NSFL (Not Safe For Life)

NSFL is an internet warning label meaning "not safe for life." It marks content so graphic or disturbing, typically extreme gore, severe injury or death, that it goes beyond merely being inappropriate for the workplace (NSFW) and risks being genuinely traumatic to view. The tag is a courtesy signal asking readers to make a deliberate choice before clicking.

On Reddit the distinction between NSFW and NSFL matters for both culture and policy. NSFW is a built-in flag that gates adult or explicit material; NSFL is largely a user-applied convention layered on top, used in titles and warnings for content that may technically be allowed but is deeply upsetting. The label intersects with the platform's content rules, since some extremely violent or harmful material is prohibited outright, while other graphic content sits in a contested zone governed by community standards and the duty to warn. NSFL therefore illustrates how community norms and official policy together manage exposure to harmful imagery.