JPG to HEIC
Turn JPEG image files into HEIC photo (iPhone) files on your own Mac, Windows or Linux computer. Asteria is free, works offline, and never uploads your files.
How to do it
- Download Asteria and open it. It's free and needs no account.
- Drop your JPG files onto its window, or press ⌘O (Ctrl O on Windows) to choose them. Drop as many as you like.
- Type jpg to heicand pick Convert to HEIC. About half the size of JPEG.
- Press ⌘↵ (Ctrl ↵ on Windows) to save. The HEIC files appear next to the originals, which stay exactly as they were.
Quality: 70 = high quality, 50 = smaller file. Add it after the name, like heic 70.
What it needs
Nothing. This conversion is built into Asteria, so it works the moment the app is open, even offline.
How it was tested
A real JPG file was converted on macOS on Apple silicon and Linux, and the HEIC that came out was opened and checked with ffprobe to make sure it is what it says it is.
Download Asteria
Free for Mac, Windows and Linux. Other systems and first-launch help