How to convert PNG to JPG: on Windows, open the PNG in Paint and choose File > Save as > JPEG picture. On a Mac, open it in Preview, choose File > Export and pick JPEG at 80–90% quality. A photo usually shrinks 3–10×. Any transparent background turns solid, usually white, so keep PNG for logos and cutouts.
PNG is lossless, which makes it perfect for graphics, screenshots and transparent cutouts, and wasteful for photos: a 2000×2000 product photo is often 3–8 MB as PNG and well under 1 MB as JPG. This guide covers how to convert PNG to JPG on Windows, Mac, iPhone and online, how to do a batch, what happens to transparency, and the cases where you should not convert at all. For a quick batch, our free PNG to JPG converter handles up to 20 files in your browser and fills transparent areas with white.
- Windows: Paint > File > Save as > JPEG picture, or Photos > Save as > JPG.
- Mac: Preview > File > Export > JPEG, or select files in Finder > Quick Actions > Convert Image for a batch.
- Online: our free image compressor converts up to 20 PNGs to JPG in your browser and fills transparency with white.
- Transparency is lost. JPG has no alpha channel; see-through areas become white or black.
- Don't convert logos, text graphics, screenshots or cutouts you'll place on other backgrounds.
Should you convert PNG to JPG?
Convert when the image is a photo and file size matters; keep PNG when it has transparency, sharp text or flat graphics.
| Image type | Convert to JPG? | Why |
|---|---|---|
| Product photo on a solid background | Yes | Much smaller file, no visible quality loss at 80–90 |
| Amazon or Walmart main image on white | Yes | JPEG is the recommended format |
| Transparent product cutout | No | The background would turn solid |
| Logo or icon | No | Edges blur and transparency is lost |
| Screenshot or graphic with small text | Usually no | JPG adds fuzzy artifacts around text |
| Infographic with photos and text | Depends | JPG at quality 90 is often fine; check the text |
For a full comparison, including WebP, read JPG vs PNG vs WebP for product images.
What happens to transparency when you convert PNG to JPG?
It's replaced with a solid color, because JPG can't store transparency. Most tools fill it with white, some with black, and a few let you choose. A cutout bottle on a transparent background becomes a bottle on white, which is exactly what you want for an Amazon main image and exactly what you don't want for a logo you plan to drop onto a colored banner.
- Paint (Windows): usually fills it with white, and may warn you first.
- Preview (Mac): usually fills with white, but results vary by version; check the file.
- Photoshop: flattens onto a matte color you choose in the Export or Save a Copy dialog.
- Our free compressor: fills with pure white.
Some apps and older converters fill transparency with black. Convert again with a tool that fills white, or in Photoshop or GIMP add a white layer underneath before exporting.
How to convert PNG to JPG on Windows
- Right-click the PNG and choose Open with > Paint.
- Choose File > Save as > JPEG picture.
- Name the file, pick a folder and click Save. Click OK if Paint warns about transparency.
The Photos app also works: open the image, click the three-dot menu, choose Save as and set the type to JPG. Paint gives no quality control. For a batch, or to choose JPG quality, use the browser method below, or free tools like IrfanView (File > Batch Conversion) or XnConvert.
How to convert PNG to JPG on a Mac
- Open the PNG in Preview.
- Choose File > Export.
- Set Format to JPEG and drag the quality slider to about 80–90%. Preview shows the resulting file size.
- Click Save.
For a batch, select the PNGs in Finder, right-click and choose Quick Actions > Convert Image, then pick JPEG and Actual Size. The JPGs are saved next to the originals. This Quick Action has been in Finder since macOS Monterey.
How to convert PNG to JPG on iPhone and Android
- iPhone: save the PNG to the Files app, press and hold it and choose Quick Actions > Convert Image > JPEG. Select several files first to convert them together.
- Android: gallery apps vary by maker, so a browser converter is the most reliable free option.
How to convert PNG to JPG online for free
- Open our free image compressor and converter. No sign-up.
- Drop in up to 20 PNG files.
- Choose JPG and a quality; 80 is the default, 85–90 for detailed product photos.
- Optionally cap the longest side, for example at 2000 px.
- Download each JPG or all of them as a ZIP.
It runs in your browser, so nothing is uploaded, and it shows how much each file shrank. Transparent areas become white.
How much smaller is a JPG than a PNG?
For photos, usually 3 to 10 times smaller; for flat graphics, sometimes not smaller at all.
| Image | Typical PNG | Typical JPG (quality 80–90) |
|---|---|---|
| 2000×2000 product photo | 3–8 MB | 300 KB–1 MB |
| 1080×1350 social photo | 1.5–3 MB | 150–400 KB |
| Logo, flat colors | 20–100 KB | Similar or larger, with blurry edges |
| Screenshot with text | 200 KB–1 MB | Smaller, but text looks fuzzy |
These are typical ranges, not guarantees; detail, noise and dimensions all change the result. If the file is still too big after converting, our guide on how to reduce image file size covers resizing and quality settings.
Which format do marketplaces want?
JPG is the safest choice for listing photos; PNG is accepted almost everywhere too.
| Platform | Accepts PNG? | Recommended |
|---|---|---|
| Amazon | Yes | JPEG |
| Etsy | Yes | JPG |
| eBay | Yes | JPEG |
| Shopify | Yes | PNG or JPEG; Shopify serves WebP/AVIF itself |
| Walmart | Yes | JPEG |
Marketplace format recommendations were checked in October 2026. Marketplaces change their rules, so confirm the current requirements in your seller dashboard before you upload a large batch.
Uploading a PNG isn't wrong; it's just larger. The exception is a transparent PNG as a main image: marketplaces that require a white background may display transparency as white, grey or black, so flatten it onto pure white first.
Need the opposite, a clean transparent PNG of your product? Cut it out in one click, then export a white JPG version for listings.
Remove a background7 days free · 50 credits · No credit cardPNG to JPG for product photos: the right order
- Keep a master PNG of any cutout so you can place it on other backgrounds later.
- Flatten it onto the background you need: pure white (RGB 255,255,255) for Amazon and Walmart, or a brand color for your store.
- Resize to the channel's size with the free marketplace image resizer.
- Export as JPG at quality 80–90.
- Check edges at 100% zoom for halos left by the cutout.
AiArter's white background tool (4 credits) does the cutout and the pure white background in one step, with the product centered at about 85% of a 2000×2000 frame. The transparent PNG cutout is also 4 credits if you want the master file. Background techniques are covered in how to make a product photo background white and how to make a product image transparent. For other formats, see WebP to JPG.
Frequently asked questions
How do I convert PNG to JPG without losing quality?
Export at JPG quality 85 to 95 from Preview, Photoshop or a converter with a quality slider. JPG is always slightly lossy, but at that range the difference isn't visible in photos. Keep the PNG as a master copy.
Why does my PNG get a black background when converted to JPG?
JPG can't store transparency, so the converter fills transparent areas with a color, and some choose black. Use a tool that fills white, or add a white layer behind the image before exporting.
Is JPG or PNG better for product photos?
JPG for most product photos: smaller files and accepted everywhere. PNG for transparent cutouts, logos and graphics with small text, where JPG would blur edges or lose transparency.
How do I convert PNG to JPG on Windows 10 or 11?
Open the PNG in Paint and choose File > Save as > JPEG picture. The Photos app's Save as option also works. For many files, use a batch converter or a browser tool.
Does converting PNG to JPG reduce file size?
For photos, yes, often by 3 to 10 times. For logos and flat graphics, the JPG can be about the same size or larger and will look worse, so keep those as PNG.
Can I convert multiple PNG files to JPG at once?
Yes. Use Finder's Convert Image Quick Action on a Mac, the Files app on iPhone, IrfanView or XnConvert on Windows, or AiArter's free compressor, which converts up to 20 files at a time in the browser.
Upload a product photo and get a pure white 2000×2000 main image, a transparent cutout or a lifestyle scene, with the product kept as you shot it.
Start free trialSee product photos7 days free · 50 credits · No credit card. Trial images carry a small “Made with aiarter” mark; paid plans export clean files you can use commercially.
