Where did my transparent background go?

It was filled with the colour you chose (white by default). That isn't our design decision — the JPG format simply has no alpha channel: each pixel stores only RGB, with nowhere to keep transparency. If you need it preserved, don't convert to JPG; stay on PNG or use WebP.

Does it lose quality?

Yes — JPG is lossy. At the default 92% most photos look indistinguishable by eye; below about 60% blocking becomes visible, especially across flat colour and around text. If the source is a screenshot, line art or anything with text, converting to JPG is usually the wrong move — PNG is both smaller and cleaner for that kind of content.

Can I convert a lot at once? Is there a cap?

Yes, and there's no cap. Dropping several switches to batch mode, where each thumbnail is itself original-vs-result, and changing the quality recomputes all of them. Speed depends on your machine, not on a limit we set — we don't set one.

Are my images uploaded to a server?

No. Decoding, conversion and encoding all happen in your browser. You can verify it: open the network panel in developer tools and convert — no request carrying image data appears.

PNG to JPG: transparent areas become white, not black

Drop it in and it's converted. You pick what fills the transparency — white by default.

or start a blank document

PNG is lossless, so photos saved as PNG are often several times larger than the same image as JPG. Size is the usual reason people convert: emailing, uploading to a site, anywhere with a file-size cap.

There's exactly one thing to watch: JPG has no transparency. Wherever the original was transparent, something has to be filled in — and plenty of tools quietly fill it black, which is why people end up asking why their image turned dark. Here you choose the colour, and the default is white.

Key features

Transparency fills white by default, not black

Proper linear blending by alpha, so semi-transparent edges stay smooth instead of gaining a hard fringe. White, black or light grey — the result updates as you pick.

Adjustable quality, size shown as you go

92% is the default: hard to tell from the original by eye. Drag it down for a much smaller file — the download button always shows the resulting size.

Nothing uploaded, no limit on how many

Conversion finishes inside your browser; not one byte of the image goes out. Drop a dozen at once and it switches to batch mode with before/after on every thumbnail.

No sign-up, no watermark

Open it and use it. Nothing is stamped onto the result.

How to use

1
Drop your PNG in

Drag, click to pick, or paste with Ctrl+V. Several at once turns into batch mode automatically.
2
Pick what fills the transparency

White by default. If your image has no transparency, this setting makes no difference.
3
Set quality, watch the size

Drag the slider; the result updates live and the download button shows the final size.
4
Download

Save as .jpg, or carry it into the pro editor in one click.

FAQ

Where did my transparent background go?: It was filled with the colour you chose (white by default). That isn't our design decision — the JPG format simply has no alpha channel: each pixel stores only RGB, with nowhere to keep transparency. If you need it preserved, don't convert to JPG; stay on PNG or use WebP.
Does it lose quality?: Yes — JPG is lossy. At the default 92% most photos look indistinguishable by eye; below about 60% blocking becomes visible, especially across flat colour and around text. If the source is a screenshot, line art or anything with text, converting to JPG is usually the wrong move — PNG is both smaller and cleaner for that kind of content.
Can I convert a lot at once? Is there a cap?: Yes, and there's no cap. Dropping several switches to batch mode, where each thumbnail is itself original-vs-result, and changing the quality recomputes all of them. Speed depends on your machine, not on a limit we set — we don't set one.
Are my images uploaded to a server?: No. Decoding, conversion and encoding all happen in your browser. You can verify it: open the network panel in developer tools and convert — no request carrying image data appears.

Try PNG to JPG: transparent areas become white, not black now

Runs fully in your browser · no install · no signup · images never uploaded