Each parameter on a GA4 hit has a maximum value of 100 characters. Pull data from existing Universal Analytics to identify Custom Dimension values that are longer than 100 characters:

• Identify dimensions that may need special handling based on character length
• See hit volumes where values exceed 100 characters
• See top collected values that exceed 100 characters
• Change the character minimum to see values that exceed 100 characters, 200 characters, 300 characters, etc
• Quickly determine how many split parameter will be required to recreate these values in GA4

Please to view data collected in your custom dimensions that exceeds 100 characters.