Clean up your contacts
Load a contact export, review the duplicates it finds, and download one clean file. Nothing is changed on your phone, computer, or Synology until you import the result yourself.
1
Load an exportOutlook contacts (.csv) or a Synology / iPhone .vcf. Add a second file to find what is only in one of them.
2
Review the matchesSure things (95%+) are pre-approved. Everything else waits for your Merge or Skip. Pick the name you want kept.
3
Download the resultAn Outlook-ready .csv and/or a .vcf, plus an audit log. Every note, phone, email, and address from every duplicate is kept.
Main contact file
Drop an Outlook export (.csv) or a .vcf here, or click to choose
+
Second file (optional)
e.g. your iPhone export — to compare the two lists
Matching settings
Show matches at or above
60%
A shared email or phone and a matching name. Groups with warnings (chained links, different companies, shared toll-free numbers) always wait for you.
Use this after each file has already been cleaned on its own.
Mac users: never double-click a .vcf file — Contacts will import every card into your Mac. Load it here instead, or Right-click → Open With → TextEdit to read it. Keep exports in a folder named "Do Not Open".
Ready to export
Importing into Outlook safely: Outlook contacts sync to every phone and computer. Never import the clean file over the live Contacts folder — that doubles every contact or misses the merges, everywhere. Instead: (1) back up the .pst; (2) create a new, empty contacts folder that is not synced; (3) File → Open & Export → Import/Export → Import from another program or file → Comma Separated Values → choose the clean .csv → import into that new folder; (4) check a few contacts with long notes; (5) don't replace the synced folder until a few test contacts have made the full trip Outlook → Synology → iPhone and a restore from the .pst backup has been practised. Pause CalDav Synchronizer on both the iBuyPower and the Dell while you work. Don't open the .csv in Excel first — Excel changes dates, phone numbers, and accents. Synology / iPhone / Mac use the .vcf instead.
Pick a contact
Choose a letter or search, then click a name to see everything on the card — including the full notes.