CSV Duplicate Filter & Formatter

Filter duplicate leads by email/phone and format Indian mobile numbers.

CSV Duplicate Filter & Formatter makes lead management painless by giving you two tools in one neat popup: Filter duplicate contacts Upload your Customers CSV and your Leads CSV. Automatically remove any lead whose email or phone (normalized and lower‑cased) appears in your customer list. Format Indian mobile numbers Upload any CSV, detect the “phone” column, strip out non‑digits, drop country/zero prefixes, and enforce a 10‑digit number starting with 6, 7, 8 or 9. Interactive review of invalid or questionable entries so you can keep or discard them before downloading a clean file. Why use it? Stop spamming customers who already bought. Clean your data for downstream marketing or CRM imports. Everything runs locally in your browser—no servers, no data leaks.