Duplicate contacts and badly formatted emails mess up your CRM and newsletter tool. SheetFix lowercases and trims emails, flags invalid addresses and removes duplicate contacts — previewed before you download.
Drop a CSV or Excel export from your CRM, webshop or sign-up form.
Trim spaces, lowercase emails and remove duplicate email addresses in one go. Invalid emails are flagged, not deleted.
Download a clean CSV ready for HubSpot, Mailchimp, Brevo or any tool that imports CSV.
No. It checks the email format and flags invalid addresses; it does not send test emails or ping mail servers.
No. They are flagged so you can decide what to do with them.
Yes. Rows with an email address that already appeared earlier are removed; the first one is kept. You can see every removed row.
No. Your file is read and cleaned in your browser.
Prepare CSV/Excel for Shopify, HubSpot or Salesforce: field mapping, validation, safe fixes.
Find and remove duplicate rows, review near-duplicates.
Format phone numbers as +31612345678 for CRM and ad imports.
Fix spaces, emails, phone numbers, dates and capitalization.