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Characters That Are Not Allowed

Published: Oct 19, 2026 | Updated: Oct 19, 2026 | About (Japanese)

Key points
  • Enter the name
  • Check the characters
  • Replace them

Sheet Name Checker finds \ / ? * [ ] : and replaces them with _.

Steps

  1. Enter the name
  2. Check the characters
  3. Replace them
When using a date as a sheet name, changing / to - is safe.
Use "Check an Excel Sheet Name" (free)

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