How to Convert Image Format on iPhone/iPad
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Tap the
actions button on the bottom toolbar. -
Tap Convert > Convert Image Format.

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Select the desired options.
Supported formats: JPEG, HEIC, PNG, WebP, and JPEG XL.

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Tap the Confirm button.
The converted image will be saved in the selected format, and the original image will be deleted. If you want to keep the original image as well, turn on the Keep Original option.