Free email platform export tools: clean an audience before you re-import it
No code. Drop in your Mailchimp, Klaviyo or other platform export and get the subscribed addresses back, in your browser.
Clean an audience export from Mailchimp, Klaviyo, Brevo, ActiveCampaign, Constant Contact, AWeber or a newsletter tool before you re-import it or move platforms. The tools read each platform's export columns, set aside unsubscribed and bounced contacts where the export marks them, and give you a list you can verify, so dead addresses stop counting toward a contact-based bill.
7 free tools
Mailchimp list cleaner
Reads Mailchimp's subscribed export, removes what Mailchimp would only find by bouncing (typo, dead and disposable domains), takes off your cleaned and unsubscribed contacts, then checks 10 mailboxes.
Klaviyo list cleaner
Reads a Klaviyo profiles CSV, flags bad syntax, duplicates, typo, dead and disposable domains, and takes off your suppressed profiles. Domains go to DNS; addresses stay in your browser.
Constant Contact contacts to email list
Reads a Constant Contact contacts export, sorts each contact by its email permission status (explicit, implicit, pending, unsubscribed), sets aside unsubscribes and bounces, merges repeats and keeps name, company, lists and tags.
Brevo contacts to email list
Reads a Brevo contacts export (comma or semicolon separated), sets aside contacts marked blocklisted or unsubscribed, reads FIRSTNAME/LASTNAME or PRENOM/NOM, merges repeats and keeps phone and lists.
ActiveCampaign contacts to email list
Reads an ActiveCampaign list export with its Status column, keeps Active contacts, sets aside Unsubscribed and Bounced ones, marks Unconfirmed as unknown, merges repeats and keeps phone, organization and tags.
AWeber subscribers to email list
Reads an AWeber subscriber CSV, keeps subscribed contacts, sets aside unsubscribed, deleted and complained ones, marks unconfirmed as unknown, merges repeats across lists and keeps name and tags.
Newsletter subscribers to email list
Reads a subscriber export from Substack, beehiiv, Kit (ConvertKit), Ghost or MailerLite and sorts every row into active, unconfirmed, unsubscribed, bounced or complained from that platform's own status columns. Only active subscribers are kept by default; paid subscribers are marked.