JPG to PNG Converter Online — Convert Images Locally
Convert JPG to PNG online in your browser without uploading the image. Create a lossless PNG copy at the original pixel dimensions.
Your image is processed locally and is not uploaded.
About this tool
This online JPG to PNG converter decodes the selected JPEG, draws it at its original dimensions and creates a PNG download. PNG avoids further lossy encoding, but converting an existing JPG cannot restore detail already removed by JPEG compression.
How to use
- Choose the JPG or JPEG image you want to convert.
- Process the image locally in your browser.
- Download the PNG and compare its dimensions, appearance and file size.
Features
- Creates standard PNG output at the source dimensions.
- Runs locally with browser canvas APIs.
- Leaves the original JPG file unchanged.
Common use cases
- Create PNG input for software that requires that format.
- Avoid an additional lossy JPG encoding step during later editing.
- Use a broadly supported lossless container for an existing image.
Common issues and tips
- The PNG output may be larger than the original photographic JPG.
- Conversion cannot remove compression artifacts already present in the JPG.
Privacy
JPG to PNG conversion runs locally in your browser. The selected image is not uploaded to Tools12345.
Frequently asked questions
Will converting JPG to PNG improve quality?
No. PNG prevents additional lossy encoding, but it cannot recreate image detail that the original JPG discarded.
Will the PNG have a transparent background?
No. A normal JPG has no transparency, so conversion does not create transparent areas automatically.
Why is the PNG file larger?
PNG uses lossless compression, which is often less compact than JPEG for photographs and complex imagery.