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, Kit, MailerLite, GetResponse, Omnisend, Drip, Flodesk, 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.
15 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.
Mailchimp audience to email list
Reads a CSV from Mailchimp's audience export ZIP: Email Address, names and TAGS kept, repeats merged; rows from the unsubscribed file (UNSUB_TIME) or the cleaned file (CLEAN_TIME) are set aside, so the same tool builds a suppression list.
Klaviyo profiles to email list
Reads a Klaviyo list or segment CSV: Email marketing consent sorted into subscribed, never subscribed and unsubscribed; any Email suppressions value sets the profile aside even when consent says Subscribed; repeats merged.
Kit subscribers to email list
Reads a Kit subscriber CSV: Status sorted into confirmed (kept), unconfirmed (kept as unknown), unsubscribed (set aside) and bounced, complained or blocked (always set aside); tags kept, repeats merged.
MailerLite subscribers to email list
Reads a MailerLite subscriber CSV: Status sorted into active (kept), unconfirmed (kept as unknown), unsubscribed (set aside) and bounced or junk (always set aside); groups kept as labels, repeats merged.
GetResponse contacts to email list
Reads a GetResponse contacts CSV or XLSX: one row per address with list names kept as labels and repeats across lists merged; a status or unsubscribe-reason column, when present, sets removed, unsubscribed and bounced contacts aside.
Omnisend contacts to email list
Reads an Omnisend contacts CSV: Email subscription status sorted into subscribed (kept), non-subscribed (kept as unknown) and unsubscribed (set aside, which in Omnisend also covers bounces and spam complaints); tags and total spent kept, repeats merged.
Drip subscribers to email list
Reads a Drip people CSV: the status column (active or unsubscribed) decides what is kept, tags are kept as labels and repeats merge; Drip's own columns such as created_at, confirmed_at and lead_score are recognised.
Flodesk subscribers to email list
Reads a Flodesk subscriber CSV, which holds every status: Active kept, Unconfirmed kept as unknown, Unsubscribed and Archived set aside, Bounced, Complained (marked spam) and Cleaned always set aside; segments kept as labels, repeats merged.
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.