HandyTools Hub

Phone Number Formatter

Parse, validate, and format international phone numbers

Use + prefix for international format (e.g., +86 138 0013 8000)

This phone number formatter takes a raw number — typed, pasted, or copied from a spreadsheet — and returns it in clean national, international, and E.164 formats, with a validity check. It covers 15 countries — handy for SMS API developers, sales teams cleaning contact lists, and anyone needing a standard-format number.

What is E.164 and Why Does It Matter?

E.164 is the ITU standard for international phone numbers: a plus sign, a country code of one to three digits, then the national number, fifteen digits at most — like +14155552671. It matters because machines read most numbers today: SMS gateways, VoIP systems, and CRMs expect E.164 and reject or misroute anything else. A US number stored as (415) 555-2671 looks fine to a human but breaks an API call. And every country displays numbers differently — the French group digits in pairs, Germans use variable-length area codes — so converting between human-friendly and machine-friendly formats saves real debugging time.

How to Use

  1. Type or paste a phone number into the input field.
  2. Numbers starting with + are detected automatically; otherwise pick a country from the dropdown.
  3. Read the three formatted versions: national, E.164, and international.
  4. Check the validation result and fix flagged issues like stray letters or wrong length.

Features

  • Auto-detection of country from + prefix
  • National, E.164, and international display formats
  • Formatting rules for 15 countries
  • Validation with specific issue reporting
  • Instant results, fully client-side

Use Cases

Developers normalize user input before sending it to an SMS provider like Twilio. Analysts clean phone columns in CRM exports so duplicates match. Support agents reformat numbers for international callbacks, and travelers turn a business-card number into a dialable format.

Frequently Asked Questions

What is E.164 format?

E.164 is an international standard for phone number formatting. It consists of a + sign, a country code (1-3 digits), and a national number (up to 15 digits total). E.164 is required by most SMS APIs and telephony services.

Which countries are supported?

15 countries: US, Canada, China, UK, Japan, South Korea, India, Germany, France, Australia, Brazil, Italy, Spain, Mexico, and Russia. Each country has specific formatting rules reflecting the local standard for displaying phone numbers.

How do I format international phone numbers?

Enter the number with the + prefix and country code (e.g., +44 20 7946 0958). The tool auto-detects the country and displays in national, E.164, and international formats. For national numbers without a country code, select the country from the dropdown.