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Convert JPG to PNG
Convert JPG images to PNG format — get lossless quality with full transparency support for graphics and logos.
Quality 100%PNG无需登录文件保持私密
将文件拖放到此处或点击浏览
JPG, PNG, WebP, AVIF, GIF, BMP 无文件大小限制
你可以一次拖放多个文件
你的文件永远不会离开你的设备。所有处理都在你的浏览器中本地进行。
JPG to PNG tips
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PNG is lossless — every pixel is preserved exactly. Great for screenshots, logos, and graphics with text or sharp edges.
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PNG supports transparency (alpha channel). JPG does not — if you need transparent backgrounds, PNG is the right choice.
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PNG files are typically 5–10× larger than JPG for photos. Only convert to PNG when you need the quality or transparency.
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Converting JPG → PNG doesn't restore lost quality — JPG artefacts from the original compression remain visible.
工作原理
1
选择文件
Drop your file into the tool above. It stays entirely on your device — nothing is sent to any server.
2
处理
The JPG to PNG preset (quality 100%) is applied automatically. Adjust any setting you like.
3
下载
Get your result instantly. Nothing is stored after you leave the page — complete privacy.
为什么选择我们的？
✓完全免费——永远没有隐藏费用
✓无需账号、邮箱或登录
✓文件永远不会离开你的设备
✓绝无文件大小限制
✓JPG to PNG-optimised preset applied automatically
✓所有输出均无水印