import from Letterboxd
Import
import from Trakt
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import from TMDB
Import
import from Simkl
Import
import from Criticker
Import
IMDb
Import
MAL
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TV Time
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import from text
Import
Unfortunately, streaming providers don't offer a public export function for your viewing history. In the meantime, you can try importing a text list.

Import from Simkl

1. Open your Export page
2. Scroll down and click Download Backup
Note: there are two Download Backup buttons. The first is for premium users - you want the second, the one under Simple .CSV file backup.
3. Upload the file here
and check the results
Done? Check your profile and watchlist