Every step below is from an official source
Switch from Dashlane to LastPass
What to do at Dashlane before you leave, what LastPass needs when you join, and everything else the switch touches. Your full plan is built in your browser and stays there.
Official sources reviewed . How we review sources
At Dashlane, before you leave
Export to CSV from the Dashlane web appBefore
In the web app, open the Vault menu, select Settings, then Export data, then Export to CSV. Dashlane downloads a ZIP file to your computer.
Export your Dashlane data to a CSVDashlane. ReviewedKnow what a CSV export leaves outBefore
Passkeys, attachments on Secure Notes, and 2FA tokens can't be exported to a CSV file.
Export your Dashlane data to a CSVDashlane. ReviewedMove passkeys with Credential Exchange insteadBefore
Passkeys can move between Dashlane and Apple Passwords, 1Password, Bitwarden and some other apps. They can't go in CSV files or DASH backups.
Can I share, import, export, or back up passkeys with Dashlane?Dashlane. ReviewedDelete the CSV files when you finishAfter
CSV files aren't encrypted and others can read them. Dashlane recommends deleting the CSV file from your device when you are done.
Export your Dashlane dataDashlane. Reviewed
At LastPass, when you join
Use a generic CSV if your manager isn't supportedBefore
If LastPass's on-screen import steps don't support your current password manager, you may be able to import a generic CSV file. Check first that your current manager can export to CSV.
How do I import stored data into LastPass using a generic CSV file?LastPass. ReviewedMatch your CSV columns to the LastPass templateDuring
Column titles must match LastPass's sample template. The columns are url, username, password, extra, name, grouping, fav and totp.
How do I import stored data into LastPass using a generic CSV file?LastPass. ReviewedUse passive import if your manager can't exportDuring
Run LastPass alongside your old password manager. Visit each site, let the old manager fill in your login, then add it to LastPass.
Then: everything else the switch affects
The steps above are what Dashlane and LastPass say. Your full checklist adds the accounts, codes, payments and devices that depend on your password manager, in a safe order. It's built from your answers, in your browser.