Free tool
Clean and normalize phone numbers in a CSV.
Turn '(415) 555-1234', '4155551234', '+1 415.555.1234', and '415-555-1234' into one clean, consistent format across every row.
Everything runs in your browser. Nothing is uploaded.
Drop a CSV or Excel file here
Or choose a file — nothing leaves your browser.
After you drop a file, you'll see the Normalize phone numbers action highlighted for you.
Common questions
Which formats can I output?
E.164 (+14155551234), US pretty ((415) 555-1234), and digits only (4155551234).
Does it work for non-US numbers?
Numbers that start with '+' are preserved as E.164-style digits. Full international parsing per country (with libphonenumber) is on the Pro roadmap.
Does it validate that numbers are real?
It normalizes format only. It does not check whether a number is assigned or live — carrier lookup requires a paid data source.