Free Image Converter

JPG 转 PNG 转换器

在浏览器中在线将 JPG 转换为 PNG。为需要清晰边缘或无损保存的屏幕截图、图形、图标和图像创建 PNG 副本。

无需注册 批量转换 Files auto-deleted
图像转换图标
JPG
照片图像
to
PNG
Lossless image

也可将文件拖放到此处,单个文件最大 1 GB。

请先选择文件,再开始转换。

上传 JPG 文件后,从输出格式菜单中选择 PNG 并开始转换。

为什么要将 JPG 转换为 PNG?

JPG 非常适合照片,但 PNG 更适合屏幕截图、标志、界面图像、线条艺术和带文本的图形,因为它在保存后能保持边缘清晰。

使用 PNG 进行干净的编辑

当你需要重复编辑图像、将其放入设计工具中,或在准备 Web 资产时避免另一轮 JPG 压缩时,PNG 副本会很有用。

专为快速图像工作流程打造

使用此 JPG 到 PNG 转换器转换产品照片、社交图形、下载的图像、缩略图、屏幕截图和设计素材,每个文件最大 1 GB。

如何在线将 JPG 转换为 PNG

  1. 1

    上传您的 JPG 或 JPEG 图像文件。

  2. 2

    Choose PNG as the output format and start the conversion.

  3. 3

    Download your PNG image when processing is complete.

常见问题解答

我可以在线免费将 JPG 转换为 PNG 吗?

是的。上传 JPG 或 JPEG 图像,选择 PNG 作为输出格式,然后免费下载转换后的 PNG 文件,无需注册。

将 JPG 转换为 PNG 会使图像透明吗?

不。将 JPG 转换为 PNG 会保留可见图像,但它无法重新创建原始 JPG 文件中不存在的透明度。

JPG 到 PNG 的转换会提高图像质量吗?

PNG 使用无损压缩,因此新的 PNG 不会增加额外的 JPG 压缩损伤。它无法恢复原始 JPG 中已丢失的细节。

什么时候应该使用 PNG 而不是 JPG?

PNG 适用于屏幕截图、带文本的图形、图标、UI 图像、绘图以及需要清晰边缘或需要重复编辑而不会产生新的压缩损失的文件。

我可以一次将多个 JPG 文件转换为 PNG 吗?

是的。添加多个 JPG 图像,选择 PNG 作为目标格式,然后一起转换它们。每个上传文件最大可达 1 GB。

我的 JPG 图像是私密的吗?

Files are processed securely and automatically deleted after conversion. Your images are not kept for long-term storage.

What happens when JPG becomes PNG

源格式

JPG uses lossy compression and does not support transparency.

目标格式

PNG uses lossless compression and supports full transparency.

什么变化

The JPG pixels are decoded and written using PNG compression and color capabilities.

保留了哪些内容
Pixel dimensions and visible composition are preserved unless resize or crop settings are selected.
What may be lost
Layers, editable vectors, camera-raw controls, animation, high bit depth, and metadata are preserved only when PNG supports them.
Codec and quality implications
Writing PNG without further lossy compression avoids additional codec loss, but it does not restore detail discarded by the JPG encoding.
Realistic limitations
Multi-page, layered, animated, camera-raw, or very large images may be flattened, reduced to one frame, or rejected if the decoder cannot safely read them.

转型步骤

  1. Upload a JPG file no larger than 1 GB.
  2. Confirm that PNG is selected as the target.
  3. Start the conversion. A healthy compatible worker begins processing immediately.
  4. Download the PNG file and check the result before deleting your source.

麻烦解决

The JPG file is rejected or will not open.
Confirm that the file is not empty, password-protected, or corrupt and that its real format matches the extension.
The PNG file is larger than expected.
Choose a more efficient codec or lower quality setting when available. Lossless and uncompressed targets are often larger by design.
Transparency, color, or animation changed.
Choose a target that supports the needed feature and keep the original file; JPG cannot store transparency or animation.

隐私和文件保留

Uploads and converted files are processed automatically and irreversibly deleted within 24 hours. You can delete them sooner with the delete control. Convertr does not read, mine, sell, or manually review file contents.

Read the privacy policy