Duplicate Detection
- Combined name, email, and phone matching evidence for each set of duplicates
- Side-by-side field comparison and a merged contact preview
- Keep Separate remembers your decision while contact details stay unchanged
Mac
Contacts Toolkit Professional contact management.
Find duplicates, compare changes, and organize your address book on your Mac. A redesigned workspace keeps your contacts, cleanup tools, and operation history together.
See App Store for price · One-time purchase · No subscription
- macOS 15.0+
- 16 Languages · 17 Localization Variants
Workspace
Review35
Contacts
Organize
History
Search contacts
Review
Review Required5
Alex Example2 contacts to mergeHigh Risk
Morgan Example3 contacts to mergeHigh Risk
Jamie Example2 contacts to mergeHigh Risk
hello@example.comMissing given and family namesMedium Risk
Drew Example2 contacts to merge
Alex Example
Shared email addressShared phone number
2 contacts 1 merged contact
These contacts may belong to different people. Compare the conflicting identifying details before merging. If they are different people, choose Keep Separate.
Choose values to keep
Job TitleDesign Lead
Contact 1 · Imported vCard
Job TitleDesigner
emailalex@example.com
mobile2025550100
Contact 2 · Imported vCard
Job TitleDesign Lead
emailalex@example.com
mobile+1 (202) 555-0100
work6465550100
Merged contact
NameAlex Example
Job TitleDesign Lead
emailalex@example.com
mobile+1 (202) 555-0100+12025550100
work6465550100+16465550100
More actions
Keep Separate
Skip for Now
Preview Merge
Morgan ExampleNew in 6.2.0
3 contacts 1 merged contact
Notes · Original contacts
Contact 1Met at the neighborhood design meetup.
Contact 2Met at the neighborhood design meetup.
Contact 3Prefers a call after 2 PM.
Notes · Merged contact
Met at the neighborhood design meetup.
blank line
Prefers a call after 2 PM.
Identical Notes appear once
Distinct Notes, separated by a blank line
CancelMerge Contacts
History
Recorded operation outcomes and contacts kept separate.
- Apply Quick WinsCompleted
- Format selected postal addressesCompleted
- Format selected phone numbersCompleted
- Kept separate: 2 contacts kept separateReview Again
Format Phone Numbers
Review the current and proposed values. Only selected contacts are included in this operation.
Selected contacts: 2Select AllDeselect All
CurrentProposed
Alex Example
mobile+1 (202) 555-0100+12025550100+12025550100
work6465550100+16465550100+16465550100
Casey Example
mobile6175550106+16175550106+16175550106
Drew Example
mobile6465550102+16465550102
Imported vCardDoneApply to Selected Contacts
Screenshots
See it in action
Explore the Review workspace, merge previews, Quick Wins, formatting tools, and History in version 6.0.0.
Your contact Notes, included
Read and edit contact Notes directly in Contacts Toolkit. Keep important context with your contacts as you review duplicates and organize your address book.
Review Notes before merging
Review and edit the combined Notes in the merge preview. Identical Notes appear once, and distinct Notes are separated by blank lines.
Keep Notes with your contacts
Notes are preserved when you copy or move contacts between accounts.
Back up Notes locally
New automatic backups include contact Notes. When a backup is available, recover saved contacts as copies from History.
Features
Powerful features
Everything you need to keep your contacts and groups clean, organized, and up to date.
International Support
- Latin, CJK, Arabic, and Cyrillic name scripts
- Phone-number formatting for 40 countries
- 16 languages through 17 localization variants, including Serbian in Latin and Cyrillic
- Address formatting for 32 countries with postal code validation
Smart Organization
- Duplicate field resolution for phones, emails, URLs, and relationships
- Smart issue queue: Quick Wins, Needs Attention, Review Required
- Merge duplicate groups, remove empty groups, and move or copy contacts between accounts
Safety & Control
- Review every Quick Wins decision before applying a batch
- When enabled, local vCard backups before supported bulk operations on Mac Contacts
- Contacts access is optional: scan Mac Contacts, import a vCard, select contacts, or use sample data
- One-time purchase with no subscription
Specifications
Technical specifications
Built for macOS with privacy and performance in mind.
- Platform
- macOS 15.0+
- Phone Formats
- 40 Countries
- Address Formats
- 32 Countries
- Languages
- 16 / 17 Variants
- Privacy
- No Automatic Uploads
- Family Sharing
- Up to 6 Members
Age Rating: 4+ · English, German, Spanish, French, Italian, Japanese, Korean, Chinese, and more
Ready to clean up your contacts?
Get Contacts Toolkit today and bring order to your address book.
One-time purchase · No subscription