Contact Duplicate Finder

Review exact duplicate contact signals before deciding whether to merge anyone.

Choose one CSV or VCF contact file

Only exact normalized email or phone matches are grouped. Similar names are never guessed.

Your contacts stay in your browser and are never uploaded.

Your data is processed locally in your browser whenever supported and is not uploaded to our servers.

How it works

Review duplicate contacts before anyone is merged

Choose a CSV or VCF contact export.

Groups use the same normalized phone number or email only.

Select Merge only for contacts you have reviewed.

Will it merge people automatically?

No. Every group starts with Keep all. You must select Merge for each group separately.

What makes a duplicate group?

Only an exact normalized email address or phone number. Similar names are never guessed.

Why are different names highlighted?

A shared household or office phone does not prove two contacts are the same person. The warning helps prevent accidental deletion.

What happens when I merge?

The merged contact keeps all distinct emails, phones, labels, addresses, and preserved fields from the selected group.

Are contacts uploaded?

No. Reading, grouping, reviewing, and export all run locally in your browser.

Keep working

Convert VCF and vCard contact files into an editable CSV directly in your browser.

Convert a contact CSV into a vCard file for iPhone, Android, and other contact apps.

Extract embedded contact photos from one or more VCF files and download them as a ZIP.