Every iPhone since iOS 11 saves photos as HEIC by default. It's a genuinely better format — same visual quality as JPEG at roughly half the file size, thanks to being built on HEVC compression instead of the decades-old JPEG codec. The problem is compatibility: plenty of websites, Windows apps,...

Source: [Dev.to](https://dev.to/rushikes-dev/how-i-added-browser-based-heic-to-jpg-conversion-no-server-no-upload-28kf)

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