EXIF (Exchangeable Image File Format) data embedded by cameras and phones: make/model, lens and exposure settings, GPS coordinates, capture timestamp with time zone, and sometimes a software-edit history. AiEraser detects and strips all of it via in-browser canvas re-encoding — nothing is uploaded.
The most concrete risk is GPS: a photo shared online with embedded coordinates can reveal exactly where you live, work, or were standing — even if nothing in the image itself is identifiable. Camera serial numbers (recorded by some EXIF implementations) can, in rare cases, link a set of supposedly anonymous photos back to one specific device.
In JPEG, EXIF sits in an APP1 marker segment, identified by the "Exif\0\0" signature right after the segment header. In PNG, it can appear as a dedicated eXIf chunk (less common, added to the PNG spec more recently) or get carried inside an XMP packet instead. WebP stores it in a RIFF chunk labeled EXIF. AiEraser's scanner reads all three.
Only pixel data. Canvas re-encoding keeps the image exactly as it looks, and drops the EXIF block (and everything else) by construction — there's no way for stray fields to survive the process.
Use AiEraser's View mode to see exactly what EXIF fields are in your file — including GPS, if present — before deciding to clean it, or go straight to Remove mode.