Subreddit wiki
Also called: reddit wiki, community wiki, r/subreddit/wiki
Definition
A subreddit wiki is a set of reference pages moderators create inside a community, at reddit.com/r/name/wiki. Wikis hold extended rules, FAQs, guides and resource lists, and often spell out self-promotion rules in more detail than the sidebar.
Every subreddit can have a wiki: a set of pages moderators maintain for things that do not fit in a rules list. Reddit Help describes wikis as letting moderators "create structured, persistent reference pages within their communities."
What wikis are used for
Reddit's help page lists common uses:
- Information about the community
- Guides and resources for the topic
- Lists of important threads, or "halls of fame" of top posts
- Directories of related communities, when the list is too long for the sidebar
- Extended rules or participation guides, often used with sticky posts, AutoModerator comments and welcome threads
- Documentation of moderation policies
- Private guides for moderators
- FAQ pages
You usually find the wiki through a link in the sidebar (Reddit lists wiki pages among the sidebar's bookmark links), in pinned posts, or by adding /wiki to the subreddit URL.
The 2025 wiki rebuild
Reddit rebuilt its wiki system, adding in-line editing, templates, embedded media and public version history. As of August 12, 2025, new communities and communities creating a wiki for the first time use the new system. Reddit notes that after a wiki migrates, edits made on old Reddit no longer sync to it; AutoModerator configuration pages are excluded and keep syncing.
Why it matters for marketers
The wiki is where the real rules often are. A sidebar might say "No self-promotion"; the wiki page explains the exceptions: a weekly thread, a minimum account age, a required disclosure format, a ratio of community participation to promotional posts. Many removals that feel arbitrary are explained in a wiki page the poster never opened.
Wikis are also research:
- FAQ pages show the questions a community gets tired of answering. Those are often the problems your product solves.
- Resource lists show which tools the community already recommends. Some communities accept suggestions for those lists through modmail, on the merits.
- Rules for vendors, where they exist, tell you exactly how a business can participate.
For more on the broader norms, see Reddit self-promotion rules.
Example
A founder sees "No promotion" in a SaaS subreddit's sidebar and almost gives up. The wiki's "Promotion policy" page says founders may share their product in the weekly feedback thread if they have a history of participating in the community, and must disclose they are the founder. That is a clear, workable path.
Common mistakes
- Never opening the wiki. It is usually one click away.
- Reading an outdated wiki on old Reddit after the community migrated to the new system.
- Asking questions the FAQ already answers. Mods and regulars notice.
Frequently asked questions
How do I find a subreddit's wiki?
Look for a wiki link in the sidebar or pinned posts, or go to reddit.com/r/subredditname/wiki.
Can anyone edit a subreddit wiki?
It depends on the community's settings. Moderators control who can edit, and many restrict editing to mods or approved contributors.
Why does the wiki look different on old Reddit?
Since August 2025, communities can move to Reddit's new wiki system, and edits made on old Reddit do not sync to migrated wikis.