google/libphonenumber

Health v2 · maintenance only

Adoption not part of the score

18232 stars · 2172 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Google's multi-language (Java, C++, JavaScript) library for parsing, formatting, and validating international phone numbers for all countries and regions. It also provides number-type detection, matching, geocoding, carrier, and timezone lookup for phone numbers.

Use cases

• validate international phone numbers in a signup form
• format phone numbers as users type
• parse user-entered phone numbers into E.164
• detect whether a phone number is mobile or landline
• find phone numbers inside free text
• get carrier or timezone info for a phone number

When to choose

• you need reliable, globally comprehensive phone number parsing and validation
• you want as-you-type formatting in a UI
• you need metadata-backed number type, geocoding, or carrier lookup

When to avoid

• you only handle numbers from a single country with simple rules
• you need real-time line status or number portability data
• your platform lacks Java, C++, or JavaScript support and no port exists

Facets

library · maturity stable

parser serialization internationalization developer-tools developer-tools web-development mobile-development jvm cpp cross-platform phone-numbers validation formatting e164 geocoding carrier-lookup localization javascript android

Member repositories

For agents

markdown · JSON · MCP: product_card(name="google/libphonenumber")