How can I get the size or dimensions of an image by its public ID?

Via API

• Upload response includes dimensions
• Query assets via Admin API
• Return image metadata in a GET request

Via UI

• Media Library's asset preview tab
• Drill down into the manage page

Via API

Upload response includes dimensions

When uploading using our API, every upload call automatically returns a JSON response with the file's details including the  bytes, width and height parameters. Here is an image upload example:

{
 public_id: 'sample',
 version: '1312461204',
 width: 864,
 height: 564,
 format: 'jpg',
 created_at: '2017-08-10T09:55:32Z',
 resource_type: 'image',
 tags: [], 
 bytes: 9597, 
 type: 'upload', 
 etag: 'd1ac0ee70a9a36b14887aca7f7211737', 
 url: 'http://res.cloudinary.com/demo/image/upload/v1312461204/sample.jpg',
 secure_url: 'https://res.cloudinary.com/demo/image/upload/v1312461204/sample.jpg',
 signature: 'abcdefgc024acceb1c1baa8dca46717137fa5ae0c3',
 original_filename: 'sample'
}

Similarly, a video upload response has the following:

{
  "public_id": "ygzxwxmflekucvqcrb8c",
  "version": 1427018743,
  "signature": "4618ba7c3461b6531cb9d2f16b06ce672af793b6",
  "width": 854,
  "height": 480,
  "format": "mp4",
  "resource_type": "video",
  "created_at": "2017-03-22T10:05:43Z",
  "tags": [  ],
  "bytes": 9094354,
  "type": "upload",
  "etag": "7e3977ca45a2c2a063e4f29fa3ecdfdd",
  "url": "http://res.cloudinary.com/demo/video/upload/v1427018743/ygzxwxmflekucvqcrb8c.mp4",
  "secure_url": "https://res.cloudinary.com/demo/video/upload/v1427018743/ygzxwxmflekucvqcrb8c.mp4",
  "audio": {
    "codec": "aac",
    "bit_rate": "246679",
    "frequency": 48000,
    "channels": 2,
    "channel_layout": "stereo"
  },
  "video": {
    "pix_format": "yuv420p",
    "codec": "h264",
    "level": 31,
    "bit_rate": "5170819"
  },
  "frame_rate": 29.97002997002997,
  "bit_rate": 5424041,
  "duration": 13.4134
}

Query assets via Admin API

You can also use our Admin API to list the details of an already uploaded image. For example in Ruby:

Cloudinary::Api.resource('sample')

Note that Admin API calls (only) are rate-limited.

For more information:
http://cloudinary.com/documentation/admin_api#details_of_a_single_resource

Return image metadata in a GET request

Returns metadata of both the input asset and the transformed output asset in a JSON format by using the flag parameter and setting it to getinfo (fl_getinfo in URLs).

https://res.cloudinary.com/demo/image/upload/ar_0.7,c_fill,g_auto:subject,w_750/fl_getinfo/boat_lake2.jpg
// Returns
{"input":{"width":1920,"height":1280,"bytes":1213497},"landmarks":[[]],"g_auto_info":[{"x":25,"y":0,"width":893,"height":1279}],"resize":[{"x":23,"y":0,"width":896,"height":1280},{"x_factor":0.8370535714285714,"y_factor":0.8370535714285714}],"output":{"format":"jpg","bytes":308948,"width":750,"height":1071}}

More information can be found here.

Via UI

Media Library's asset preview tab

1. Go to the Media Library and search for the asset
2. Single-click on the asset and select the previous icon (eye) in the upper-right hand corner of the Media Library and right underneath the console navbar.
   

Drill down into the manage page

1. Go to the Media Library and search for the asset
2. Double-click on the asset and it will move you to the manage page