EXIF (Exchangeable Image File Format) is a standard for metadata embedded in image files (primarily JPEG, TIFF, and HEIC). EXIF data stores information captured by the camera: exposure settings (aperture, shutter speed, ISO), lens focal length, camera model, date and time taken, and if GPS is enabled, the exact location where the photo was taken.
EXIF data is stored in a separate section of the image file and doesn't affect the visual content. However, it does add to file size (typically a few KB). More importantly, EXIF data can be a significant privacy concern: photos shared online with GPS coordinates embedded reveal your home address, workplace, travel patterns, and daily routine to anyone who inspects the file's metadata.
Most social media platforms automatically strip EXIF data on upload — Facebook, Instagram, and Twitter remove GPS coordinates. However, when sharing photos directly (via email, WhatsApp, iCloud) EXIF data is preserved. To remove EXIF data before sharing sensitive photos, use image compression tools (FileCurve's compressor strips metadata during compression) or dedicated EXIF removal tools.