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Initurn

Convert PNG to JPG

Files never leave your device. All processing happens in your browser.

Lower means a smaller file. Above 90 the file grows fast for little visible gain.

Pixels. Leave empty to keep the original dimensions.

JPG has no transparency, so see-through areas are filled with this colour.

How to convert PNG to JPG

  1. 1

    Drop your PNG files in, or tap the box to pick them from your device.

  2. 2

    Set the quality and, if the image has transparency, choose a background colour.

  3. 3

    Compare the new file size against the original, then download.

Almost everyone arrives at this conversion for the same reason: a PNG is too big. Screenshots, exported designs and phone screen recordings all land as PNG files running to several megabytes, and something — an email attachment limit, an upload form, a website that keeps rejecting the file — wants them smaller. JPEG is the format that solves that, at a cost worth understanding before you convert.

The transparency problem

This is the single thing that goes wrong most often, and it is worth reading even if nothing else here is. PNG can store transparent pixels. JPEG cannot — the format has no alpha channel and no way to represent "nothing here". So every transparent pixel has to become some actual colour during conversion.

Many converters silently fill those pixels with black, which is why a logo with a clean transparent background so often comes back sitting in an ugly dark rectangle. This tool lets you pick the fill colour instead, defaulting to white. Set it to match wherever the image is going: white for documents and most web pages, or the exact background colour of the slide or page you are pasting into.

How much smaller will it get?

For a photograph saved as PNG, expect a reduction of 80–95%. A 6 MB PNG photo routinely comes out under 500 KB with no visible difference. For screenshots of text and interfaces, the saving is real but smaller, and the trade-off is less comfortable — JPEG handles hard edges badly, so small text can pick up a faint fuzz around the letters.

The quality slider controls this directly. Around 80 is the sweet spot for photographs; for screenshots containing text, push it to 90 or above, or consider whether WebP would serve you better since it keeps text sharper at the same file size.

JPEG is lossy, and it stays that way

  • Once converted, the discarded detail is gone. Keep the PNG if it is your only copy of an original.
  • Do not convert back and forth. Each JPEG save re-compresses the image and adds a little more damage.
  • Editing a JPEG and re-saving it degrades it again, so do your editing first and convert last.

When to keep the PNG instead

Some images should not become JPEGs. Logos, icons, line art, diagrams and anything with large flat colour areas and sharp boundaries are exactly what JPEG is worst at, and often the JPEG is not even much smaller. Screenshots of code or spreadsheets fall into the same category. If the image needs a transparent background in its final home — a logo over a coloured header, for instance — converting to JPEG destroys that permanently.

Everything here runs inside your browser tab. The PNG is decoded, drawn onto a canvas over your chosen background colour, and re-encoded as JPEG on your own device. Nothing is uploaded, so a 50 MB screenshot is limited only by your own memory.

Questions about PNG to JPG

Why did my transparent background turn black?

That is what happens when a converter drops the alpha channel without filling it in first. JPEG has no way to store transparency, so those pixels must become a real colour. Use the background colour picker above to choose what they become — white is the default and suits most uses.

How much smaller will my file be?

For photographs, typically 80 to 95 percent smaller. For screenshots and flat graphics the saving is smaller because PNG already compresses those well. The result size is shown before you download, so you can adjust the quality and try again.

What quality setting should I use?

Start at 80 for photographs — most people cannot tell it from the original. For screenshots with text, use 90 or higher, because JPEG blurs sharp edges and small lettering suffers first. Above 95 the file grows quickly for very little visible gain.

Will converting to JPG reduce the image dimensions?

No, the pixel dimensions stay the same unless you set a limit in the resize field. Only the file size changes. If you need smaller dimensions too, enter a longest-edge value and both are reduced at once.

Can I convert the JPG back to PNG later?

You can, but it will not restore the lost detail. The JPEG compression is permanent, and converting back simply wraps the damaged image in a lossless container. Keep your original PNG if you may need it.

Is JPG or JPEG correct?

They are the same format. The three-letter extension is a leftover from older versions of Windows that only allowed three characters. This tool produces files ending in .jpg, which every program and website accepts.

Does this work on a phone?

Yes. The tool is built to work on small screens and converts using your phone’s own processor. Very large files may be slower than on a desktop, since your device memory is the limit rather than an upload allowance.

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