Convert any phone number list to E.164 international format. Works with ElevenLabs, Vapi, Twilio, Bland AI and more. Upload a CSV or paste your numbers.
formatted.csv — Ready for ElevenLabs
Formats for the platforms you already use
If you run batch calling, you already know the drill — export the list, wrestle it into shape, hope the dialer accepts it. Here's what that really costs.
Teams routinely spend 3–5 hours a week hand-cleaning spreadsheets — stripping spaces, brackets and dashes, adding country codes and fixing leading zeros before a single call goes out.
One malformed number and the dialer skips it without warning. A list that is 10–20% wrongly formatted quietly wastes a fifth of every campaign.
ElevenLabs, Vapi, Twilio, Bland and Retell all expect strict E.164. Anything else gets bounced at upload, and someone has to start the clean-up over again.
to format thousands of numbers that used to take hours
saved per week for a typical outbound team
E.164-valid lists your dialer accepts on the first try
No setup calls, no onboarding forms. Here's exactly what happens after you join.
Sign up in seconds — no credit card. You get 10 free formats a month to try it on a real list right away.
Drop in a CSV or Excel file, or paste numbers straight from anywhere. We auto-detect the phone column and the country.
Every number is converted to international E.164, duplicates removed, and exported as a ready-to-upload CSV with the right header.
Paste your platform API key once on the Connections page — it takes under a minute — and launch batch calls without ever leaving BatchFormatter.
Built specifically for teams that run batch calling campaigns
Upload your existing spreadsheet and we'll auto-detect and reformat the phone number column.
Format numbers from the UK, US, Australia, Germany, France, India and 10+ more countries.
Every number is formatted to the international E.164 standard — exactly what batch calling platforms need.
Automatically detect and remove duplicate numbers so you never call the same person twice.
Download your formatted numbers as a ready-to-upload CSV with the phone_number header — zero manual editing.
Track all your formatting jobs. See stats, revisit past exports and monitor your monthly usage.