Short answer
Use one or two hashtags that people actually search or follow for an event or topic; on X, posts with many hashtags tend to look spammy, and the algorithm understands topics without them.
Key takeaways
- One or two relevant hashtags; more rarely helps.
- Hashtags matter most for live events, chats and campaigns.
- Hashtags must contain a letter; '#2026' alone doesn't link.
The hashtag was invented on Twitter in 2007. It still works on X, but it isn't the growth lever it once was. Use it where it helps people find a conversation.
When do hashtags help?
When people follow or search the tag: live events, scheduled chats, conferences, campaigns and tight-knit topics.
A conference tag (#DevConf26) collects posts from attendees. A weekly chat tag gathers participants. A campaign tag tracks a launch. In ordinary posts, X's systems already understand the topic from the words, so tags add clutter more than reach.
How many should I use?
One or two; posts packed with tags read as spam.
Put them where they read naturally, often at the end. A tag in the middle of a sentence ("Our #coffee is roasted Mondays") is fine if it doesn't break the sentence.
How does X decide what counts as a hashtag?
A # followed by letters, numbers or underscores, containing at least one letter, and not attached to the word before it.
| Typed | Becomes a link? |
|---|---|
| #TrailRunning | Yes |
| #2026 | No (no letter) |
| #NYC2026 | Yes |
| C#programming | No (attached to the C) |
| #café / #قهوة | Yes (accented and non-Latin letters work) |
| #small-business | Only "#small" |
Our generator and character counter use the same rules, so mockups highlight exactly what X would.
How do I find good hashtags?
Search a candidate tag and read the recent posts: if they're real people talking about your topic, it's a good tag.
See how to find trending hashtags for tools and Explore tips. Advertisers can also buy branded hashtags, which add a small custom emoji to a tag; see types of X ads.
Should I use hashtags in my bio?
One or two that describe a community you belong to are fine; avoid lists of popular tags.
Bio hashtags link to search results, which can send visitors away from your profile. Use them when the tag is a community people know you through, like a profession or event series.
Questions people ask
Do hashtags still work on X?
Yes for events, chats, campaigns and niche communities that follow a tag. For everyday posts, X's ranking reads the text itself, so hashtags add little.
Can a hashtag contain spaces or punctuation?
No. A hashtag ends at the first space or punctuation mark. Use capital letters to make multi-word tags readable: #SmallBusinessSaturday.
Can I create my own hashtag?
Yes, just use it. Check search first to make sure it isn't already used for something else.