How to identify image metadata with ImageMagick
Image metadata can explain why an upload was rejected, why a design handoff has the wrong dimensions, or whether a file still carries comments and format-specific properties before it is shared. ImageMagick can inspect those details from the terminal without opening the image in an editor.
ImageMagick 7 uses the magick identify command to report image format, canvas size, colorspace, depth, compression, and other file characteristics. Adding -verbose expands the report to include channel statistics, properties, format-specific fields, and the pixel signature.
Metadata availability depends on the image format and the data embedded in the file. A JPEG from a camera may expose EXIF fields, while an exported or optimized image may only show basic format properties, comments, dimensions, and compression details.
Steps to identify image metadata with ImageMagick:
- Identify the image format and dimensions.
$ magick identify photo.jpg photo.jpg JPEG 1200x800 1200x800+0+0 8-bit sRGB 43471B 0.000u 0:00.000
Replace photo.jpg with the image file being checked. Some systems still provide an ImageMagick 6 compatibility command named identify, but the ImageMagick 7 form is magick identify.
- Print the detailed metadata and properties report.
$ magick identify -verbose photo.jpg Image: Filename: photo.jpg Format: JPEG (Joint Photographic Experts Group JFIF format) Mime type: image/jpeg Geometry: 1200x800+0+0 Colorspace: sRGB Depth: 8-bit ##### snipped ##### Compression: JPEG Quality: 92 Orientation: Undefined Properties: comment: Catalog handoff sample jpeg:colorspace: 2 jpeg:sampling-factor: 1x1,1x1,1x1 signature: 02f005e619ed99dd84731574b244b3e72c3d9ab55e9046c88914dfb99cce08ec Filesize: 43471B Number pixels: 960000 ##### snipped #####The Properties section is where embedded comments and format-specific properties appear. The signature line is a hash of the pixel data, not an author, camera, or location field.
- Print only the fields needed for a handoff or script.
$ magick identify -format "format=%m\ngeometry=%wx%h\ncolorspace=%[colorspace]\ndepth=%z-bit\ncomment=%c\n" photo.jpg format=JPEG geometry=1200x800 colorspace=sRGB depth=8-bit comment=Catalog handoff sample
-format limits the output to selected fields, which keeps tickets, asset manifests, and batch logs from carrying the full verbose report.
- Check for exposed EXIF fields when the image should contain camera metadata.
$ magick identify -format "%[EXIF:*]" photo.jpg
No output means ImageMagick did not expose an EXIF property block for that file. Check the original image before assuming the camera, date, or location metadata was never present.
- Verify the field that matters before using or sharing the file.
$ magick identify -format "comment=%c\n" photo.jpg comment=Catalog handoff sample
Use the narrowest field check for the decision being made, such as dimensions before a layout handoff, colorspace before print preparation, or comment and EXIF fields before publishing.