Exploring Hidden JPEG Features

A deep dive into a lesser-known capability of the JPEG format: its progressive loading mechanism can be exploited to embed multiple images in a single file. By leveraging the low-resolution and high-resolution passes of progressive JPEG encoding, a developer demonstrates loading two distinct images sequentially — effectively creating a rudimentary one-way animation. The technique is limited to roughly nine frames and has no timing control, but it highlights surprising hidden flexibility in the decades-old standard that still dominates the web.

Source: https://hackaday.com/2026/07/24/exploring-hidden-jpeg-features. 8sync News only summarizes and links out; content copyright belongs to the authors and original sources.