Extract hashtag

Collect hash-prefixed ASCII tags whose first character is a letter and whose remainder contains letters, digits, or underscores.

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ToolHashtag Extractor

Input

Output

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How it works

A global regular expression scans left to right for # plus an ASCII letter and continues through ASCII alphanumerics or underscore. Exact duplicates are removed initially, while lowercasing and removal of the leading hash remain optional.

Unique output with the # retained is the default because it preserves a paste-ready tag list.
This grammar is intentionally narrower than the evolving Unicode rules of individual social platforms.

Worked example

Extract hashtags from a post

Pull out hashtags from social media text

Input

											Just launched our new feature! #ProductUpdate #WebDev #Launch2024

Output

												Hashtags: #ProductUpdate, #WebDev, #Launch2024
Tags: ProductUpdate, WebDev, Launch2024
Count: 3
Unique: #ProductUpdate, #WebDev, #Launch2024

When to use this

Social exports yield tag lists, campaign reports deduplicate branded labels, and moderation fixtures extract ASCII hash tokens from chat transcripts.

Edge cases

#2026 is skipped because the first code point after # is a digit rather than an ASCII letter.
#café stops at #caf, and a tag written only in Arabic or Japanese does not match.
#Launch and #launch stay distinct until lowercase conversion is selected.