Phone Number Formatter

E.164 is the international dialing standard that writes a number as a plus sign, the country code, then the national number with no spaces or punctuation, like +11234567890. Most messaging and telephony APIs, such as Twilio, expect numbers in this exact form.

For a clean 10-digit US number, National returns the familiar layout with the area code in parentheses, like (123) 456-7890. If the number carries a leading country code 1 across 11 digits, National keeps the code and returns +1 (123) 456-7890.

Yes. A US number that starts with the country code 1 across 11 digits is recognized, so 11234567890 becomes +1 (123) 456-7890 in National, +11234567890 in E.164, and +1 123 456 7890 in International.

The tool only applies special layout rules to standard US lengths of 10 or 11 digits. Anything else degrades gracefully to an international style: a plus sign followed by the digits grouped into space-separated triples from the right, so the value stays readable and usable.

Yes. Every non-digit character is stripped first, so inputs like (123) 456-7890, 123.456.7890, or 123 456 7890 all normalize to the same digits before they are reformatted.

No. This is a formatter, not a validator or lookup. It reshapes whatever digits you give it into the chosen layout but does not verify that the number is assigned, active, or dialable.

It shows how many digits the tool extracted from your input after removing punctuation. A US number should read 10 digits, or 11 with a leading 1, so the counter is a quick way to spot a missing or extra digit.

Yes, it never throws on partial input. If the digits do not match a standard US length, the National view falls back to a plus sign with the digits grouped in triples rather than showing an error, so you always get some output.

Yes. Formatting runs entirely in your browser using plain string operations. Nothing is uploaded, logged, or stored, so the numbers you paste never leave your device.