Free Bluesky Hashtag Generator

Custom feeds change what tags are for

Bluesky lets anyone build a feed, and people subscribe to those feeds the way they would follow an account. Many feeds are constructed around topics and pull in posts carrying particular hashtags, which gives tagging a concrete mechanical role: a tag can place your post into a feed with a standing subscriber base. This is different from both the algorithmic model, where tags are one weak signal, and the Mastodon model, where tags are the whole discovery system. On Bluesky, tags are an input into infrastructure other users have built.

How to tag on Bluesky

Aim at the feeds rather than at an imagined browsing audience.

• Use tags that active feeds actually aggregate, which means checking what exists rather than inventing something descriptive.
• Keep to two or three. Posts are capped at 300 graphemes and every tag is spending part of that budget.
• Be specific, since topic feeds tend to be narrow and a generic tag may not be aggregated by anything.
• Watch the grapheme count rather than the character count, because Bluesky measures perceived characters and emoji behave differently.
• Place tags at the end so they do not interrupt the post, which matters more when you only have 300 graphemes.
• Reconsider periodically, since the feed landscape on Bluesky changes as people build and abandon feeds.

How discovery works here

Bluesky sits between the algorithmic and the fediverse models, which is unusual.

• The default feed is chronological from people you follow, so nothing is pushed to strangers automatically there.
• Custom feeds are the discovery layer, and users choose which ones to subscribe to rather than having a feed chosen for them.
• Anyone can build a feed, including you, which means the discovery infrastructure is genuinely open.
• Some feeds aggregate by hashtag, some by keyword, some by author list, so tagging helps with a subset of them.
• Because feeds are opt in, the audience reached through one is usually smaller but considerably more interested.

Who uses this tool

People trying to be found on a platform without a push algorithm.

• People rebuilding an audience after leaving X who find their posts reaching only existing followers.
• Writers and journalists posting on specific subjects with dedicated feeds.
• Developers and technical users, who are well represented and who often maintain feeds themselves.
• Anyone whose posts perform well among followers but never reach beyond them.
• People new to the custom feed concept and unsure how to get included in one.

Bluesky tag reference

The constraints and how tags interact with feeds.

Bluesky is developing quickly and the set of active custom feeds changes, so tags that reach a feed today may not tomorrow. Checked September 2026.

When this is not the right tool

There is no way for the tool to know which feeds are live or well subscribed, and that picture changes as people create and abandon them. Checking on the platform is the only reliable way to know what a tag will reach. Bluesky is also a smaller network, so even correct tagging produces smaller numbers than the platforms it is compared with, and reading that as failure would be a mistake. For the posts themselves the Bluesky post generator works within the 300 grapheme limit, and the character counter measures graphemes correctly.