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PNG en JPG

JPG to PNG

Convert JPG and JPEG images to PNG in your browser. Keep the original dimensions and download your files individually or as a ZIP archive.

Local processing - your images never leave your device

Add JPG images

Drop your JPG images here

JPG and JPEG only · 20 MB per file · 40 MP per image · 20 files per batch

Help

How to use the converter

Drag your images into the area or click to browse your files. Accepted files appear with a preview, their dimensions and their size. Nothing is converted until you confirm.

Processed on your device

Your images are processed on your device and are not uploaded for conversion.

No account, no watermark

No signup, no watermark added and no advertising pages.

Dimensions kept

No resizing or cropping is applied to converted images.

How to convert JPG to PNG

  1. Add your JPG or JPEG files

    Add your JPG or JPEG images from your device or drop them into the zone. Each file is checked before it is added.

  2. Check the preview

    The tool shows the original image and the converted PNG, with the original dimensions and the real size of both files.

  3. Download

    Each PNG can be downloaded on its own or grouped in a ZIP archive. One failed file does not block the others.

What the conversion does, and what it does not

PNG adds no loss to the pixels the JPG already had — nothing more.

A real PNG, with no quality setting

The output is a lossless PNG. That is why there is no quality slider: offering one would suggest a setting that never applies.

No detail restored

Converting JPG to PNG does not add detail, does not remove the compression artefacts already present, and does not make the image transparent. PNG locks in the decoded pixels: it prevents new loss, it does not undo the old one.

Size and dimensions

Original dimensions are kept. A PNG can be considerably larger than the source JPG, especially for a photograph; the interface shows the real size and flags a larger file.

Orientation

EXIF orientation is applied while decoding when the browser supports it; the dimensions shown are those of the decoded image, as displayed.

Guides

Three practical guides to choose a format, handle transparency and set quality without surprises.

PNG or JPG: which format should you choose?

Both formats are everywhere, but they answer different constraints. Here is how to choose with confidence, and what actually changes in a conversion.

Read the guide

Converting a transparent PNG to JPG

A transparent PNG converted to JPG needs a colour behind the empty areas. Prepared well, the result stays clean; prepared badly, it lands on black or with dirty edges.

Read the guide

JPG quality and file size

The quality slider is not a percentage of fidelity. Here is what it actually changes, and useful starting values.

Read the guide

Frequently asked questions

How do I convert several PNG files to JPG?
Select or drop up to 20 PNG files. The converter processes two at a time, shows progress and lets you stop at any point. When it finishes, download each JPG on its own or every successful conversion in one ZIP archive.
What happens to transparent backgrounds?
The JPG format has no transparency. Transparent and semi-transparent areas are composited onto the chosen background colour — white by default, black or a custom colour — before encoding.
Which JPG quality should I choose?
90 is a good starting point for most images. A lower value usually reduces file size at the cost of softer detail. The value shown is the JPEG encoder setting, not a guaranteed percentage of visual fidelity.
Why is the JPG sometimes larger?
Flat colour, screenshots and logos are already compressed very well in PNG. Re-encoded as JPG they can become heavier while losing sharpness. The interface shows the real size of both files and flags a larger result.
Does converting JPG to PNG improve quality?
No. PNG keeps exactly the decoded pixels of the JPG, but it does not restore detail lost in the original JPEG compression.
Does a converted JPG become transparent?
No. A JPG holds no transparency information, so the resulting PNG is fully opaque.
Are images uploaded for conversion?
No. Conversion runs in your browser with the Canvas API: the files stay on your device. Like any website, the service receives routine hosting requests; they do not carry the content of your images.
Are animated PNG files accepted?
No. Animated PNG (APNG) files are detected and rejected with a clear message: this version only converts still images.