Remove Duplicate Property Listings Without Uploading Client Data
Deduplicate MLS exports, client lists, and transaction records — sensitive data never leaves your browser.
Client contacts and property data stay local
Safe for brokerage transaction records
Free preview • $3 to download cleaned file
Sound familiar?
MLS downloads have the same property listed multiple times with updates
Client contact lists have duplicates from multiple lead sources
Transaction tracking is inaccurate because of duplicate entries
Why Brokerage Administrators choose browser-based cleaning
Your monthly MLS download has 2,000 listings, but many properties appear multiple times — once for the original listing, again for price changes, and again for status updates. Your market analysis is skewed. The client list you're building for a mailer has duplicates from Zillow leads, open house sign-ins, and your CRM. CSVCleaner finds duplicates by MLS number or email without uploading anything.
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
MLS Number Matching
Deduplicate by unique listing identifier.
Address-Based Detection
Find same property with different MLS numbers.
Client Email Matching
Deduplicate lead lists by email address.
Keep Latest Entry
Preserve most recent listing status or contact info.
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 Listings