What the converter does
- Preserves the source width and height.
- Creates a PNG file in your browser.
- Keeps the source file untouched.
Free JPG to PNG Converter
Convert JPG images to PNG without changing their pixel dimensions.
Runs on your device — no upload required
Drop or choose imagesChoose files from your device or drag them hereYou can also paste an image with Ctrl+V / Cmd+V.
JPG to PNG changes the file encoding while preserving the original pixel dimensions. There is no hidden resize and no server upload.
How OpenFileTools processes it
Local processing, explicit choices.
OpenFileTools decodes the source into a temporary browser canvas and encodes the selected format locally. Closing the page releases the working data.
Quick technical summary
What this tool changes.
| Property | Behavior |
|---|---|
| Processing | Browser only; no image upload |
| Original | Never changed |
| Dimensions | Preserved |
| Quality restoration | None |
A new container cannot restore old detail
PNG output preserves the JPG's current pixels and dimensions, but cannot reverse artifacts or recover detail already lost during JPG compression. The PNG may be much larger because it encodes those existing pixels differently.
- Converting does not make the original capture lossless retroactively.
- Use PNG when a destination or editing workflow specifically requires it.
- Keep the source JPG unchanged.
Questions, answered.
Will PNG improve JPG quality?
No. It cannot reconstruct detail lost before conversion.
Why is the PNG larger?
PNG uses lossless pixel encoding and can be inefficient for photographic content.
Does the PNG gain transparency?
No. Converting does not invent transparent areas.
When is PNG useful?
Use it when a compatible editor, asset pipeline, or upload form specifically needs PNG.