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probe-image-size

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Get image size without full download. Supported image types: JPG, GIF, PNG, WebP, BMP, TIFF, SVG, PSD, ICO, AVIF, HEIC, HEIF.

Key features:

Install

npm install probe-image-size

Example

const probe = require('probe-image-size');

// Get by URL
let result = await probe('http://example.com/image.jpg');
console.log(result); // =>
/*
  {
    width: xx,
    height: yy,
    type: 'jpg',
    mime: 'image/jpeg',
    wUnits: 'px',
    hUnits: 'px',
    url: 'http://example.com/image.jpg'
  }
*/


// By URL with options
let result = await probe('http://example.com/image.jpg', { rejectUnauthorized: false });
console.log(result);


// From the stream
let result = await probe(require('fs').createReadStream('image.jpg'));
console.log(result);


// From a Buffer (sync)
let data = require('fs').readFileSync('image.jpg');
console.log(probe.sync(data));

API

Note:

probe(src [, options|keepOpen]) -> Promise

result (Promise) contains:

{
  width: XX,
  height: YY,
  length: ZZ,   // byte length of the file (if available, HTTP only)
  type: ...,    // image 'type' (usual file name extention)
  mime: ...,    // mime type
  wUnits: 'px', // width units type ('px' by default, can be different for SVG)
  hUnits: 'px', // height units type ('px' by default, can be different for SVG)
  url: ...,     // HTTP only, last url for the image in chain of redirects
                // (if no redirects, same as src)

  // optional, image orientation (from Exif), number from 1 to 8;
  // you may wish to swap width and height if orientation is >= 5
  orientation: X,

  // optional, full list of sizes for ICO (always) and AVIF (if multiple images)
  variants: [ { width, height }, ... ] | undefined
}

Width and height in the output object represent image size before any transformations (orientation, cropping) are applied. Orientation is returned separately, which you may wish to apply afterwards depending on browser support (browsers only support JPEG orientation for now). See known issues for details.

Returned errors can be extended with 2 fields:

probe.sync(src) -> result|null

Sync version can eat arrays, typed arrays and buffers. On success it returns the same result as async version. On fail it returns null.

Note. Formats like JPEG & TIFF can store size anywhere (far from the head). That usually does not happens, but if you need guarantees - always provide full file content to sync methods. We strongly recommend to use async version as memory-friendly.

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