Convert messy numbers like 06-12345678, (555) 201-3344 or 0031 6 2345 6789 to the international E.164 format (+31612345678) that HubSpot, Salesforce, WhatsApp, Twilio and Meta/Google Ads expect. Numbers that can't be converted safely are flagged, never guessed.
CSV or Excel. We detect the phone column automatically — change it if needed.
Used for local numbers without a + or 00 prefix, e.g. 06… becomes +316…
See every before → after, check flagged numbers, then download through the SheetFix cleaner.
E.164 is the international phone number standard: a + sign, the country code and the subscriber number, with no spaces or punctuation, up to 15 digits. Example: +31612345678.
Tools like HubSpot, Salesforce, Twilio, WhatsApp Business and Meta/Google Ads Customer Match match contacts reliably only when numbers are in E.164.
They stay unchanged and are marked 'valid: no' so you can fix them manually. SheetFix never invents digits.
Yes. By default a new '(E.164)' column is added next to the original, plus a validity column.
No. Your file is processed in your browser.
Lowercase emails, flag invalid ones and remove duplicate contacts.
Prepare CSV/Excel for Shopify, HubSpot or Salesforce: field mapping, validation, safe fixes.
Fix spaces, emails, phone numbers, dates and capitalization.
Full name → first, prefix and last name (van/de/von aware).