the source format matches the pair.
将其他格式转换为 JPG
此处共有 16 种格式可以转换为 JPG。
将 PNG 转换为其他格式
一个 PNG 文件可以转换为以下任意一种格式。