01
Upload your file
Choose a supported CSV contact file from your device.
Prepare CSV and VCF contact files for Google Contacts before importing.
Your data is processed locally in your browser whenever supported and is not uploaded to our servers.
How to use it
01
Choose a supported CSV contact file from your device.
02
Check the detected source, warnings, validation issues, and unmapped fields.
03
Export the prepared Google Contacts CSV and import it into your Google account.
What it checks
The tool helps surface common contact import problems so you can review them before creating your final file.
Recognizes supported Google Contacts and Outlook CSV structures.
Flags email addresses that appear malformed.
Surfaces repeated email addresses without silently merging contacts.
Highlights text that spreadsheet software may interpret as a formula.
Shows populated fields that could not be automatically mapped.
Creates a CSV formatted for Google Contacts import.
FAQ
Supported contact files are designed to be processed locally in your browser rather than uploaded to our server for processing.
No. Duplicate email addresses are surfaced as warnings. The tool does not silently merge or delete contacts for you.
Yes. The exported CSV is prepared in a Google Contacts-compatible format. We have also tested the export flow with a real Google Contacts import.
Unmapped populated fields are reported so they are not silently discarded without notice.