Phone Number Formatter
Format and validate international phone numbers.
How to Use
- Enter a phone number in any format (e.g. 13812345678, +1-800-555-0199, or (212) 555-0100).
- Select the target country or format standard — the tool parses and reformats the number to E.164 international standard or the selected local format.
- Copy the formatted phone number for use in your application or records.
Frequently Asked Questions
- What is E.164 format?
- E.164 is the international telephone numbering standard defined by ITU-T. Numbers in E.164 format start with a + sign followed by the country code and the subscriber number, with no spaces or punctuation (e.g. +14155552671). This format is required by most APIs and SMS services.
- Does it support international numbers?
- Yes — the formatter supports phone numbers from most countries. Select the appropriate country to apply the correct country code and local formatting rules.
- Does formatting change the validity of the number?
- No — formatting only changes how the number is displayed (spacing, punctuation, country code prefix). It does not verify whether the number is actually assigned or active. For production use, validate numbers with a telecom API.