ExifTool HtmlDump Option 
Below is an example of the ExifTool HtmlDump output (the exiftool
"-htmlDump " option).  Move your cursor over the data to highlight
individual blocks and reveal tool tips for extra information. (You must have
JavaScript enabled.)
The command used to generate the output below was:
exiftool -htmldump t/images/FujiFilm.jpg > out.htmlIn this output, normal
data blocks are light  or dark green ,
unused blocks are brown , and double-referenced blocks are
red  or pink . A
blue  tag name indicates the value is referenced by an
offset in the IFD (ie. the value is longer than 4 bytes),
purple  indicates that the actual offset differs from the
recorded offset, and a red  name indicates an invalid
offset.  Odd offsets are flagged with "(odd) " and
out-of-sequence tag ID's are indicated by "(seq) " because
the TIFF specification states that values must begin on a (2-byte) word boundary
and that IFD entries must be in order of increasing tag ID. All data in the
maker notes value block is underlined . 
Clicking the mouse locks current the highlighted entry, and clicking again
unlocks it.
Currently, only TIFF/EXIF and JPEG meta information is dumped.  The leftmost
column of the output gives the offset in hex relative to the start of the TIFF
header (by default).  For a TIFF image this is at the start of the file, but for
a JPEG image it is 10 bytes after the start of the APP1 EXIF segment.  However,
this base offset can be specified on the command line with "-htmlDump#" (eg.
"-htmlDump0" for absolute offsets), or via the API with the "HtmlDumpBase"
option.
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JPEG header 
APP1 header 
Exif header 
TIFF header 
IFD0 entries 
IFD0-00 Make  
IFD0-01 Model  
IFD0-02 Orientation 
IFD0-03 XResolution  
IFD0-04 YResolution  
IFD0-05 ResolutionUnit 
IFD0-06 Software  
IFD0-07 ModifyDate  
IFD0-08 YCbCrPositioning 
IFD0-09 Copyright  
IFD0-10 ExifOffset 
Next IFD 
ExifIFD entries 
ExifIFD-00 FNumber  
ExifIFD-01 ExposureProgram 
ExifIFD-02 ISO 
ExifIFD-03 ExifVersion 
ExifIFD-04 DateTimeOriginal  
ExifIFD-05 CreateDate  
ExifIFD-06 ComponentsConfiguration 
ExifIFD-07 CompressedBitsPerPixel  
ExifIFD-08 ShutterSpeedValue  
ExifIFD-09 ApertureValue  
ExifIFD-10 BrightnessValue  
ExifIFD-11 ExposureCompensation  
ExifIFD-12 MaxApertureValue  
ExifIFD-13 MeteringMode 
ExifIFD-14 Flash 
ExifIFD-15 FocalLength  
ExifIFD-16 MakerNotes  
ExifIFD-17 FlashpixVersion 
ExifIFD-18 ColorSpace 
ExifIFD-19 ExifImageWidth 
ExifIFD-20 ExifImageHeight 
ExifIFD-21 InteropOffset 
ExifIFD-22 FocalPlaneXResolution  
ExifIFD-23 FocalPlaneYResolution  
ExifIFD-24 FocalPlaneResolutionUnit 
ExifIFD-25 SensingMethod 
ExifIFD-26 FileSource 
ExifIFD-27 SceneType 
Next IFD 
MakerNotes header 
MakerNoteFujiFilm entries 
MakerNotes-00 Version 
MakerNotes-01 Quality  
MakerNotes-02 Sharpness 
MakerNotes-03 WhiteBalance 
MakerNotes-04 FujiFlashMode 
MakerNotes-05 FlashExposureComp  
MakerNotes-06 Macro 
MakerNotes-07 FocusMode 
MakerNotes-08 SlowSync 
MakerNotes-09 PictureMode 
MakerNotes-10 AutoBracketing 
MakerNotes-11 Tag 0x1200 
MakerNotes-12 BlurWarning 
MakerNotes-13 FocusWarning 
MakerNotes-14 ExposureWarning 
Next IFD 
InteropIFD entries 
InteropIFD-00 InteropIndex 
InteropIFD-01 InteropVersion 
Next IFD 
IFD1 entries 
IFD1-00 Compression 
IFD1-01 Orientation 
IFD1-02 XResolution  
IFD1-03 YResolution  
IFD1-04 ResolutionUnit 
IFD1-05 ThumbnailOffset 
IFD1-06 ThumbnailLength 
IFD1-07 YCbCrPositioning 
Next IFD 
(IFD1:Thumbnail data)
[JPEG DQT]
[JPEG SOF0]
[JPEG DHT]
[JPEG Image Data]
JPEG EOI