Phone Number Validator
Validate one or many phone numbers for a country by dialing code and national length, showing each in E.164. Free, private, in your browser.
Validate phone numbers
Pick a country and paste one or more numbers (one per line).
What this phone number validator does
Common use cases
- 1Screening a phone list before an SMS send
- 2Catching malformed numbers
- 3Cleaning a contact import
- 4Validating form submissions
- 5Standardising to E.164
- 6Bulk-checking a spreadsheet column
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About phone number validation
Invalid phone numbers waste SMS spend and cause failed calls. A first, cheap check is the number length for the destination country — most countries have a well-known national significant number length.
This validator checks that length for your chosen country and shows the E.164 form. It is a format/length check, not a lookup: it can't tell whether a number is live or which carrier owns it, and exact length rules are included for common countries. For carrier-grade validation across every country, use a dedicated phone-number library or lookup API.
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How does validation work?
It checks the national number length for the country you select and shows the E.164 form. Exact length rules are included for common countries.
Does it confirm a number is real?
No. It is a format and length check — it cannot tell whether a number is live, assigned, or which carrier owns it.
Can I validate a list?
Yes. Paste one number per line and each is checked and marked valid or invalid.
Is my data uploaded?
No. Validation runs entirely in your browser.