← Lab

LAB / 07 · Live tool

UTM Builder & Validator

Build campaign URLs, detect naming and encoding problems, and preview how their values will appear in GA4.

Open tool
UTM campaign URL builder
07 / UTILITIES

01 / CONTEXT

The problem

Campaign attribution degrades when teams improvise capitalization, spaces and naming conventions. This builder validates the inputs while keeping the final link visible and easy to copy.

02 / CAPABILITIES

What it does

  1. 01

    Create properly encoded campaign URLs.

  2. 02

    Detect existing UTM parameters and remove them from the base URL.

  3. 03

    Flag spaces, uppercase letters and special characters.

  4. 04

    Preview how source, medium and campaign will appear in GA4.

03 / SYSTEM

Privacy & architecture

A responsive vanilla HTML, CSS and JavaScript tool with no backend or stored data.

Built with

  • HTML
  • CSS
  • JavaScript
  • GA4

04 / HONEST NOTES

Known limits

  • Warnings do not automatically enforce an organization's naming taxonomy.
  • Only missing or invalid required inputs block URL generation.