PNG to JPG Converter
Re-save bulky PNGs as JPG to cut file size. Any transparent areas get flattened to white. Images stay on your device.
Drop PNG files here
or click to browse (multiple selection works)
Accepts: .png
Why you'd want to do this
PNG files get huge fast, especially for photos. A 5 MB PNG might compress to 500 KB as a JPG with no visible difference on screen. If you're emailing photos, posting to a site with size limits, or just trying to clean up your downloads folder, JPG is usually the better fit.
One catch: transparency
JPG doesn't support transparent pixels. If your PNG has a see-through background (a logo, an icon, a cutout), the conversion fills those pixels with white. If you need to keep transparency, use WEBP instead.
What this does
- Decodes each PNG in your browser.
- Re-saves it as a JPG at the quality you pick.
- One file in, one out. Several in, you get a zip.
Nothing leaves your browser
Conversion happens in this tab. Pull the plug on your Wi-Fi after the page loads and the converter still runs.
About the PNG format
PNG (Portable Network Graphics) was published by the W3C in 1996 as a patent-free alternative to GIF after Unisys tried to enforce its LZW compression patent. It's a fully lossless raster format with 8-bit alpha transparency, gamma correction, ICC profile support, and palette/grayscale modes. PNG compresses flat colors and sharp edges efficiently — which is why screenshots, UI mockups, and pixel art end up small as PNGs — but it bloats for photographs because the DEFLATE algorithm wasn't built for natural images. That's the entire reason this conversion to JPG exists.
About the JPG format
JPEG was specified by the Joint Photographic Experts Group in 1992 and is still the format most cameras, phones, and websites default to for photographs. It uses a discrete cosine transform plus quantization to throw away the parts of an image the human eye barely notices. The result is dramatic compression — a 5 MB photo PNG often becomes a 400 KB JPG with no visible difference. JPG has no transparency channel, no animation, and degrades when re-saved repeatedly. None of that matters for a one-shot photo export. All of it matters if the image is a logo with a transparent background.
When to use PNG to JPG (and when not to)
Pick this conversion when:
- The PNG is a photograph and you want a manageable file size for email or upload.
- You're posting to a site (forums, classifieds, marketplaces) with a hard size cap.
- You don't need transparency in the output — the image has a solid background or you're fine with white fill.
- You're freeing up disk space on a folder full of phone or screen captures.
Skip it when:
- The image is a logo, icon, screenshot of text, or anything with sharp edges. JPG smears these. Use WEBP or keep the PNG.
- You need transparency. JPG doesn't have it.
Common problems and how to fix them
- Text or sharp edges look fuzzy. JPG's DCT compression smudges anything high-contrast. For screenshots, use PNG or WEBP. If JPG is mandatory, push the quality up to 0.95.
- Transparent areas turned white. Expected — JPG has no alpha. If you wanted to keep transparency, convert to WEBP instead.
- The output is bigger than the source PNG. Rare, but happens with already-tiny PNGs (icons, sparse pixel art). PNG wins on those. Keep the original.
- Color cast or banding on gradients. JPG handles gradients poorly at lower quality settings. Bump the slider up; if that doesn't help, the source already had banding.
- EXIF orientation came out rotated. Some PNGs converted from camera HEIC carry stale orientation tags. Use a desktop tool like ExifTool to strip them before converting.
Frequently asked questions
Does this upload my PNG anywhere?
No. The PNG is decoded by the browser's Canvas API and re-encoded as JPG entirely in this tab. Open DevTools and watch the Network tab to verify.
What quality setting should I pick?
Standard (0.85) is the right default for almost everything. Use High (0.95) for photos you'll print, Compact (0.7) for thumbnails or when you specifically need a tiny file.
Can I convert dozens of PNGs at once?
Yes. Drop a whole folder in and get a single ZIP back. Limited only by your device's memory.
What happens to transparent backgrounds?
They get filled with white. If that's not what you want, use the PNG to WEBP converter instead — WEBP supports alpha.
Does it work on mobile?
Yes. Any modern Safari, Chrome, or Firefox build handles it. Larger batches just take longer on a phone.
Will quality keep degrading if I convert back and forth?
Yes — JPG is lossy. Each save throws away a little more detail. Keep the PNG as your master if you'll re-edit.