• Signal 1: GPS and location metadata
  • Signal 2: EXIF device identity
  • Signal 3: The DQT encoder fingerprint
  • Signal 4: The MakerNote block
  • Signal 5: Edit detection
  • Signal 6: What sharing platforms actually strip
  • How the signals combine
  • Run a JPEG through snapWONDERS
  • Why this matters
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Tag: image compression

Dark navy hero image showing a JPEG file icon surrounded by six forensic signal indicators with a simplified report panel on the right
Blog / Digital Forensics · 4 July 2026

A Complete Guide to JPEG Forensic Analysis

Every JPEG carries six forensic signals beyond what you see in a photo viewer. This guide covers all of them and explains what they reveal in combination.

Recent Posts

  • A Complete Guide to JPEG Forensic Analysis
  • How to Forensically Detect AI-Generated Images — No Detection Model Required
  • Can you get metadata from a photo someone sent you?
  • The EXIF thumbnail that gave the edit away
  • MakerNote forensics: what camera manufacturers hide inside every photo

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