PNG to JPG Converter

Convert PNG images to JPG to make them dramatically smaller. Transparent areas are flattened onto white, and nothing is uploaded anywhere.

Runs entirely in your browser. Nothing is uploaded.

FromPNGLossless, transparency
Swap: convert JPG to PNG
ToJPGPhotos, small files

0 keeps the original size.

Drop PNG files here, or

Converted on this device. Nothing is uploaded.

How to use the PNG to JPG Converter

  1. Drop in your PNG files

    Batch conversion is supported; every file uses the same quality setting.

  2. Set the quality

    Around 85% is visually indistinguishable from the original for most photographs. Lower it until artefacts appear, then step back one notch.

  3. Download the JPG

    The before and after size is shown for each file.

Transparency becomes white, not black

JPEG has no alpha channel, so every transparent pixel has to be given a colour before it can be encoded. Most browser-based converters skip this step and let the canvas default take over, which is transparent black - and that is why a logo converted to JPG elsewhere so often comes back sitting on a black rectangle.

This tool fills the canvas with white before drawing, which is what almost everyone actually wants and what the image will sit on in a document, a slide or an email. If you need it on a different colour, flatten it onto that colour in an editor first, then convert.

When PNG to JPG is worth doing

When the PNG is a photograph. This is the single biggest avoidable mistake in image handling: a photo saved as PNG is commonly five to ten times larger than a JPEG nobody could distinguish from it. Converting is close to free savings.

When the image has no transparency and is going on the web or into an email. Size matters more than the last few percent of fidelity.

It is not worth doing for screenshots, logos, diagrams or anything with text and sharp edges. JPEG compression works by discarding high-frequency detail, which is exactly what an edge is, so those images pick up visible halos and smearing around the very parts that need to stay crisp.

Frequently asked questions

What happens to the transparent parts of my PNG?
They are filled with white before encoding, because JPEG cannot store transparency. Without that step transparent areas would come out black, which is what many other converters produce.
How much smaller will the JPG be?
For a photograph, typically 5 to 10 times smaller. For a screenshot or a logo the saving is much smaller and the quality cost is much higher, so PNG is usually the better choice there.
What quality setting should I use?
Between 80 and 90 is indistinguishable from the original for most photographs. Below about 70 the artefacts become visible in flat areas like skies.
Can I convert the JPG back to PNG later?
You can, but the discarded detail and the transparency do not come back. Keep the original PNG if you might need it.