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In-memory processing
JPG to PNG runs as JavaScript inside this tab.
Never uploaded
Safe for financials, contracts and NDAs.
No caps or sign-ups
File size is limited only by device memory.
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Convert JPG to PNG when an app or editor requires PNG, or when you plan to edit an image repeatedly and do not want it to lose more detail with each save.
Also known as JPEG to PNG.
No. PNG is lossless, so it preserves the image exactly as it is now, but it cannot restore detail that JPG compression already removed. Expect the PNG to be larger than the JPG.
Yes. JPG to PNG runs entirely inside your web browser using JavaScript, so the file never leaves your device. It is safe for confidential documents such as contracts, financial records and IDs.
There is no fixed limit, because the file is processed on your own device. Very large files depend on your device's available memory; a modern laptop or phone handles hundreds of megabytes.
Yes. ZapConvert runs in any modern browser, including Safari on iPhone and iPad and Chrome on Android, with nothing to install. You can add several files at once and download them together as a ZIP.