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转变 PNG 至 JPG

转换你的 PNG 至 JPG 毫不费力地记录文件

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如何转换 PNG 至 JPG

第一步:上传您的 PNG 使用上方按钮或拖放方式上传文件。

步骤 2:点击“转换”按钮开始转换。

步骤 3:下载转换后的文件。 JPG 档案


PNG 至 JPG 转换常见问题解答

How do I convert PNG to JPG for the modern web?
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Drop your PNG file into the picker and our encoder produces a JPG output tuned for web delivery: quality factor 80 by default (a Lighthouse sweet-spot), correct color space, and an Accept-aware fallback you can ship behind a `<picture>` element alongside the original PNG.
Almost always when going from PNG / JPG / TIFF into WebP or AVIF: expect 25-50% smaller than JPG at the same visual quality, 60-90% smaller than PNG. Going the other way (WebP / AVIF back to JPG = PNG / JPG) typically grows the file because you are leaving a more modern codec for an older one — useful for compatibility, not size.
Transparency survives when JPG supports alpha (PNG, WebP, AVIF, GIF, TIFF, SVG). Converting to JPG flattens the alpha channel onto white — if you need transparency on the modern web target WebP or AVIF instead of JPG.
Yes for JPG formats that store ICC profiles (PNG, JPG, WebP, AVIF, TIFF). Modern wide-gamut profiles like Display P3 round-trip through WebP and AVIF; sRGB profiles round-trip through every common JPG. If JPG cannot store a profile, output is tagged sRGB to keep browsers from guessing.
Lossy JPG (WebP / AVIF / JPG) accepts a quality 1-100, default 80. Lossless JPG (PNG / WebP lossless / TIFF) does not take a quality dial — every pixel is preserved. WebP and AVIF are the only formats that can do either, which is why they are ideal JPG targets when source PNG mixes photos and graphics.
At quality 80+ on WebP / AVIF the difference is invisible to anyone but a trained eye even at 3x device pixel ratio. Photos compress slightly more visibly than line art; if your PNG is screenshots or UI mockups, push quality to 90 or use a lossless JPG.
Animated PNG (animated WebP, GIF, APNG) survives only when JPG is also animation-aware (animated WebP, GIF, APNG). Converting an animated PNG to a static JPG (PNG, JPG, AVIF still) yields just the first frame — use a dedicated animation converter if you need to keep all frames.
Yes by default when both PNG and JPG support EXIF (JPG, PNG, WebP, TIFF, HEIC). Camera fields (ISO, shutter, lens, GPS) are copied through. Use the "strip metadata" option if you are publishing to the web and want to drop GPS coordinates before JPG leaves your browser.
Yes — drop multiple PNG files at once and they encode in parallel. Free accounts: 100 MB per file. Pro accounts get more parallel workers and bigger per-file caps, so a 200-image gallery typically finishes in well under two minutes.
Yes — uploaded PNG files are processed in isolated workers and deleted within minutes. No human reviews the pixels, no copy is retained, no third party gets a feed. See /privacy/ for the precise retention window.
Use a `<picture>` element: `<picture><source srcset="image.JPG" type="image/JPG"><img src="image.PNG" alt=""></picture>`. Browsers that understand JPG fetch the smaller file; older browsers fall back to PNG. WebP is supported in 96%+ of installed browsers, AVIF in 90%+.
A PNG that is already heavily compressed (low-quality JPG) often grows when re-encoded into a lossless JPG (PNG / TIFF). A high-bitrate lossless PNG (PNG / TIFF) often shrinks 60-90% when going to a lossy modern JPG (WebP / AVIF). Image content matters too — photos compress very differently from line art and screenshots.

PNG

PNG 文件支持透明度并使用无损压缩,因此非常适合用于图形、徽标和屏幕截图。

JPG

JPG 文件采用针对照片优化的有损压缩,在保持视觉质量的同时,提供较小的文件大小。


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