iPhone photos taken with the High Efficiency (HEIC) or JPEG camera setting often take up 3MB to 8MB each. When sending photos via email, messaging apps, or upload forms, reducing their file size saves cellular data and prevents upload errors.
Fastest Method: Use Safari & TinyImgAI
You don't need to install expensive App Store apps. Open Safari on your iPhone, navigate to TinyImgAI, select your photo from the iOS Photo Library, and compress it locally right in your browser!