Identifiersflags: g

Slack User Mention

Match Slack user mentions in their raw form <@U01234ABC> as delivered by the Events API.

Try it in RegexPro →

Available in

JavaScript / ECMAScript

Browser-native RegExp. Default if you don't pick.

Python (re)

CPython stdlib `re`. Unicode-aware `\w` and `\d` by default.

Go (RE2)

Linear-time matching. No backreferences or lookarounds.

Pattern

regexengine-agnostic

<@U[A-Z0-9]{8,}>   (flags: g)

Raw source: <@U[A-Z0-9]{8,}>

How it works

Literal <@U prefix, then 8 or more uppercase alphanumeric characters (Slack's ID alphabet), closed by >. Matches user IDs regardless of legacy or modern length.

Examples

Input

cc <@U01234ABC> please review

Matches

<@U01234ABC>

Input

pinged <@UABCDEF123GH> earlier

Matches

<@UABCDEF123GH>

Input

no mentions

No match

—

Common use cases

•Slack bot payload parsing
•Notification auditing
•@mention frequency analytics
•Channel migration tooling

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