CardmendOpen the converter

Fix phone numbers in your contacts

Numbers saved without a country code break when you travel, change SIM or import into a CRM. Cardmend shows which numbers look wrong and can rewrite them all.

Open the converter

Free preview · no sign-up · runs in your browser

E.164 and friends

Choose E.164 (+972521234567), international (+972 52-123-4567), national (052-123-4567), or keep numbers as written. Numbers that can't be understood are left as they are, never guessed.

Default country

Numbers without + are read for the country you choose. The country is suggested from your browser settings and you can change it any time.

Arabic-Indic digits and 00 prefixes

Digits like ٠٥٠ and international prefixes like 00 are converted, and extensions are kept.

How it works

  1. Export your contacts as a vCard (.vcf) or CSV file from your phone, Google Contacts, iCloud or Outlook.
  2. Open the file in Cardmend. It is read on your device and is not uploaded.
  3. Fix phone numbers, review and merge duplicates, then download vCard, CSV or Excel.

What you get

Stays on your device

There is no server behind the converter, and the page's security policy blocks every network connection. You can turn off Wi-Fi after it opens.

Reads messy vCards

vCard 2.1, 3.0 and 4.0, quoted-printable text, folded lines, old character sets, photos, several phones and e-mails per person, iPhone custom labels.

Duplicates you can review

Groups are found by phone, e-mail and similar names. You see each group and choose which ones to merge and which name to keep.

Phone numbers in E.164

Numbers are checked with Google's phone number metadata and can be exported as +972521234567, in international or in national format.

Google, Outlook and Excel

Exports Google Contacts CSV, Outlook CSV, a clean CSV with one column per number, and Excel. Imports the same, plus any CSV with column matching.

Hebrew, Arabic and accents

Right-to-left names, niqqud and tashkeel, windows-1255/1256 files and UTF-8 come out readable, not as question marks.

Good to know

  • Cardmend works with files. It does not sign in to Google, iCloud or Outlook: you export and import the file there yourself.
  • Duplicate groups are suggestions. Similar names can belong to different people, so check each group before merging, and keep your original export.
  • Photos are kept in vCard exports. CSV and Excel only mark whether a contact has a photo. Old .xls files and iCloud contact groups are not supported.

Questions

Why is a correct number marked as wrong?

It is probably from another country than the default one. Numbers saved with + and the country code are always read correctly.

Where does the number data come from?

From libphonenumber-js, which uses the metadata of Google's open-source libphonenumber project. It is built into the app and works offline.

Are my contacts uploaded?

No. Cardmend runs in your browser. The converter page is not allowed to send data anywhere, and it keeps working offline.

What does it cost?

Opening files, checking duplicates and fixing numbers is free for all your contacts, and you can export up to 50 contacts. A lifetime key costs $9, paid once.

Which files can I open?

vCard (.vcf) from iPhone, iCloud, Android, Google, Outlook and older phones; Google and Outlook CSV; and any CSV or Excel .xlsx file, where you match the columns.