EXIF extraction with exiftool.
NOTE: use https://github.com/LearnBoost/node-libexif if compiling is not a problem, it uses native bindings and is much faster.
$ npm install exif2
var exif = require('exif');
exif(file, function(err, obj){
console.log(obj);
}){
"exiftool version number": "9.08",
"file name": "forest.jpeg",
"directory": "test/fixtures",
"file size": "497 kB",
"file modification date time": "2012:12:11 14:45:59-08:00",
"file access date time": "2012:12:13 16:18:36-08:00",
"file inode change date time": "2012:12:11 14:45:59-08:00",
"file permissions": "rw-------",
"file type": "JPEG",
"mime type": "image/jpeg",
"jfif version": "1.01",
"exif byte order": "Big-endian (Motorola, MM)",
"photometric interpretation": "Color Filter Array",
"make": "NIKON CORPORATION",
"camera model name": "NIKON D7000",
"orientation": "Horizontal (normal)",
"x resolution": "72",
"y resolution": "72",
"resolution unit": "inches",
"software": "Pixelmator 2.1.1",
"modify date": "2012:10:08 19:10:63.50",
"exposure time": "1/80",
"f number": "5.6",
"exposure program": "Aperture-priority AE",
"iso": "500",
"date time original": "2012:10:07 11:36:30.50",
"create date": "2012:10:07 11:36:30.50",
"exposure compensation": "-2",
"max aperture value": "4.0",
"metering mode": "Multi-segment",
"light source": "Unknown",
"flash": "Off, Did not fire",
"focal length": "10.0 mm (35 mm equivalent: 15.0 mm)",
"sub sec time": "50",
"sub sec time original": "50",
"sub sec time digitized": "50",
"color space": "sRGB",
"exif image width": "1971",
"exif image height": "1306",
"sensing method": "One-chip color area",
"custom rendered": "Normal",
"exposure mode": "Auto",
"white balance": "Auto",
"digital zoom ratio": "1",
"focal length in 35mm format": "15 mm",
"scene capture type": "Standard",
"gain control": "Low gain up",
"contrast": "Normal",
"saturation": "Normal",
"sharpness": "Normal",
"subject distance range": "Unknown",
"profile cmm type": "Lino",
"profile version": "2.1.0",
"profile class": "Display Device Profile",
"color space data": "RGB",
"profile connection space": "XYZ",
"profile date time": "1998:02:09 06:49:00",
"profile file signature": "acsp",
"primary platform": "Microsoft Corporation",
"cmm flags": "Not Embedded, Independent",
"device manufacturer": "IEC",
"device model": "sRGB",
"device attributes": "Reflective, Glossy, Positive, Color",
"rendering intent": "Perceptual",
"connection space illuminant": "0.9642 1 0.82491",
"profile creator": "HP",
"profile id": "0",
"profile copyright": "Copyright (c) 1998 Hewlett-Packard Company",
"profile description": "sRGB IEC61966-2.1",
"media white point": "0.95045 1 1.08905",
"media black point": "0 0 0",
"red matrix column": "0.43607 0.22249 0.01392",
"green matrix column": "0.38515 0.71687 0.09708",
"blue matrix column": "0.14307 0.06061 0.7141",
"device mfg desc": "IEC http://www.iec.ch",
"device model desc": "IEC 61966-2.1 Default RGB colour space - sRGB",
"viewing cond desc": "Reference Viewing Condition in IEC61966-2.1",
"viewing cond illuminant": "19.6445 20.3718 16.8089",
"viewing cond surround": "3.92889 4.07439 3.36179",
"viewing cond illuminant type": "D50",
"luminance": "76.03647 80 87.12462",
"measurement observer": "CIE 1931",
"measurement backing": "0 0 0",
"measurement geometry": "Unknown (0)",
"measurement flare": "0.999%",
"measurement illuminant": "D65",
"technology": "Cathode Ray Tube Display",
"red tone reproduction curve": "(Binary data 2060 bytes, use -b option to extract)",
"green tone reproduction curve": "(Binary data 2060 bytes, use -b option to extract)",
"blue tone reproduction curve": "(Binary data 2060 bytes, use -b option to extract)",
"xmp toolkit": "XMP Core 4.4.0",
"serial number": "5044750",
"lens": "Sigma 10-20mm F4-5.6 EX DC HSM",
"image number": "6069",
"flash compensation": "0",
"image width": "900",
"image height": "596",
"encoding process": "Baseline DCT, Huffman coding",
"bits per sample": "8",
"color components": "3",
"y cb cr sub sampling": "YCbCr4:4:4 (1 1)",
"aperture": "5.6",
"image size": "900x596",
"scale factor to 35 mm equivalent": "1.5",
"shutter speed": "1/80",
"circle of confusion": "0.020 mm",
"field of view": "100.4 deg",
"hyperfocal distance": "0.89 m",
"lens id": "Unknown (809257734)",
"light value": "9.0"
}MIT