JPEGsnoop icon
JPEGsnoop icon

JPEGsnoop

 8 likes

JPEGsnoop is a detailed JPEG image decoder and analysis tool. It reports all image metadata and can even help identify if an image has been edited.

JPEGsnoop screenshot 1

License model

  • FreeOpen Source

Platforms

  • Windows
Discontinued

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 Tags

  • forensics
  • jpeg
  • exif
  • decoding
  • image-authentication

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JPEGsnoop information

  • Developed by

    Unknown
  • Licensing

    Open Source and Free product.
  • Alternatives

    5 alternatives listed
  • Supported Languages

    • English

Our users have written 0 comments and reviews about JPEGsnoop, and it has gotten 8 likes

JPEGsnoop was added to AlternativeTo by Sharif on Mar 24, 2014 and this page was last updated Jun 28, 2023.
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What is JPEGsnoop?

Every digital photo contains a wealth of hidden information -- JPEGsnoop was written to expose these details to those who are curious.

Not only can one determine the various settings that were used in the digital camera in taking the photo (EXIF metadata, IPTC), but one can also extract information that indicates the quality and nature of the JPEG image compression used by the camera in saving the file. Each digical cameras specifies a compression quality levels, many of them wildly different, leading to the fact that some cameras produce far better JPEG images than others.

What can I do? Check out a few of the many possible uses for JPEGsnoop!

One of the latest features in JPEGsnoop is an internal database that compares an image against a large number of compression signatures. JPEGsnoop reports what digital camera or software was likely used to generate the image. This is extremely useful in determining whether or not a photo has been edited / tampered in any way. If the compression signature matches Photoshop, then you can be pretty sure that the photo is no longer an original! This type of analysis is sometimes referred to as Digital Image Ballistics / Forensics.

JPEGsnoop reports a huge amount of information, including: quantization table matrix (chrominance and luminance), chroma subsampling, estimates JPEG Quality setting, JPEG resolution settings, Huffman tables, EXIF metadata, Makernotes, RGB histograms, etc. Most of the JPEG JFIF markers are reported. In addition, you can enable a full huffman VLC decode, which will help those who are learning about JPEG compression and those who are writing a JPEG decoder.

Other potential uses: determine quality setting used in Photoshop Save As or Save for Web settings, increasing your scanner quality, locating recoverable images / videos, decoding AVI files, examining .THM files, JPEG EXIF thumbnails, extract embedded images in Adobe PDF documents, etc.

Official Links