Question 1

What is E.164 format?

Accepted Answer

E.164 is the international phone number format standardized by the ITU. It starts with a + followed by the country code and subscriber number, with no spaces or dashes. Example: +14155552671.

Question 2

What phone number formats are supported?

Accepted Answer

The tool outputs E.164 international format (+1XXXXXXXXXX), national format with country code, dial format with dashes, and tel: URI format for clickable links.

Question 3

Can I format multiple numbers at once?

Accepted Answer

Yes. Switch to the Bulk tab and paste multiple phone numbers, one per line. All numbers will be formatted at once.

Question 4

Is my phone number data sent anywhere?

Accepted Answer

No. All formatting and validation happens in your browser. No data is sent to any server.