JPEG Won't Open? Convert to PNG Instantly
Fast, instant JPEG to PNG conversion. No signup required. Just drop your .jpeg file and get .png in seconds.
Batch Settings
Converting to PNG won't restore lost quality
Your JPEG file has already undergone lossy compression. Converting to PNG preserves what's left — it prevents further degradation from re-saving — but it will not magically sharpen a blurry image or recover discarded audio frequencies.
Some metadata may not survive
Your JPEG file may contain EXIF, IPTC, XMP metadata. PNG has limited or no support for these metadata types. Location data (GPS), camera settings, and color profiles may be stripped during conversion.
您是否经常遇到这样的情况：一张心仪的图片，想用作微信头像却发现背景不透明，或者游戏截图需要透明背景叠加到其他画面上？JPEG虽然常见，但在处理透明背景时就显得力不从心了。这时候，PNG就成了您的得力助手。PNG格式不仅能完美保留图像的清晰度，更重要的是它支持透明背景，让您的图片处理和分享变得更加灵活自由。无论是电商产品图、社交媒体分享，还是制作个性化表情包，将JPEG转换为PNG都能让您的视觉内容焕发新生。我们的工具操作简便，转换速度快，助您轻松实现图片格式的升级。
- 微信公众号文章配图
- 游戏角色素材叠加
- 电商商品透明背景图
在大陆和台湾地区，用户对图片透明度的需求尤其突出，特别是在制作微信表情包、Line贴图或手游界面设计时，PNG的透明特性是JPEG无法替代的。
About JPEG to PNG Conversion
Dealing with a JPEG file that won't open on your device? You're not alone — JPEG compatibility issues are one of the most common reasons people search for a file converter. JPEG uses lossy compression optimised for photographic content, balancing quality against file size.
The fix is simple: convert your JPEG to PNG. PNG uses lossless compression and supports transparency, making it perfect for graphics, logos, and screenshots. This conversion lets you preserve files for long-term archival, solving the problem in seconds rather than hours of troubleshooting.
Full Name: JPEG uses JPEG Image, while PNG uses Portable Network Graphics. Compression: JPEG uses Lossy, while PNG uses Lossless. Transparency: JPEG uses No, while PNG uses Yes. Converting JPEG to PNG maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert processes your JPEG file on secure servers in Germany — upload, convert, download. Your files are encrypted via TLS and automatically deleted within 24 hours. No account needed, no software to install, and it works on any device with a browser.
This conversion is ideal when you You need a file that works in web browsers, or when you You need maximum device and software compatibility. Common misconception: ""Converting JPEG to PNG will improve the quality"" — in reality, no. jpeg has already permanently discarded data during compression. converting to png preserves what's left but cannot restore lost detail. the file will just be larger.
The conversion engine behind CocoConvert uses FFmpeg, Sharp, and qpdf — the same open-source libraries trusted by Netflix, YouTube, and enterprise platforms. Pro users can batch convert up to 100 files at once.
How to Convert JPEG to PNG
- 1
Add your JPEG file
Drag and drop your .jpeg file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick PNG output
Select .png as the target format. CocoConvert automatically applies the best quality settings for this conversion.
- 3
Start conversion
Hit the Convert button. The image engine processes your file server-side — no CPU drain on your device.
- 4
Save your file
Once done, download your .png file. For batch jobs, download all at once as a zip.
What Happens When You Convert JPEG to PNG
Your JPEG image is decoded into raw pixel data, then re-encoded as PNG. Current quality is preserved as-is — no further degradation.
Your JPEG file is decoded — the compressed/stored pixel data is expanded into raw RGB pixels
Pixels are re-encoded using Portable Network Graphics's lossless compression
Metadata (EXIF, ICC profiles) is transferred where PNG supports it
The PNG file is saved and ready for download
JPEG vs PNG — Detailed Comparison
| Feature | .JPEG | .PNG |
|---|---|---|
| Full Name | JPEG Image | Portable Network Graphics |
| Compression | Lossy | Lossless |
| Transparency | No | Yes |
| Animation | No | No |
| Color Depth | 8 bits/channel (24-bit color) | 8 or 16 bits/channel (up to 48-bit color) |
| HDR Support | No | No |
| Typical File Size | 2–5 MB per photo | 5–20 MB per photo, <1 MB for graphics |
| Platform Support | Universal | Universal |
| Browser Support | Universal | Universal |
| Year Created | 1992 | 1996 |
| Open Standard | Yes | Yes |
Should You Convert JPEG to PNG?
When to Convert
- ✓You need a file that works in web browsers
- ✓You need maximum device and software compatibility
When NOT to Convert
- ✗You're hoping to improve image/audio quality — converting lossy to lossless cannot recover lost data
Common Mistakes When Converting JPEG to PNG
"Converting JPEG to PNG will improve the quality"
No. JPEG has already permanently discarded data during compression. Converting to PNG preserves what's left but cannot restore lost detail. The file will just be larger.
Frequently Asked Questions
Why won't my JPEG file open?
JPEG files may not open if your device lacks the right codec or application. Converting to PNG — a more widely supported format — usually resolves this. PNG uses lossless compression and supports transparency, making it perfect for graphics, logos, and screenshots.
Is it safe to convert JPEG to PNG online?
Yes. CocoConvert encrypts your file via TLS, processes it on isolated servers in Germany, and permanently deletes it within 24 hours. Your files are never shared or analysed.
Will I lose quality converting JPEG to PNG?
Converting JPEG to PNG maintains high quality with CocoConvert's optimised encoder settings. CocoConvert uses high-quality encoder defaults to preserve as much fidelity as possible.
How large can my JPEG file be?
Free users can convert files up to 250 MB each. Pro users get a 5 GB limit per file, and Business API users have custom limits.
Can I convert JPEG to PNG on my phone?
Absolutely. CocoConvert works in any modern browser — iOS Safari, Android Chrome, and all desktop browsers. No app required.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.