Convert PNG to JPG in your browser
Drop a PNG and Tinier converts it to JPG locally with MozJPEG. When you don't need transparency, JPG is smaller than PNG for photos and opens everywhere. Transparent areas become a white background. Nothing uploads; disconnect your internet after the page loads and it still works. Up to 50 MB per file, 1 to 20 at a time.
When to convert PNG to JPG?
Convert PNG to JPG when the image is a photo (not a logo or screenshot with sharp edges) and you don't need transparency. JPG compresses photographic content far smaller than PNG, and it opens on every app and device. If your PNG is a photo that ended up huge, converting to JPG is often the fastest way to a small, universally-openable file.
Transparency becomes white
JPG has no alpha channel, so any transparent areas in your PNG are filled with a white background during conversion. This matters most for logos and cutouts — if you need to keep the transparent background, convert to WebP instead, which supports transparency. Use the built-in comparator to see exactly how the flattened image looks before downloading.
Why convert in your browser instead of a server?
Tinier decodes PNG and re-encodes JPG locally with WebAssembly, so the PNG is never uploaded. It is faster than a server tool on files under 10 MB because there is no round-trip, and it is private by construction. No account, no rate limit, no size paywall.
Frequently asked questions about PNG to JPG
Is my PNG uploaded to a server?
No. The conversion runs entirely in your browser with WebAssembly. Your PNG never leaves your device — you can turn off your internet after the page loads and it still works.
What happens to transparency?
Transparent areas become a white background, because JPG has no transparency channel. If you need to keep the transparent background, convert to WebP instead.
Will the JPG be smaller than the PNG?
For photos, usually yes — JPG compresses photographic content much smaller than lossless PNG. For flat graphics or screenshots with sharp edges, the difference is smaller and PNG or WebP may look better.
Can I convert several PNGs at once?
Yes. Drop up to 20 PNGs and download them individually or as a ZIP. Each is processed on your device.
Related conversions
- JPG to PNG — the reverse — turn a JPG into a lossless PNG.
- PNG to WebP — shrink a PNG while keeping transparency.
- Compress JPG — compress the resulting JPG smaller with MozJPEG.