International Phone Number Converter
NumSwift is a free international phone number converter that transforms local numbers into E.164 format — the ITU standard required by WhatsApp, Twilio, and CRM platforms. Select from 200+ country codes, paste any local number, and get the correctly formatted international version in under a second. No account needed; runs entirely in the browser.
Last updated: 2026-04-06
Extract Phone Numbers Instantly
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
How to Convert to International Format
- Select the country the phone number belongs to using the country selector
- Paste the local phone number into the text box
- NumSwift validates the number and checks the format
- Get the full international format with the correct country code
- Use the converted number to call, SMS, or WhatsApp internationally
When You Need International Format
- Calling abroad from any country
- Messaging international contacts on WhatsApp
- Storing numbers in CRM systems or databases in E.164 format
- Sharing phone numbers with people in other countries
Frequently Asked Questions
▶How do I convert a local phone number to international format?
Select the country the number belongs to from the dropdown — NumSwift includes 200+ countries with their ITU-assigned dialing codes — then paste the local number into the text box. NumSwift applies the correct country code and converts the number to E.164 international format in under a second. The result is ready to use for international calls, WhatsApp, or CRM import.
▶What is E.164 phone number format?
E.164 is the ITU-T international standard for telephone numbers. It begins with a + sign followed by the country code (1–3 digits) and the subscriber number, with no spaces, dashes, or leading zeros — for example, +14155551234 for a US number or +447911123456 for a UK number. E.164 is the format required by WhatsApp, Twilio, most CRMs, and international carrier routing systems.
▶Why do I need international phone number format?
International E.164 format is required whenever a number must work outside its home country: calling abroad, sending WhatsApp messages (WhatsApp mandates E.164 for all numbers), importing contacts into CRM systems like Salesforce or HubSpot, or storing numbers in databases that serve a global user base. Local formats — which often omit the country code or use a trunk prefix like 0 — are ambiguous and can fail to route correctly in international contexts.
▶How do I find the country code for a phone number?
NumSwift includes a searchable country selector covering 200+ countries and territories with their correct ITU-assigned dialing codes. Select the country and NumSwift automatically prepends the right country code — for example, +1 for the US and Canada, +44 for the UK, +61 for Australia — and strips any local trunk prefix (such as a leading 0) that would be invalid in international format.