Scry

A pure Swift EXIF metadata parser. No dependencies, no Apple frameworks. Fully macOS and Linux compatible.

Supports JPEG, PNG, and WebP images.

Scry does not load the entire image into memory, and as such can be used with large image files.

Usage

import Scry

if let metadata = try? Scry.metadata(fromFileAt: "/path/to/photo.jpg") {
  print(metadata["Make"])    // "Apple"
  print(metadata["Model"])   // "iPhone 14 Pro"
  print(metadata["FNumber"]) // 1.78
}

Returns nil when the image has no EXIF data.

Installation

Add to your Package.swift:

dependencies: [
  .package(url: "https://github.com/loopwerk/Scry.git", from: "1.0.0"),
]

Metadata properties

Scry.metadata(fromFileAt:) returns a flat [String: Any] dictionary. The keys and value types are:

Image info (from TIFF IFD0)

Key	Type	Example
ImageWidth	Int	4032
ImageLength	Int	3024
ImageDescription	String	"Sunset photo"
Make	String	"Apple"
Model	String	"iPhone 14 Pro"
Orientation	Int	1
XResolution	Double	72.0
YResolution	Double	72.0
ResolutionUnit	Int	2
Software	String	"18.7.3"
DateTime	String	"2026:01:05 17:11:42"
Artist	String	"Kevin Renskers"
HostComputer	String	"iPhone 14 Pro"
Copyright	String	"2026 Kevin Renskers"

Exposure and camera (from EXIF sub-IFD)

Key	Type	Example
ExposureTime	Double	0.04 (seconds)
FNumber	Double	1.78
ExposureProgram	Int	2
ISOSpeedRatings	Int	800
ExifVersion	[UInt8]	[2, 3, 2]
DateTimeOriginal	String	"2026:01:05 17:11:42"
DateTimeDigitized	String	"2026:01:05 17:11:42"
ShutterSpeedValue	Double	4.64 (APEX)
ApertureValue	Double	1.66 (APEX)
BrightnessValue	Double	-2.50 (APEX)
ExposureBiasValue	Double	0.0 (EV)
MeteringMode	Int	5
Flash	Int	16
FocalLength	Double	6.86 (mm)
OffsetTime	String	"+01:00"
OffsetTimeOriginal	String	"+01:00"
OffsetTimeDigitized	String	"+01:00"
PixelXDimension	Int	4032
PixelYDimension	Int	3024
CustomRendered	Int	0
ExposureMode	Int	0
WhiteBalance	Int	0
FocalLenIn35mmFilm	Int	24
SceneCaptureType	Int	0
BodySerialNumber	String	"DNXXXXXXXXXXXX"
LensSpecification	[Double]	[2.22, 9.0, 1.78, 2.8]
LensMake	String	"Apple"
LensModel	String	"iPhone 14 Pro back triple camera 6.86mm f/1.78"
LensSerialNumber	String	"XXXXXXXXXX"

GPS (from GPS sub-IFD)

Key	Type	Example
GPSVersionID	[Int]	[2, 3, 0, 0]
GPSLatitudeRef	String	"N"
GPSLatitude	[Double]	[52.0, 31.0, 12.74] (deg, min, sec)
GPSLongitudeRef	String	"E"
GPSLongitude	[Double]	[13.0, 24.0, 36.33] (deg, min, sec)
GPSAltitudeRef	Int	0 (0 = above sea level)
GPSAltitude	Double	38.39 (meters)
GPSTimeStamp	[Double]	[16.0, 11.0, 42.0] (hrs, min, sec)
GPSSpeedRef	String	"K" (km/h)
GPSSpeed	Double	0.0
GPSImgDirectionRef	String	"T" (true north)
GPSImgDirection	Double	139.56 (degrees)
GPSDestBearingRef	String	"T"
GPSDestBearing	Double	139.56 (degrees)
GPSDateStamp	String	"2026:01:05"

Only keys present in the image are included in the dictionary. Not every image will have every property.