How does NumSwift extract phone numbers from text?

NumSwift uses advanced pattern recognition to automatically identify and extract phone numbers from any text you paste. It supports international formats and validates numbers in real-time.

Can I send WhatsApp messages without saving contacts?

Yes! NumSwift allows you to send WhatsApp messages directly to any phone number without adding it to your contacts. Just extract the number and click the WhatsApp button.

Is my data safe when using NumSwift?

Absolutely. NumSwift is completely privacy-focused - all data processing happens locally in your browser. No text or phone numbers are sent to our servers.

Does NumSwift work with international phone numbers?

Yes, NumSwift supports phone numbers from all countries and automatically detects the country format. You can also manually select your country for better accuracy.

Can I extract multiple phone numbers at once?

Yes. NumSwift can extract many phone numbers from a single text block. It automatically deduplicates results and keeps up to 50 numbers for quick access.

How do I format a phone number for international calling?

Paste the number into NumSwift and select the correct country. NumSwift validates it and shows the properly formatted international version with the correct country code.

Phone Number Validator

NumSwift is a free phone number validator built on libphonenumber — the same library used by Google and Android. Paste any number and it checks the digit count, country code, area code pattern, and number type (mobile, landline, toll-free) against standards for 200+ countries. Validation runs in the browser in under one second with no data sent to a server.

Last updated: 2026-04-06

Extract Phone Numbers Instantly

Paste text to extract phone numbers and contact directly

How to Use the Phone Number Extractor

Start by pasting text with phone numbers to see them appear here!

1. Copy Text

Copy text with phone numbers

2. Extract Numbers

Paste & extract

3. Use the Numbers

Call, SMS, or WhatsApp

🔒 Privacy-First Tool

All processing happens in your browser. Your data never leaves your device and is not stored on our servers.

Need help or have feedback? Contact us - we'd love to hear from you!

💡 Pro Tips

• Paste text from emails, documents, or websites
• Works with international phone numbers from all countries
• Click WhatsApp to message without saving contacts
• Your extracted numbers are saved locally for quick access

Connect with the creator:

How to Validate a Phone Number

Select the country the phone number belongs to
Paste the phone number into the text box
NumSwift checks the format, digit count, and country code
Valid numbers appear with their formatted international version
Invalid numbers are rejected and won't appear in the results

What Validation Checks

Correct digit count for the selected country
Valid country code recognized by international standards
Recognized area code pattern for the region
Proper number type detection (mobile, landline, toll-free)

Frequently Asked Questions

▶How does NumSwift validate phone numbers?

NumSwift is powered by libphonenumber — the open-source library originally developed by Google and used in Android, Google Contacts, and major tech platforms worldwide. It checks the number's digit count, country code, and area code pattern against a continuously maintained database covering 200+ countries. Validation runs entirely in the browser and completes in under a second.

▶Can NumSwift check if a phone number is currently in service?

No. NumSwift performs structural validation — it confirms the number has the correct digit count, a valid country code, and a recognised area code pattern for its country. It cannot determine whether a number is currently assigned to a subscriber or active with a carrier. That type of check requires a live HLR (Home Location Register) lookup via a carrier API, which NumSwift does not perform.

▶Does it support international phone numbers?

Yes. NumSwift validates phone numbers from over 200 countries and territories, covering every ITU-assigned country code. You can paste a number with its country code prefix for automatic country detection, or manually select the country from the dropdown when working with local-format numbers that omit the prefix. It also identifies the number type — mobile, landline, or toll-free — where the country data allows.

▶What does "valid" mean for a phone number?

A phone number is considered valid when it passes all structural checks for its country: the correct total digit count, a recognised country code, and a valid area code or subscriber number pattern as defined by the ITU and national telecoms authorities. NumSwift uses libphonenumber's strict validation mode, which applies these rules across 200+ countries. Validity is a format guarantee, not a guarantee the number is reachable.