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LastPass to Mozilla Firefox converter

LastPass and Mozilla Firefox both use CSV, but LastPass writes 8 columns; Mozilla Firefox expects 3 in a different order — so Firefox rejects a raw LastPass export or silently files everything into the wrong fields. Drop your export below and get back a file Firefox accepts.

Convert your LastPass export

Drop your LastPass CSV here or click to choose a file — nothing is uploaded

The conversion runs entirely in this tab using JavaScript. Your file is never sent to a server — you can confirm it by opening your browser's Network tab, or by turning off Wi-Fi before you drop the file in. Prefer not to do this in a browser tab at all? Download the converter and run it from your own disk.

Your export file is plaintext. Both the file LastPass gives you and the one you download here contain every password in readable form. Delete them as soon as the import is verified, and empty your trash.

What's actually different between the two formats

Not one column name matches between the two formats (url, username, password… versus "url", "username", "password"…), which is why a direct import fails.

LastPass column	Mozilla Firefox column	What happens
`name`	`— none —`	Firefox has no item name field. Written into notes instead of dropped.
`username`	`username`	Same name, position adjusted
`password`	`password`	Same name, position adjusted
`url`	`url`	Same name, position adjusted
`totp`	`— none —`	Firefox has no 2fa secret field. Written into notes instead of dropped.
`extra`	`— none —`	Firefox has no notes field. Written into notes instead of dropped.
`grouping`	`— none —`	Firefox has no folder field. Written into notes instead of dropped.
`fav`	`— none —`	Firefox has no favorite field. Written into notes instead of dropped.

What carries over

Field	LastPass	Firefox	Result
Item name / title	Yes	No	Firefox identifies logins by URL only, so titles are dropped.
Username and password	Yes	Yes	Carried over
Website URL	Yes	Yes	Carried over
Notes	Yes	No	Dropped — the target has no notes field.
Folders / groups	Yes	No	Written into the notes field as "Folder: …" so you can re-sort later.
Two-factor (TOTP) secrets	Yes	No	Written into notes. Re-add them by hand, or keep them in a separate authenticator.
Favorites	Yes	No	Dropped — re-star your important entries after importing.
Custom fields	Yes	No	Flattened into notes as name: value pairs.
Multiple URLs per entry	No	No	Not in the source file
File attachments	Yes	No	No CSV export includes attachments. Download them out of LastPass separately before you close the account — this is the one thing people lose permanently.

Step 1 — Export from LastPass

Sign in to your LastPass vault in the browser extension or at lastpass.com.
Open Advanced Options → Export.
Re-enter your master password and complete the email confirmation if prompted.
LastPass either downloads a CSV or prints the data to a browser page — if it prints to the page, copy all of it into a plain text file and save it as .csv.

Official instructions: LastPass export documentation

Watch out for

Secure notes come out in the same CSV as logins, with the note body in the "extra" column and url set to http://sn. Converters that ignore this turn every note into a broken login.
LastPass sometimes renders the export as an HTML page instead of downloading a file. Copy the raw text — do not save the page itself.

Step 2 — Convert it

Drop the file onto the converter above. It parses LastPass's layout, maps each field onto the universal record, then writes Mozilla Firefox's exact expected columns — including the empty ones its importer requires and, where the two differ, the right shape for 2FA secrets. You'll see a preview and a list of anything Firefox can't hold before you download.

Rather not put this file in a browser tab connected to the internet? The same converter is available as a single HTML file you can download and open with your network switched off.

Step 3 — Import into Mozilla Firefox

Go to about:logins in Firefox.
Open the ••• menu → "Import from a File…".
Choose the converted CSV.

Watch out for

Firefox has no concept of a title, folder, note or TOTP secret. Entries are identified by URL alone, so an entry name has nowhere to go.
Firefox writes its header names in quotes ("url","username",…). Some importers choke on that; the converter normalizes it.

Step 4 — Verify and clean up

Open ten entries in Mozilla Firefox at random and check them against LastPass.
Your folder names were written into each entry's note. Re-sort them however Firefox organizes items.
Sign in to one real site using Mozilla Firefox to confirm autofill works.
Delete both CSV files and empty your trash. If your Downloads folder syncs to iCloud, OneDrive or Dropbox, confirm the deletion propagated there too.
Only then close your LastPass account — and change any password you suspect was exposed while the plaintext file existed.

Questions

Why won't Mozilla Firefox import my LastPass file directly?

Not one column name matches between the two formats (url, username, password… versus "url", "username", "password"…), which is why a direct import fails. The converter rewrites the file into Mozilla Firefox's exact expected layout, including the column order and any empty columns its importer requires.

Do my passwords get uploaded anywhere?

No. The conversion is JavaScript running in your own browser tab — the file is read with the FileReader API, transformed in memory, and handed back to you as a download. There is no upload, no server-side processing and no analytics attached to the file. You can verify this by disconnecting from the internet before you drop the file in: the conversion still works.

What gets lost moving from LastPass to Mozilla Firefox?

Mozilla Firefox can't natively store: item name / title, notes, folders / groups, two-factor (totp) secrets, favorites, custom fields, file attachments. Rather than drop that data, the converter writes it into the notes field where Firefox has one, so you can move it back by hand. Keep your LastPass account active until you've confirmed everything you need made it across.

Can I keep my 2FA codes in Mozilla Firefox?

No — Mozilla Firefox has no field for TOTP secrets at all. The converter puts each secret into the entry's note so it isn't lost, but Firefox won't generate codes from it. Move those to a dedicated authenticator app before you shut down LastPass, or pick a target that supports them.

Is the export file from LastPass encrypted?

No. A LastPass CSV export is plaintext — every password in it is readable by anything that can open the file, including other apps on your machine and anything that syncs your Downloads folder to the cloud. Convert it, import it, then delete both files and empty your trash. If your Downloads folder syncs to iCloud, OneDrive or Dropbox, check that the deletion propagated.

Anything unusual about LastPass's export?

Secure notes come out in the same CSV as logins, with the note body in the "extra" column and url set to http://sn. Converters that ignore this turn every note into a broken login.

Anything unusual about importing into Mozilla Firefox?

Firefox has no concept of a title, folder, note or TOTP secret. Entries are identified by URL alone, so an entry name has nowhere to go.

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