E.164 Phone Number Formatter
Convert messy phone numbers to E.164 format (+1234567890). Country code selector, batch mode, and reference table.
Last reviewed: April 2026New to this tool? Click here for instructions
E.164 country calling codes - click any row to copy the code.
| Country | Code | Example Number | Digits |
|---|
How to Use the Phone Number Formatter
To use the E.164 Phone Number Formatter, follow these steps:
1. Select your country from the dropdown menu to add the appropriate country code.
2. Enter the phone number you want to format. The tool supports various formats such as (555) 123-4567, 555-123-4567, 555.123.4567, or +1 (555) 123-4567.
3. Click the 'Format' button to convert the phone number to E.164 format.
4. The result will be displayed in E.164 format, e.g., +15551234567.
- Select country code
- Enter phone number
- Click 'Format'
- View E.164 output
When to Use the Tool in Real Workflows
Use the E.164 Phone Number Formatter in the following scenarios:
1. When building applications that require international phone number support, such as SMS messaging or phone calls.
2. When storing user contact information in a database to ensure consistency and compatibility with telephony APIs.
3. When preparing phone numbers for transmission to telephony services that require E.164 format.
4. When normalizing phone numbers for batch processing or bulk uploads.
How It Works
The E.164 Phone Number Formatter uses a simple, deterministic algorithm to convert phone numbers to E.164 format:
1. It detects whether the input starts with a + sign. If so, it preserves the + and strips all non-digit characters from the remainder.
2. If the input starts with 00, it treats it as an international prefix and replaces 00 with +.
3. If the input does not start with a + or 00, it strips all non-digit characters and prepends the selected country code.
4. It validates the final length to ensure it is between 7 and 15 digits after the + sign.