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PNG to JPG converter, with a fill for see-through areas

Drop a PNG, choose a quality, and save a JPG, free. Where the PNG is see-through, the JPG gets a colour you pick instead of a surprise. It runs in your browser and nothing is uploaded.

Converted on this computer · nothing uploaded · no signup · no watermark

Faster with the free Chrome extension: right-click any picture on a website and send it straight to the image format converter. Add to Chrome · what it does

Why people turn a PNG into a JPG

A PNG keeps every pixel exactly, which is right for a logo or a screenshot and wasteful for a photograph. A JPG throws away detail the eye is unlikely to miss, so the same photo is often several times smaller. That is why upload forms, email and some print services ask for a JPG, or set a size limit that a PNG photo will not meet.

What goes wrong with PNG to JPG

  • See-through areas. A JPG cannot be transparent. Whatever was clear in the PNG has to become a colour, and a converter that does not ask gives you black or white by accident. Here the colour is yours, and the fill box appears only when the picture has transparent areas.
  • Fuzz round sharp edges. JPG compression works in small blocks, so thin lines and lettering can pick up a faint haze at low quality. Keep the quality high for logos and text.
  • A bigger file than you expected. Flat-colour artwork can be smaller as a PNG than as a JPG. The size in kilobytes is shown before you download, so you can check.
  • Detail that does not come back. Saving a JPG back to PNG later will not restore what the JPG dropped. Keep the PNG as your master.

The settings, for this conversion

  • Quality, 1 to 100. It starts at 90, which keeps photographs clean. Go lower for a smaller file, higher for lettering.
  • Fill for transparent areas. White by default. Pick the colour of the paper or the page the picture will sit on.
  • Resolution. The dpi written into the JPG. It does not change the pixels; it tells print software how large to make them. 300 dpi on a 1500 pixel picture means 5 inches.

How to do it

  1. Drop the PNG on the page, or choose it.
  2. Leave JPG selected under Save as, set the quality, and pick the fill if you are asked.
  3. Check the size shown under Result, then download.

Open the picture here, choose how to save it, and download. Everything happens in this page: the picture is read and rewritten by your browser, with no upload and no account. You can confirm that on the Network tab of your browser's developer tools.

One picture, or a whole folder

Converting one picture at a time is free, with no watermark and no limit. If you load several, you can pick any of them to preview and save on its own. Pro converts every loaded picture in one go and saves them as one ZIP (up to 30 at a time) with a short report of what was made.

Other conversions

The same tool opens with a different pair on each page, and any picture works on any page.

Questions

What happens to the see-through parts of my PNG?

They take the fill colour, which starts as white. Partly see-through edges, such as a soft shadow, are blended into that colour, so there is no white halo round a shape you place on a coloured page. If you want the shape on a coloured background, set the fill to that colour.

What quality should I choose?

90 is a good start for photographs. Lower numbers make smaller files with more visible blocks; 95 and above suit lettering and line art. The preview shows the real result, and the size under Result changes as you move the slider.

Does it change the size of my picture?

No. The JPG has the same width and height in pixels as the PNG. Only the way the pixels are stored changes, and the pixel size is shown next to the file size.

Why is my JPG bigger than the PNG?

Flat colours and sharp edges compress very well in PNG and poorly in JPG, so a logo can get bigger. Photographs go the other way. If the JPG is larger, lower the quality, or keep the PNG.

Can I convert many pictures at once?

You can load up to 30 pictures and look at each one, but saving them one by one is free and saving them all at once is part of Pro: one ZIP with every converted file and a short report. Your first batch on a device is free to try.

Is my picture uploaded?

No. The picture is opened and rewritten by your browser, in this page, and the page has no code that sends a file anywhere. The site counts that a tool was used and that a file of a certain type was saved, never the picture or its name.