NSFW.
Not safe for work: a warning that material contains adult, explicit or otherwise inappropriate content for a workplace or public setting.
What does NSFW mean?
NSFW is a warning about where content may be unsuitable to open. It expands to not safe for work. The problem might be sexual material, strong profanity or another kind of inappropriate content; the letters alone do not tell you exactly what is inside.
It describes the material or the context of viewing it, not a person’s job status. A creator marking a link NSFW is flagging a possible problem before you open it. Treat the label as a warning rather than as a precise, universal rating.
See how it lands.
Original examples written for this entry, not quotations from the sources.
That link is NSFW; open it somewhere private.
Please put an NSFW warning before the attachment.
The right word.
The right moment.
Use the label before a link or attachment when its content calls for a warning, and describe the issue more specifically when practical.
Do not assume that every warning means pornography, or that an unlabelled link has been checked and is suitable for every audience.
Not quite the same as…
NSFL
NSFL is a stronger warning associated with disturbing or graphic material. NSFW covers a broader question of suitability for public or professional viewing.
A little backstory.
The linked reference documents this meaning. This entry does not establish a single inventor or a first-use date; a dictionary record and a current popularity measurement answer different questions.
Supported by Wiktionary contributors
Still wondering?
What does NSFW stand for?
Not safe for work. The wording is about suitability for the setting in which somebody opens the material, rather than a statement about employment.
Does NSFW always mean sexual content?
No. Adult material is one possibility, but profanity and other inappropriate material can also receive the label. Look for a more specific warning.
Sources & checks
Meaning and factual notes are informed by the references below. Examples and usage advice are original editorial writing. A source documents use; it does not measure current popularity.
- NSFW — meaning and usage ↗Wiktionary contributors · checked 20 Oct 2026Supports: meaning; distinct senses