Read EXIF metadata from a JPEG

Read common TIFF and Exif camera tags from a Base64-encoded JPEG APP1 segment.

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ToolEXIF Reader
Input
Output
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How it works

The decoded JPEG is scanned for an APP1 marker beginning with Exif and two zero bytes. Its embedded TIFF header declares little- or big-endian byte order and IFD offsets; supported ASCII, integer, and rational fields are read only after bounds checks.

  • Only common TIFF and Exif IFD tags are shown; IPTC, XMP, maker notes, thumbnails, and GPS arrays are separate structures and are not claimed as parsed.

Worked example

Read a camera make from a minimal JPEG
Decode an APP1 Exif block containing one TIFF Make tag
Input
											/9j/4QAnRXhpZgAASUkqAAgAAAABAA8BAgAFAAAAGgAAAAAAAABBY21lAP/Z
Output
												{
  "tags": {
    "Make": "Acme"
  },
  "tagCount": 1
}

When to use this

Photo intake checks camera make and model, privacy reviews inspect capture metadata, and imaging tests verify exposure and pixel-dimension tags.

Edge cases

  • A valid JPEG without an Exif APP1 segment reports that no EXIF block exists.
  • An IFD offset beyond the decoded byte array is rejected as truncated or malformed data.
  • XMP or IPTC in another JPEG marker is not returned as EXIF metadata.

References