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Preview of Movie Rating Sync

Movie Rating Sync by Smokelweiss

A cross-platform userscript to sync, backup, and migrate your movie ratings between Kinopoisk, IMDb, and Letterboxd.

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Extension Metadata

About this extension
  • 🔄 Full Cross-Platform Support — Import and export functionalities are available across all supported websites.
  • 📦 Universal Format — Download your ratings from any service into a structured CSV file.
  • 🧠 Smart Title Matching — Utilizes transliteration, fuzzy search, and release year tolerance to help map titles across different services.
  • ⚡ Dual Sync Modes:
  • Normal Mode — Skips already rated/watched titles to save time.
  • Replace Mode — Overwrites existing ratings with the latest data from your file.
  • 🛡 Adaptive Throttling — Automatically adjusts request speed based on server responses to avoid rate limits (429 errors).
  • 🔍 Deep Search — An optional HTTP search fallback for titles not found in the local cache.
⚠ Note on Matching: Title translation and matching across networks is complex. The deep search is not perfect — some rare, indie, or localized titles may require manual adjustment during the sync process.


| Service | Export | Import |
| :--- | :---: | :---: |
| Kinopoisk | ✅ | ✅ |
| IMDb | ✅ | ✅ |
| Letterboxd | ✅ | ✅ |

  1. Log into your profile on the source website (e.g., Kinopoisk).
  2. Click the 📥 Export ratings to CSV button and save the file.
  1. Log into the destination website (e.g., IMDb).
  2. Click 📥 Import (or 🔄 Hard Replace if you want to overwrite existing ratings).
  3. Select your downloaded CSV file and monitor the synchronization process.
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Permissions and data

Required permissions:

  • Access your data for www.kinopoisk.ru
  • Access your data for graphql.kinopoisk.ru
  • Access your data for www.imdb.com
  • Access your data for api.graphql.imdb.com
  • Access your data for letterboxd.com

Data collection:

  • The developer says this extension doesn't require data collection.
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Version
1.0
Size
32.64 kB
Last updated
17 days ago (29 Jun 2026)
Related Categories
  • Social & Communication
  • Alerts & Updates
Licence
GNU General Public Licence v3.0 only
Version History
  • See all versions
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