Digital Horror is a broad genre of horror that is disseminated through online mediums and uses the aesthetics and technology of the early-to-mid digital era (roughly the late 1990s to the early/mid 2010s) to create feelings of dread, nostalgia, and unease. The genre is defined by its medium and its thematic content rather than a single, cohesive visual style.

Unlike its predecessor, Analog Horror , which focuses on the decay and limitations of physical media like VHS tapes, Digital Horror draws its scares from the corruption of familiar digital experiences. This includes haunted video games, cursed websites, sentient AI, and disturbing web animations. The horror often comes from taking a nostalgic and seemingly innocent piece of early internet culture (like a Flash game, an old YouTube video, a pop culture character, or a personal website) and twisting it into something sinister and unsettling.

The roots of Digital Horror can be traced back to the early 2000s with the rise of creepypastas and viral shock content. Early works like the Ben Drowned ARG (2010), which told its story through faked Legend of Zelda: Majora's Mask gameplay footage, and web animations like David Firth's Salad Fingers (2004), established many of the genre's core tenets: the corruption of beloved media, a surreal and unsettling tone, and distribution through online platforms.

The genre evolved throughout the 2010s, with complex and influential web series like Petscop (2017) pushing the boundaries of interactive, game-based horror storytelling. By the 2020s, Digital Horror had become a well-established genre on YouTube, with series like The June Archive and Restoration Project and Lacey Games refining the formula, often using the aesthetic of forgotten Flash games and early 2000s websites to explore themes of existential dread and the darker side of nostalgia.

While Digital Horror does not have a single, uniform style, its visual identity is defined by the intentional replication of the aesthetics, artifacts, and limitations of early internet culture from the late 1990s to the early/mid 2010s. The genre deliberately employs a low-quality or "lo-fi" presentation to evoke a sense of authenticity and nostalgia. This includes the use of low-resolution video, pixelated graphics, and the distinct visual markers of outdated software, such as the watermarks from screen recording programs like Bandicam, the simple title cards of Windows Movie Maker, and the use of default system fonts like Comic Sans.

These visual elements support the genre's central narrative tropes, which prey on the audience's familiarity with early digital life. A key characteristic is the corruption of nostalgia, where a seemingly innocent piece of media, like a Flash game or an old website, is revealed to be sinister or haunted. This horror is often expressed through the theme of haunted technology, in which sentient AI, corrupted data, or "glitch entities" cause digital worlds to behave in impossible ways, subverting the viewer's nostalgic memories to create a sense of dread.

While Digital Horror and Analog Horror are closely related subgenres of found footage horror, they are distinguished by the specific technological eras they evoke. Analog Horror is defined by the aesthetics of pre-digital, physical media from the 1960s to the 1990s or, extant the mid-2000s. Its horror is rooted in the decay of tapes, TV broadcast hijacking, and the limitations of analog technology. In contrast, Digital Horror focuses on the era of the early internet years, from the late 1990s to the early or mid-2010s. Its horror comes from software glitches, haunted files or videos, and the uncanny nature of early digital worlds.