Does what I enter leave my browser?

The tool runs on your device. What you type, paste or drop stays there, and ScoreMachine receives none of it.

E.164 is the international phone number format. A plus sign comes first, then the country calling code and the national number. No spaces.

How are duplicates found?

Every number is converted to E.164 first. Two rows with the same E.164 string are duplicates, however each row was typed.

What about numbers without a country code?

The default country applies to every number with no country code. Numbers written with a plus sign or an international prefix keep their own country.

How big a file can I clean?

Up to 5 MB and 200,000 rows, the same limits as a workspace upload. The cleaned file uploads as it stands.

Free Tools

Convert Phone Numbers to E.164 Format

Paste a list or drop a CSV. Every number comes back in E.164, international and national form. Malformed rows are flagged and duplicates removed. The file stays in your browser.

Your first $5 of validations are on us, valid for 30 days. No card required.

Phone number formatter

Default country

GB · +44

Drop a CSV Up to 5 MB and 200,000 rows or click to choose a file

For business use. Contacts you submit should be ones you are entitled to contact. · Terms · Data & opt-out

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Frequently Asked Questions

Yes, with no limit and no account.

Validate the List You Cleaned

Upload a file in a free workspace, or walk through your use case with our team.

What the full phone check returns, on the Phone Validation page. · All free tools

Convert Phone Numbers to E.164 Format

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Frequently Asked Questions

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