Regex Cookbook

Starter expressions for common marketing automation and analytics tasks. Test patterns with the Regex Tester before deployment.

URL Filtering

• Match UTM parameters: utm_[a-z]+=([^&]+)
• Exclude query strings: ^[^?]+
• Capture URL slug: (?:https?://[^/]+)?/([^/?#]+)

Log File Parsing

• Extract status codes: "\s(\d{3})\s
• Find redirect chains: \s30[12]\s
• Capture response time: time=(\d+\.\d+)

Content QA

• Detect double spaces: \s{2,}
• Find passive voice verbs: \b(is|was|were|be|been|being)\s+\w+ed\b
• Identify placeholder text: \b(lorem ipsum|tbd|placeholder)\b

Email Campaigns

• Capture merge tags: {{[^}]+}}
• Find subject line emojis: [\x{1F300}-\x{1F6FF}]
• Validate unsubscribe links: https?://[^\s]+unsubscribe

Document custom patterns below for team reuse.