Converting doesn't bring back detail the JPG already lost, but nothing more is lost from here on.

Is my image uploaded?

No. It's processed in your browser and never leaves your device.

What does Advanced add?

Every option at once, many files in one go, and a single zip download.

Save a JPG as PNG, for apps and sites that ask for PNG or before editing it further.

Drop images hereor paste with ⌘V. Nothing is uploaded.

JPGPNGWebPHEICGIFAVIF

Good to know: Converting doesn't bring back detail the JPG already lost, but nothing more is lost from here on.
Is my image uploaded?: No. It's processed in your browser and never leaves your device.
What does Advanced add?: Every option at once, many files in one go, and a single zip download.