NSFW
Also called: not safe for work, 18+, mature content, nsfw tag
Definition
NSFW stands for Not Safe For Work, a required Reddit label for content or communities that may be explicit or inappropriate in public settings. NSFW content is hidden unless users opt in, and is excluded from awards, promoted posts and AI search.
NSFW means "Not Safe For Work." Reddit Help describes it as a warning that content "may be inappropriate or explicit for certain environments, such as workplaces or public spaces," which can include explicit images, adult discussions or other sensitive material. The opposite is SFW, "safe for work."
How NSFW works on Reddit
- Labeling is required. Reddit's moderator help says "All Not Safe For Work (NSFW) content on Reddit is required to be marked as such." Rule 6 of the Reddit Rules asks users to label content and communities properly, particularly graphic, sexually explicit or offensive content.
- Posts and communities. Authors and moderators can mark individual posts NSFW. Whole communities can be NSFW too.
- Viewing is opt-in. To see mature content, you turn on Show mature (18+) content in your settings on reddit.com, with an option to blur it until clicked. On iOS, these settings are managed from the desktop site to comply with Apple's guidelines. In some countries, Reddit may ask for your birthdate.
What NSFW excludes
Across Reddit's help pages, NSFW content or communities are excluded from:
- [Awards](/glossary/reddit-awards/): content tagged NSFW, and content in NSFW communities, cannot receive awards.
- [Promoted posts](/glossary/promoted-post/): NSFW posts are not eligible to be promoted.
- Reddit's AI search ([Reddit Answers](/glossary/reddit-answers/)): it excludes content from NSFW communities.
- [Reddit Pro](/glossary/reddit-pro/): signing up requires a safe-for-work account.
Why it matters for marketers
For most brands, the practical points are:
- Keep your account SFW. Reddit Pro requires it, and a business account flagged NSFW looks wrong to customers.
- Do not mislabel content. Marking something NSFW to get clicks ("NSFW: our prices are insane") breaks Rule 6's labeling principle and many communities' rules.
- Check community status before engaging. Comments in NSFW communities will not appear in AI search summaries, cannot be awarded and are outside the reach of most brand-safety settings.
- Brands in adult or adjacent categories (some supplements, alcohol, sexual wellness) need to read each community's rules carefully. Reddit Help notes that awards also exclude certain mature themes such as alcohol and gambling.
Example
A sexual wellness brand wants to answer product questions on Reddit. Its useful threads are split between SFW health communities and NSFW communities. It participates in the SFW ones from a SFW business account, following their medical-advice rules, and avoids posting from that account into NSFW spaces where its content would be hidden from most users and excluded from search features anyway.
Frequently asked questions
What does NSFW mean on Reddit?
Not Safe For Work: content that may be explicit or inappropriate in public settings.
How do I turn on NSFW content on Reddit?
On reddit.com, go to Settings, then Preferences, and turn on Show mature (18+) content. On iOS, change it on the desktop site, then restart the app.
Why was my post marked NSFW?
A moderator may have marked it, or the community itself is NSFW. All NSFW content must be labeled, and mods often apply the tag when users forget.