Remove Duplicate Client Records From Legal CSVs Privately
Deduplicate client lists, case records, and contact exports without exposing confidential information to cloud services.
Client names and contact info never leave your machine
Safe for attorney-client privileged data
Free preview • $3 to download cleaned file
Sound familiar?
Client lists have duplicates from merging data across practice areas
Billing systems double-charge clients because of duplicate matter entries
Marketing emails go out multiple times to the same contact, damaging client relationships
Why Legal Administrators choose browser-based cleaning
Your firm merged with another practice and now has 3,000 client records with hundreds of duplicates. Some clients appear under slightly different names ("Robert Smith" vs "Bob Smith") or with old addresses. You need to clean this for your new CRM, but uploading client lists to online deduplication tools would violate confidentiality. CSVCleaner lets you find exact duplicates locally, keeping privileged data private.
Your data never leaves your computer
All processing happens in your browser
No cloud uploads required
Unlike AI tools that need your data
Works offline after loading
No internet needed to process files
No account or login needed
Just upload and clean
What you can fix
Exact Match Detection
Find rows that are perfect duplicates across all columns.
Column-Based Matching
Match duplicates by client ID, email, or case number only.
Keep First or Last
Choose whether to keep the original entry or the most recent.
Review Before Removing
Preview which duplicates will be removed before confirming.
Ready to clean your data?
Preview for free. See exactly what will be fixed before you pay. Your data stays in your browser the entire time.
Deduplicate Your Client List