Convert JPG to PNG Online
Convert JPG photos to PNG for lossless editing and layouts that need an exact pixel workflow. Standard JPG to PNG runs in the browser where Canvas can decode the source, with a server fallback. It is free, supports batches, and accepts server uploads up to 100 MB.
Convert .JPG to .PNG
Select a file to begin. Processing details and limits are listed below.
How to convert JPG to PNG
- 1
Add your JPG files
Drop one or more .jpg files into the uploader. The browser path keeps the standard conversion local when Canvas can decode the image.
- 2
Check the output settings
PNG is the fixed target for this tool. Use the options panel if you need a specific width or height before encoding.
- 3
Convert and download
Start the queue, then download each PNG or bundle the finished files into a ZIP.
JPEG image vs Portable Network Graphics
| Spec | JPEG image | Portable Network Graphics |
|---|---|---|
| MIME type | image/jpeg | image/png |
| Format type | image | image |
| Standard | ISO/IEC 10918 | ISO/IEC 15948 |
| First release | 1992 | 1996 |
| Browser support | All current major browsers | All current major browsers |
| Contents | Lossy DCT-compressed raster image with 8-bit color channels and optional EXIF metadata. | Lossless DEFLATE-compressed raster image with optional alpha transparency and animation through APNG. |
About JPEG image
Very small files for photographs, universal application support, and an adjustable quality setting. Lossy compression can create block and ringing artifacts; it has no alpha transparency and is poor for sharp line art or screenshots.
Format referenceAbout Portable Network Graphics
Pixel-perfect lossless output, clean alpha transparency, and strong support for screenshots, logos, and line art. Photographic images are usually much larger than JPEG or WebP; metadata and animation support vary by viewer.
Format referenceWhy convert JPG to PNG?
- PNG avoids another round of JPEG compression while you edit, crop, or composite the image.
- PNG is a better handoff format for design tools that expect lossless pixels and clean alpha handling.
- Some publishing and screenshot workflows reject JPEG because it has no alpha channel and softens sharp edges.
- A PNG working copy makes repeated exports more predictable than editing the original JPEG again and again.
Will quality change?
The visual detail already lost inside the JPEG cannot be recovered. What changes is the compression model: PNG stores the decoded pixels losslessly, so later edits and re-exports do not add new JPEG artifacts. JPG to PNG cannot create transparency because the source has no alpha channel, and the PNG file will usually be larger.
Processing and limits
- Processing
- Browser first, server fallback
- Engine
- Browser Canvas, with Sharp as the server fallback
- Maximum size
- Server fallback accepts files up to 100 MB. Browser conversions are limited by available device memory.
- Batch support
- Yes, multiple JPG files can be queued and converted together.
- Quality controls
- PNG is lossless, so there is no quality slider. Output dimensions can be adjusted when needed.
The browser decodes the JPEG, draws it to a canvas, and encodes PNG on your device. If the browser cannot complete the encode, the file is sent to the server and processed with Sharp. The result is downloaded directly.
- Transparency is not restored because the source JPEG contains no alpha data.
- Compression artifacts, soft edges, and color shifts already present in the JPEG remain visible.
- PNG files are often several times larger than the original JPEG, especially for detailed photos.
Platform compatibility
PNG is supported natively on Windows, macOS, Linux, iOS, and Android, and every current major browser can display it. That makes the output safer for screenshots, design handoffs, and applications that cannot open newer image codecs.
When not to convert
- Skip this conversion when the only goal is a smaller file for email or a web page, because PNG will usually be larger.
- Do not convert when you need a transparent background; the source JPEG has no alpha channel to preserve.
- For archival edits, keep the original JPEG as well as the PNG so you can compare the decoded result.
Frequently asked questions
- Does converting JPG to PNG improve image quality?
- No. The JPEG has already discarded detail, and PNG only stores the decoded result without adding more loss. It can prevent further generation loss, but it cannot recreate the original scene detail.
- Will a JPG to PNG conversion add a transparent background?
- No. JPEG has no alpha channel, so there is no transparency to carry into PNG. The output is fully opaque even though PNG supports alpha.
- Why is the PNG file larger than the JPG?
- PNG uses lossless compression, which preserves every decoded pixel. JPEG uses lossy compression tuned for photographs, so it usually produces a much smaller file at the cost of detail.
- Is the JPG uploaded to a server?
- The standard path runs in your browser when the Canvas encoder is available. If the local encode fails, the file is sent to the conversion server for a Sharp fallback and deleted after processing.
- Can I convert several JPG files at once?
- Yes. Add multiple files to the queue, convert them together, and download them individually or as a ZIP archive.
- When should I choose PNG instead of JPG?
- Choose PNG for screenshots, logos, text-heavy graphics, repeated editing, or any workflow that needs lossless pixels. Choose JPG for photographs where small file size matters more than perfect detail.