What is a HEIC file?
HEIC is the photo format iPhones and iPads use by default. It keeps photos small without losing quality, but Windows, many websites, online forms and older apps can't open it. JPG works everywhere, so converting is the quickest fix.
Batch conversion
Add a whole folder of photos at once. Each one is converted on this device, and you can download them one by one or together as a ZIP. Photos taken in Live Photo or burst mode convert their main image.
JPG or PNG
Choose JPG for photos you want to share, email or upload: the files are small and open everywhere. Choose PNG when you need an exact copy with no compression, for example to edit further.
Privacy
Your photos never leave this device. They are decoded and converted inside your browser, and the location and camera details stored in the original are left out of the converted files.
Questions
Can I stop my iPhone saving HEIC?
Yes. On the iPhone go to Settings, Camera, Formats and choose Most Compatible. New photos are then saved as JPG.
Does it work on Mac and iPhone too?
Yes. It works in any modern browser on Windows, Mac, Android and iPhone.