Format an international phone number by country

This formatter takes a phone number together with a two-letter country code, removes ordinary display punctuation, verifies the country calling code when one is supplied, and checks the exact national digit count. It then returns a clean international display form and compact E.164 form. Invalid lengths and mismatched calling codes produce an explicit error instead of a plausible-looking but unreliable result.

Provide a number and the country it belongs to

Enter the phone number in the form you already have and select its two-letter country code. National input may contain familiar separators such as spaces, parentheses, periods, or hyphens. You may also submit an international number beginning with a plus sign, or use the common 00 international prefix. When an international prefix is present, the formatter checks that its calling code agrees with the selected country. That check matters because the same sequence of national digits can look structurally valid in more than one place. The country is therefore an explicit instruction, not a guess based on the digits. For countries that use a domestic trunk zero, national input may retain that zero; it is removed where international notation requires its omission. The result includes the normalized ISO country code, calling code, national significant number, compact E.164 value, and a spaced display value. This makes the response useful both for human-facing interfaces and for normalized storage or downstream comparisons.

Understand what the validation guarantees

This tool performs structural validation for the countries listed in the country selector. It verifies allowed characters, the relationship between an explicit calling code and the selected country, and the expected number of national digits. A mismatch returns an error that names the country, expected count, and received count. That behavior is intentionally strict: silently padding, truncating, or inventing digits would create a number that belongs to nobody. Structural validity does not prove that a line is assigned, active, reachable, mobile, or owned by a particular person. It also does not contact a carrier or send a verification message. The formatter operates entirely on the supplied text using a fixed country-rule table. Because there is no network lookup, the same input always gives the same response, and the number is not shared with a directory service. Treat the output as a reliable representation of a structurally conforming number, not as evidence that the subscriber exists or has consented to contact.

Use the two normalized forms appropriately

The formatted field is designed for display: it begins with the plus-prefixed country calling code and separates the national digits into familiar country-specific groups. The e164 field removes those spaces and is better suited to databases, equality checks, API payloads, and links that expect a compact international value. Store the country code alongside the normalized number when your application needs to preserve the user's declared context. If you accept phone numbers in a form, validate them before saving so a digit-count error can be corrected while the user still has the source at hand. For imports, keep the original cell in an audit column and place the normalized result in a separate field; this prevents a cleanup operation from erasing evidence about the input. Applications should also preserve leading zeros by treating every phone value as text, never as a numeric type. Finally, remember that formatting is not permission: apply your normal consent, privacy, and messaging rules before using any returned number for calls or messages.