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Phone Number Formatter

Format, validate, and convert phone numbers with country detection, as-you-type style grouping, extensions, and bulk tools. Export to CSV/JSON.

Output Format
Separator

Result

Status Invalid / uncommon length
E.164
International
National
RFC3966
• No digits found

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Phone Number Formatter Guide

This comprehensive tool formats, validates, and converts phone numbers between international standards with intelligent country detection and formatting rules. It supports 195+ countries and handles various input formats, extensions, and output requirements.

Core Features

📞 Input Modes

Single Number Processing

Process one phone number at a time with real-time formatting and validation.

Bulk Processing

Process multiple phone numbers simultaneously with advanced filtering and export options.

Country Support

The tool includes comprehensive data for 195+ countries with:

  • Accurate calling codes (e.g., +1 for US/CA, +44 for UK, +91 for India)
  • National number lengths validation
  • Country-specific formatting patterns
  • Trunk prefixes (e.g., 0 for many European countries)
  • Example numbers for reference

Examples:

  • United States: +1 415 555 2671 (calling code: 1, 10 digits)
  • United Kingdom: +44 20 7946 0958 (calling code: 44, 10-11 digits)
  • India: +91 98765 43210 (calling code: 91, 10 digits)
  • Germany: +49 30 1234 5678 (calling code: 49, trunk: 0)
  • Japan: +81 3 1234 5678 (calling code: 81, trunk: 0)

Auto-Detection

Automatic country detection from international calling codes:

  • Recognizes +1, +44, +91, +49, +33, etc.
  • Falls back to selected country if no +code present
  • Handles ambiguous codes (e.g., +1 for US/Canada)

Examples:

Input: +1 415 555 2671 → Detects: United States
Input: +44 20 7946 0958 → Detects: United Kingdom
Input: +91 98765 43210 → Detects: India
Input: 030 1234567 → Uses selected country (Germany)

Output Formats

E.164 Format

Standard international format with +country code + national number (no separators).

Examples:
+14155552671 (US)
+442079460958 (UK)
+919876543210 (India)
+493012345678 (Germany)

International Format

Human-readable international format with country code and formatted national number.

Examples:
+1 415 555 2671 (US)
+44 20 7946 0958 (UK)
+91 98765 43210 (India)
+49 30 1234 5678 (Germany)
+81 3 1234 5678 (Japan)

National Format

Local format as used within the country (may include trunk prefix).

Examples:
(415) 555-2671 (US, with parentheses)
020 7946 0958 (UK, with trunk)
098765 43210 (India)
030 1234 5678 (Germany, with trunk)
03-1234-5678 (Japan, with trunk)

RFC3966 Format

Standard format for telephone URIs (tel: scheme).

Examples:
tel:+14155552671
tel:+442079460958
tel:+919876543210;ext=123
tel:+493012345678

🔧 Customization Options

Separators

Choose how digits are grouped: Space, Dash (-), Dot (.), or None.

Examples with +1 415 555 2671:

  • Space: +1 415 555 2671
  • Dash: +1 415-555-2671
  • Dot: +1 415.555.2671
  • None: +14155552671

Parentheses (US/Canada)

Wrap the first digit group in parentheses for North American numbers.

Without parentheses: +1 415 555 2671
With parentheses: +1 (415) 555 2671

Extensions

Detect and include phone extensions in various formats.

Supported extension formats:

  • x123, ext 123, extension 123
  • ;ext=123

Examples:

Input: +1 415 555 2671 x123
Output: +1 415 555 2671 x123 (International)
Output: tel:+14155552671;ext=123 (RFC3966)

Input: 020 7946 0958 ;ext=456
Output: +44 20 7946 0958 x456 (International)

Trunk Prefixes

Include or exclude trunk prefixes in national format.

Examples:

  • Germany (+49): 030 1234 5678 (with trunk) vs 30 1234 5678 (without)
  • UK (+44): 020 7946 0958 (with trunk) vs 20 7946 0958 (without)
  • Japan (+81): 03-1234-5678 (with trunk) vs 3-1234-5678 (without)

Bulk Processing

Input Methods

Paste multiple numbers separated by:

  • Newlines (default)
  • Commas
  • Semicolons
  • Tabs
  • Auto-detect (tries all separators)

Example bulk input:

+1 212 555 0123
+91 98765 43210
(020) 7946 0958
049 123 4567
+55 11 91234-5678

Filtering Options

  • Keep only valid: Remove numbers that don't match country length rules
  • Remove duplicates: Eliminate identical numbers based on E.164 format

Statistics

Real-time stats show:

  • Total numbers processed
  • Valid vs invalid counts
  • Unique number count

Export Options

  • Copy results: Copy all formatted numbers to clipboard
  • Export CSV: Download detailed table with all formats
  • Export JSON: Download structured data for programmatic use

CSV Export includes: Index, Original, E.164, Formatted, International, National, RFC3966, Country, Valid status

Validation

The tool validates numbers based on:

  • Country-specific length rules (e.g., US: 10 digits, UK: 10-11 digits)
  • Calling code recognition
  • Format plausibility

Validation examples:

  • +1 415 555 2671 (US, 10 digits - Valid)
  • +1 415 555 267 (US, 9 digits - Invalid)
  • +44 20 7946 0958 (UK, 10 digits - Valid)
  • +44 121 496 0000 (UK, 10 digits - Valid)
  • +44 20 7946 095 (UK, 9 digits - Invalid)

Data Persistence

All settings are automatically saved to browser localStorage:

  • Selected country
  • Auto-detection preference
  • Format preferences
  • Separator choices
  • Extension and trunk settings
  • Current input values

Settings persist across browser sessions.

Copy & Export Features

Single Mode

  • Copy formatted result to clipboard
  • Individual format fields (E.164, International, etc.)

Bulk Mode

  • Copy all results as newline-separated text
  • Export complete dataset as CSV
  • Export structured data as JSON

Advanced Examples

Complex International Numbers

Input: +33 1 23 45 67 89
Country: France (+33)
E.164: +33123456789
International: +33 1 23 45 67 89
National: 01 23 45 67 89 (with trunk)

Input: +61 2 9876 5432
Country: Australia (+61)
E.164: +61298765432
International: +61 2 9876 5432
National: (02) 9876 5432

Numbers with Extensions

Input: +1 (800) 123-4567 ext 789
Country: United States
E.164: +18001234567
International: +1 800 123 4567 x789
RFC3966: tel:+18001234567;ext=789

Input: 020 7946 0958 ;ext=123
Country: United Kingdom
International: +44 20 7946 0958 x123
RFC3966: tel:+442079460958;ext=123

Bulk Processing Example

Input:

+1 415 555 2671
+44 20 7946 0958
+91 98765 43210
invalid number
+1 415 555 2671 (duplicate)

With "Keep only valid" and "Remove duplicates" enabled:

Total: 5 | Valid: 3 | Invalid: 1 | Unique: 3
Results: +1 415 555 2671 (United States) +44 20 7946 0958 (United Kingdom)

Usage Tips

Best Practices

  • For international databases: Use E.164 format (+countrycode + national number)
  • For user display: Use International format (+country code + formatted national)
  • For local contact lists: Use National format (local conventions)
  • For web links: Use RFC3966 format (tel:+... scheme)
  • Enable auto-detection when processing mixed international numbers
  • Use bulk mode for processing contact lists or databases

Troubleshooting

  • Number not recognized? Check if the country is selected correctly
  • Wrong format? Verify the output format selection (E.164 vs International vs National)
  • Extension not appearing? Ensure "Include extension" is checked
  • Invalid numbers? Some countries have variable lengths (UK: 10-11 digits)

Technical Notes

  • All formatting is done client-side in the browser
  • No data is sent to external servers
  • Settings are stored locally in browser storage
  • Works offline once loaded
  • Compatible with all modern browsers

For mission-critical phone number validation, consider using official libraries like Google's libphonenumber on the server side.