Pick tags that describe the post. A tag that does not fit brings the wrong readers.
You can paste a finished post into the hashtag finder to count its tags.
Glossary
Hashtag: what it means
A hashtag is a word or phrase after a hash sign that turns into a link to other posts using it. Networks use them to group topics for search. Letters, numbers and underscores work; spaces and punctuation end the tag. How many help depends on the network, so test rather than assume.
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Free tools
Count characters the way each network does, split threads and preview posts. No account needed.
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API and MCP
Post to every network from your own code or assistant with one key, signed webhooks and idempotent requests.
See the APIQuestions
Do hashtags work the same everywhere?
No. Some networks lean on them for discovery and others barely show them. Treat each network separately.
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