Google's library for parsing, formatting, and validating international phone numbers across Java, C++, and JavaScript.
libphonenumber is Google's open-source library for parsing, formatting, and validating international phone numbers. It solves the problem of handling phone numbers consistently across different countries and formats, providing accurate validation and useful metadata like geolocation and carrier information.
Developers building applications that require international phone number handling, such as contact forms, user registration systems, telecommunication apps, and Android applications.
Developers choose libphonenumber for its accuracy, comprehensive global coverage, and official Google backing. It offers a robust, battle-tested solution with features like as-you-type formatting and geocoding that are difficult to implement correctly from scratch.
Google's common Java, C++ and JavaScript library for parsing, formatting, and validating international phone numbers.
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Parses, formats, and validates phone numbers for all countries/regions worldwide, ensuring accuracy across diverse international formats as highlighted in the README.
The AsYouTypeFormatter formats numbers in real-time as users input digits, improving UX in forms, with examples provided in the quick examples section.
Offers geocoding, carrier mapping, and timezone data for phone numbers, adding contextual information that's difficult to implement from scratch.
Includes methods like isPossibleNumber for quick validation based on length, balancing speed and accuracy, as noted in the functionality highlights.
Only maps to original carriers, not current ones, due to number portability—a caveat explicitly admitted in the README, limiting real-time use cases.
The official JavaScript version depends on Google Closure, resulting in a large bundle (~420 KB), as mentioned in alternatives, which can impact web app performance.
Regular metadata updates are required for accuracy, but managing and integrating these changes can be complex, especially for porters, as noted in versioning announcements.