Standardize US phone numbers with multiple format options and validation

by Sunny Thaper · 521 views · created 2025-05-01 · Engineering

What this workflow does

This workflow has 7 nodes and runs when another workflow calls it. It uses only n8n's built-in nodes.

How it runs

Trigger: When another workflow calls it.

1. Strip phone number formatting (Edit Fields (Set)): sets 1 field: Phone Number
2. Check number of digits in phone number (Switch): routes items into 4 branches
3. Check if first digit is valid country code (If): checks a condition and branches into true / false
4. Add valid country code (Edit Fields (Set)): sets 1 field: Phone Number
5. Clear invalid number (Edit Fields (Set)): sets 1 field: Phone Number
6. Format phone numbers (Edit Fields (Set)): sets 7 fields: Phone Number (Input), Phone Number, Phone Number (National)…

Before you upgrade to n8n 3.0

Nodes used (4)

• Execute Workflow Triggern8n-nodes-base.executeWorkflowTrigger
• Ifn8n-nodes-base.if
• Edit Fields (Set)n8n-nodes-base.set
• Switchn8n-nodes-base.switch

From the author

Workflow Overview: This n8n workflow template takes a US phone number as input, validates it, and returns it in multiple standard formats, including handling extensions. It's designed to streamline the process of standardizing phone number data within your…

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