Syntax

REPLACEB(text, position, num_bytes, new_text)

Arguments

The printed syntax lists 4 argument(s), in order:

  • text
  • position
  • num_bytes
  • new_text

“optional” marks an argument Google prints in square brackets; “repeatable” marks one Google prints with “…”.

Description from Google Docs Editors Help

“Replaces part of a text string, based on a number of bytes, with a different text string.”

Google’s help article for REPLACEB →

Source: Google Docs Editors Help, “Google Sheets function list” (support.google.com/docs/table/25273), record record 444 of 516, data fetched 28 September 2026. Data month: September 2026.