Extraction
Match a hashtag
Flags: g
Extract hashtags (#topic) from social media style text.
Pattern
Regular expression
#\w+How it works
Matches `#` followed by one or more word characters. Simple and effective for latin-alphabet hashtags.
Matches
- ▸#coding
- ▸#WebDev
- ▸#100DaysOfCode
Non-matches
- ▸# space (space breaks it)
- ▸just text
Common gotchas
For non-Latin hashtags (Chinese, Arabic, emoji), use the Unicode-aware pattern: `#[\p{L}\p{N}_]+` with the `u` flag in JS.
Language snippets
JavaScript
const re = /#\w+/g;
"#dev #webdev".match(re); // ["#dev", "#webdev"]Python
re.findall(r"#\w+", "#dev #webdev")Go
re := regexp.MustCompile(`#\w+`)
re.FindAllString("#dev #webdev", -1)Java
Pattern.compile("#\\w+")Frequently asked questions
What is the regex for hashtag?
The pattern #\w+ (flags: g) matches hashtag. Matches `#` followed by one or more word characters. Simple and effective for latin-alphabet hashtags.
What does this hashtag pattern match?
It matches strings like #coding, #WebDev, #100DaysOfCode, but rejects # space (space breaks it), just text.
How do I use this pattern in JavaScript, Python, Go, Java?
Ready-to-run snippets are provided for JavaScript, Python, Go, Java. Copy the one for your language from the Language snippets section — each wraps the same core pattern in that language's regex API.
What are common pitfalls with a hashtag regex?
For non-Latin hashtags (Chinese, Arabic, emoji), use the Unicode-aware pattern: `#[\p{L}\p{N}_]+` with the `u` flag in JS.