ExifTool Quick Reference
========================

BASIC USAGE
  exiftool file                  Show all metadata
  exiftool -s file               Short tag names
  exiftool -G file               Show group names
  exiftool -json file            JSON output
  exiftool -a -u file            All tags, including unknown

SPECIFIC TAGS
  exiftool -ImageWidth file      Single tag
  exiftool -GPSLatitude file     GPS location
  exiftool -Comment file         Comments
  exiftool -Author file          Author
  exiftool -CreateDate file      Creation date

WRITE METADATA
  exiftool -Comment="text" file  Set comment
  exiftool -Author="name" file   Set author
  exiftool -all= file            Remove ALL metadata
  exiftool -overwrite_original file   Don't create backup

BATCH OPERATIONS
  exiftool *.jpg                 All JPEGs
  exiftool -r directory/         Recursive
  exiftool -ext jpg directory/   Only .jpg files

COMPARE
  exiftool -a -u file1 file2     Compare metadata

COMMON CTF PATTERNS
  # Check for hidden data in comments
  exiftool -Comment image.jpg
  exiftool -UserComment image.jpg

  # Check GPS coordinates (physical location clue)
  exiftool -GPSPosition image.jpg

  # Check for steganography hints
  exiftool -all image.png | grep -i "comment\|software\|description"

  # Thumbnail extraction
  exiftool -b -ThumbnailImage image.jpg > thumb.jpg

  # Check if image was edited
  exiftool -Software -ModifyDate image.jpg

  # Hidden data in XMP
  exiftool -xmp:all image.png
