How to Use the Phone Number Format Normalizer
Phone numbers copied from spreadsheets, business cards, or web forms often come in inconsistent formats — (555) 123-4567, 555-123-4567, or just 5551234567. This tool lets you paste multiple numbers at once, strips out non-digit characters, and reformats every line into the style you choose: parentheses, hyphens, dots, digits-only, or international format with a country code. Lines that don't match a standard 10-digit US number are flagged as "Not recognized" so you can fix them manually.
Useful for
- Cleaning up customer contact lists from spreadsheets
- Standardizing numbers scraped from business cards or documents
- Converting to international format (+1) for overseas use
- Stripping formatting for database or form imports
Frequently Asked Questions
Yes, choose "International" to strip the leading 1 and add +1 automatically.
Yes, standard 10-digit US numbers are split into a 3-digit area code, 3-digit prefix, and 4-digit line number.
If the digit count isn't exactly 10 (or 11 with a leading 1), that line is marked "Not recognized" while other lines still convert normally.