Why you might want to convert PNG to JPG

PNG and JPG are two different ways to store image files, and they make different trade-offs. PNG keeps every detail of an image exactly as it was — useful for logos, screenshots, or anything with sharp edges and solid colors. JPG throws away some detail to make the file much smaller, which matters if you're uploading to a website, sending by email, or storing hundreds of photos.

The choice between them depends on what you're doing with the image. A logo should stay PNG. A photo from your phone can become JPG and save disk space without looking noticeably worse to human eyes. If you're not sure which one you need, check what the place you're uploading to actually wants — many websites specify.

Key Takeaways

  • JPG files are smaller than PNG files, which matters for email, websites, and storage, but lose some image detail in the process.
  • On Windows, you can right-click a PNG file and use Paint or Photos to open it and save it as JPG without installing anything new.
  • On Mac, Preview (built into every Mac) opens PNG files and can save them as JPG in one menu choice.
  • Online converters like CloudConvert or Zamzar work from any device but require uploading your image to their server.
  • Batch conversion tools like XnConvert let you convert many files at once, which saves time if you have dozens of images to change.

Converting on Windows using Paint

Paint is built into every Windows computer and can open PNG files and save them as JPG. Open Paint (search for "Paint" in the Windows search box), then go to File > Open and select your PNG file. The image will appear on the canvas.

Once the image is open, go to File > Save As. A dialog box will appear. At the bottom, there's a dropdown that says "Save as type" — click it and select "JPEG Picture (.jpg)". Give the file a name, choose where you want to save it, and click Save. Paint will ask you about image quality; the default setting is fine for most uses.

Converting on Windows using the Photos app

Windows 10 and 11 come with a Photos app that also handles this task. Right-click your PNG file, select "Open with" and choose Photos. Once the image opens, click the three dots menu in the top right and select "Edit". Then click the three dots again and choose "Save a copy".

A new window will open. At the bottom, click "More options" to expand the format choices. Select JPG from the list, then click "Save a copy". The app will save a new JPG version of your image while keeping the original PNG file untouched.

Converting on Mac using Preview

Preview is the default image viewer on every Mac. Double-click your PNG file to open it in Preview. Once it's open, go to File > Export. A dialog box will appear with a dropdown menu that says "Format" — click it and select JPEG.

You can adjust the quality slider if you want (higher quality means a larger file). Give the file a name and choose where to save it, then click Save. Your new JPG file will be created in the location you chose.

Using an online converter

If you don't want to install anything or prefer not to use your computer's built-in tools, online converters work from any device. CloudConvert and Zamzar are two common options. Go to the website, click the button to upload your PNG file, select JPG as the output format, and click Convert. The site will process the file and let you read the JPG version.

The trade-off is that your image gets uploaded to someone else's server. If the image contains sensitive information, this may not be the right choice. Most of these sites delete uploaded files after a few hours, but you're trusting their privacy policy. For personal photos or public images, this is usually fine.

Converting multiple files at once

If you have many PNG files to convert, doing them one at a time is slow. XnConvert is a free program that runs on Windows, Mac, and Linux and can convert dozens or hundreds of files in one batch. read it, install it, then open the program and click "Add files" to select all your PNG images at once.

In the Output tab, select JPG as the format. You can adjust quality settings if you want. Click Convert and the program will process all your files and save them as JPG in a folder you choose. This takes minutes instead of the hour it would take to do them individually.

Understanding quality settings when you convert

When you save a PNG as JPG, you'll often see a quality slider or a number from 1 to 100. Higher numbers mean the JPG looks closer to the original image but the file stays larger. Lower numbers make the file smaller but the image may look blurry or have visible artifacts (small blocks or color shifts).

For photos, a quality setting of 75 to 85 is usually a good balance — the file is much smaller than the PNG but the image still looks good on a screen. For images with text or sharp lines, use a higher quality (90 or above) because JPG's compression method blurs edges. If you're not sure, convert at the default quality first and look at the result; you can always convert again if you want a different trade-off.

Frequently Asked Questions

Will the JPG version look worse than the PNG?

For photographs, probably not noticeably. For images with text, logos, or sharp lines, yes — JPG blurs edges. If you're unsure, open both versions side by side at full size. Most people can't see the difference in photos unless the quality is set very low.

Can I convert JPG back to PNG?

Yes, the same tools work in reverse. However, converting JPG to PNG won't recover the detail that was lost when the JPG was created. You'll have a PNG file, but it won't look better than the JPG it came from. Always keep the original file if you might need it later.

What if I need to convert hundreds of images?

Batch conversion tools like XnConvert, IrfanView, or ImageMagick (command line) can process many files at once. If you use a Mac, Automator can also create a batch conversion workflow. For a one-time job, an online converter with batch upload may be faster than learning new software.

Does the file size always get smaller when I convert to JPG?

Almost always, yes — JPG compression is designed to make files smaller. However, if you convert a very small PNG (like a tiny icon) to JPG, the file might not shrink much because there's not much to compress. The benefit is biggest with photographs and large images.

What quality setting should I use for uploading to a website?

Most websites that host photos (like social media or photo galleries) re-compress images anyway, so the exact quality you choose matters less. A setting of 80 to 85 is a safe middle ground. If the website specifies a file size limit, start at 75 and check the result.