Replace — Power Fx function reference

Syntax

Replace( Text, StartPosition, NumberOfCharacters, NewText )

Examples

Replace("2026", 1, 2, "19")

Replace(txtAccount.Text, 1, 4, "****")

Replace("2026-06-13", 6, 2, "12")

Common mistakes & gotchas

• Replace works by character position, not by matching text — use Substitute instead when replacing based on a known substring rather than a fixed position.
• If NumberOfCharacters extends past the end of the string, Replace just replaces through the end rather than erroring.

Related Power Fx functions

From Text

Used in these tutorials