Which image formats can I convert between?

Common web formats including PNG, JPG, WebP, GIF, BMP and AVIF, in both directions.

Are my images uploaded?

No. Conversion runs entirely in your browser, so your pictures never touch a server.

Converting to a lossless format like PNG keeps full quality; JPG and AVIF use compression you can tune.

Yes, add multiple files and each one is converted to your chosen output format.

A few browsers cannot encode AVIF; when that happens the tool falls back to PNG and tells you.

Transparency is kept for formats that support it (PNG, WebP, AVIF) and flattened for JPG, which has no alpha channel.

在线将 JPG 文件转为 PNG。免费、浏览器内完成、无需上传。

文件

将文件拖放到此处 点击或拖放添加文件。可用箭头调整顺序。

Output

Quality 85%

Max width (px) Strip metadata

使用方法

Format info

将 JPG 转为 PNG 会把照片封装进无损容器，便于日后添加透明背景或避免编辑时产生更多压缩伪影。PNG 无法恢复 JPG 已丢弃的细节，文件会变大但清晰度不会明显提升。Frespy 在浏览器中本地处理，无需上传服务器。

JPG: JPG 是常见的文件格式。使用 Frespy 可在浏览器中免费转换相关格式。

PNG: PNG 是常见的文件格式。使用 Frespy 可在浏览器中免费转换相关格式。