Hashtag Generator Online
Search public Mastodon hashtag data, compare seven-day activity and build a ready-to-copy tag set.
Method and limitations reviewed August 8, 2026. Browser-first, no login required.
Topic matches for “fitness”
Select or remove tags before copying.
Selected hashtags
0
Live topic matches
0
Observed uses (7d)
0
0 hashtags selected
Trending on Mastodon
Tags with increased activity during the past week.
Live hashtag names and seven-day activity come from the public API at mastodon.social. If direct access fails, Toolsaly relays the same public request. Counts describe that Mastodon server only; they are not Instagram, YouTube or global popularity estimates.
Your topic is sent to mastodon.social to search its public hashtag index; Toolsaly may relay that request if direct access fails. Custom keywords and selected output stay in your browser.
About this tool
What this tool does
The hashtag generator uses a real public social index instead of presenting a fixed list as current popularity. It keeps the source and scope visible so recent server activity is not mistaken for global platform data.
How the result is produced
- Topic searches use the mastodon.social public v2 search endpoint with the result type restricted to hashtags.
- If the browser cannot reach the public API directly, a cached Toolsaly endpoint relays the same restricted request.
- Seven-day use and account totals are summed from the daily history returned with each hashtag.
- The trending section uses the server's public trending-tags endpoint and can be refreshed independently.
- Selected live tags and custom keywords are normalized, de-duplicated and limited to 30 before copying.
Good uses
- Discovering public Mastodon hashtags related to a topic
- Comparing recent activity among closely related tags
- Building a clean draft set that combines observed and custom tags
How to verify the result
- Open promising tags on the social platform where the post will actually be published.
- Check that every selected tag is relevant to the specific post, not only popular.
- Review platform rules and recent posts before publishing a large tag set.
Known limitations
- Counts cover activity reported by mastodon.social, not every Mastodon server or the whole internet.
- The data does not represent Instagram, YouTube, TikTok or global hashtag popularity.
- Public trends change quickly, and custom keywords do not receive measured activity unless returned by the live search.