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Free Reddit tools
7 tools for the questions people ask before they post on Reddit: which communities, how big, what the rules say, how to actually search it, and whether a draft reads as human. Each one does its job on its own page; none of them needs an account.
Find communities
Which subreddits are worth your time.
Subreddit Finder
needs a descriptionDescribe what you sell and who buys it; get the communities where that conversation already happens, ranked by fit rather than by size.
OpenSimilar Subreddits
needs a subreddit nameStart from one subreddit you know and find the ones its members also post in — measured from shared authors, not from name similarity.
OpenTop Subreddits
needs nothingThe largest, most active and fastest-growing communities in the catalog, ranked from a crawl that runs daily. Filter by metric.
OpenCheck a community
Size, activity, growth and the posted rules — before you post.
Search Reddit properly
The operators Reddit hides, and where to run them.
Write for Reddit
Sound like a person, not a model.
AI Writing Checker
needs textPaste a draft and see what gives it away as model-written: em dashes per 1,000 words, model vocabulary, flat sentence rhythm. Nothing leaves your browser.
OpenComment Humanizer
needs textRewrites a draft in a real Reddit or X voice and strips the tells. Free for the first few runs a day, then sign in.
OpenWhy these are free
They answer one-off questions, and one-off questions do not need a subscription. The catalog the finder and stats tools read from is the same one Prowlo maintains for paying customers, so keeping these pages current costs nothing extra; the search builder and writing checker run entirely in your browser. What Prowlo charges for is the recurring half — watching communities every hour, keeping the records, and serving them to your AI agent over MCP — which is a different job from looking something up once.