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Free tool · local processing

Check an international phone number before your WhatsApp campaign.

Choose a reference country, enter a phone number, and get its national, international, and E.164 formats. Your input never leaves this browser.

Your number stays in this browser.No storage and no request to Tiringo’s servers.

E.164 VALIDATOR

Test a phone number

Country when the number has no calling code
Phone number
Enter a number to begin.

What the result means

A valid number is not permission to start a campaign.

This tool checks whether the number fits a country’s numbering plan and converts it to consistent formats. It does not confirm that the number has a WhatsApp account, still belongs to the same person, or may legally receive marketing messages.

E.164 format

The canonical form begins with +, followed by the country calling code and national number without separators. It makes international imports and deduplication more reliable.

Country context

A local number without + can only be interpreted with a reference country. The same opening digits can mean something entirely different elsewhere.

A clear boundary

Structural validation does not replace WhatsApp opt-in, verification of the contact source, or a reliable process for honoring opt-out requests.

Have a complete file?

Validate phone numbers during import, not one row at a time.

Tiringo accepts CSV and Excel files with up to 100,000 contacts, maps columns with or without headers, normalizes international numbers, and adds valid contacts directly to a reusable group.

Import my file free See the complete Excel workflow

Common questions

Validate without overinterpreting.

Is the number sent to Tiringo?

No. Validation runs locally in your browser. The number you enter is not sent to a server.

Does this tool check whether the number uses WhatsApp?

No. It checks structure and validity against the country’s numbering plan, not whether a WhatsApp account exists.

What is E.164 format?

E.164 is an international representation that starts with +, followed by the country calling code and national number without separators.

Can I validate a complete Excel file?

Tiringo validates and normalizes phone numbers while importing a CSV or Excel file containing up to 100,000 contacts.