Google libphonenumber

At a glance

• Editor score
  6.9 / 10
• Pricing
  Open source
• Best for
  Developers needing open-source validation
• Paid from
  Free
• Validation modes
  Lookup
• Facts checked
  20 Sep 2026

• Where it wins

  • Parses, formats, checks, and validates international phone numbers
  • Detects number types and supports as-you-type formatting
  • Adds extraction, geographic, carrier, and time-zone mapping

• Where it doesn't

  • Does not determine whether a number is assigned or reachable
  • No bulk validation workflow
  • Designed for application integration, not a hosted validation service

Our verdict on Google libphonenumber

Google libphonenumber is an open-source library for developers integrating phone-number handling into applications. It supports Java, C++, and JavaScript, with capabilities covering international phone-number parsing, national and international formatting, possible-number checking, full validation, number-type detection, as-you-type formatting, and extraction from text. It is suited to teams that want to build phone-number logic into their own applications rather than adopt a hosted validation service.

Its main strength is breadth within phone-number processing. In addition to checking whether numbers are possible and valid, the library can identify phone-number types and provide geographic information, carrier mapping, and time-zone mapping. As-you-type formatting supports input experiences that need formatting while a number is entered, while text extraction helps identify phone numbers embedded in larger content. This makes it a fit for developers who need several related functions in one open-source component.

The key boundary is reachability. The library can report whether a number range is valid, but it does not determine whether a number is currently assigned to a user or reachable. It also does not provide bulk validation, so teams looking for a batch-oriented workflow or live contact verification should choose a different type of product. Pick Google libphonenumber when application-level parsing, formatting, validation, and metadata mapping are the priority; avoid it when the requirement is a hosted service, bulk processing, or confirmation that a number can currently receive contact.

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Google libphonenumber pricing

Google libphonenumber fact sheet

Alternatives to Google libphonenumber

• Neutrino Phone ValidateA budget-friendly API for high-volume phone validation and number enrichment.9.4
• Abstract Phone Validation APIA data-rich phone validation API with broad integrations and a free starting point.9.2
• VeriphoneA practical validator for API workflows, bulk CSV checks, and carrier data.9.0

See all Google libphonenumber alternatives →

Featured on iTechGuides

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update