Backloggd Data Transfer

Userscript that imports game logs into Backloggd from other platforms via a unified transfer JSON (or CSV). Backloggd has no native import/export — this fills that gap.

Compatible with Tampermonkey, Violentmonkey, Greasemonkey, ScriptCat, and similar managers.

Status: early (0.7.0). Runs on Backloggd only. Transfer format v2 mirrors the native log POST body. Import, CSV mapping, match cache, and multi-log cleanup are live; full library export is next.

Companion to Backloggd Plus (enrichment UI). Not affiliated with Backloggd.

How it works
Install
Using the panel
Import wizard
Cleanup
Cache, history & settings
Transfer format
Development
Roadmap
License

How it works

Other platforms / CSV / tools
        │
        ▼
  transfer JSON (v2)  ──►  Backloggd Data Transfer  ──►  POST logs
        ▲
        │
  Backloggd library   ──►  transfer JSON   (export — planned)

Produce a backloggd-transfer file (format spec), or a CSV you’ll map in the panel.
On backloggd.com (signed in), open Transfer in the navbar (or the userscript menu).
Walk the import wizard: file → (optional CSV map) → match & review → write logs.
Optionally use Cleanup to find games with more than one log and tidy them on the site.

Prefixes bdt_ / data-bdt-* keep storage and DOM separate from Backloggd Plus (blp_).

Install

Install a userscript manager (Tampermonkey, Violentmonkey, Greasemonkey, ScriptCat, …).
Click Install userscript, or open the raw file:

https://raw.githubusercontent.com/NemoKing1210/backloggd-data-transfer/main/backloggd-data-transfer.user.js

Confirm the install in your manager, then visit backloggd.com while logged in.

Local build: run npm run build and install backloggd-data-transfer.user.js from the repo root (do not hand-edit that file — it is generated).

Updates: managers pick up new versions via @updateURL / @version when you bump and rebuild.

Using the panel

Entry point	Where
Navbar Transfer	Same slot as Log a Game / Plus (`#bdt-nav-transfer`)
Userscript menu	“Backloggd Data Transfer”

Tab	Purpose
Import	Stepped wizard: JSON or CSV → match → write logs
Export	Placeholder until library export ships
Cleanup	Scan for games with 2+ logs; deep-link to tidy
History	Recent transfer sessions
Cache	Match cache meter, stats, clear actions
Settings	Language, delays, parallelism, debug
About	Version, author, links

UI languages: English and Russian (or follow browser locale).

Import wizard

Steps

Step	What happens
File	Choose Transfer JSON or CSV, drop/browse a file, optional example download
Map	CSV only — column mapping + status / rating / platform value maps
Review	Parallel title match, filters, selection, summary stats
Import	Parallel `POST` of selected matches with live progress

Transfer JSON

Use the canonical backloggd-transfer document (version 2). Fields align with Backloggd’s create-log form (log, playthroughs, dates). v1 files are still accepted and migrated on read.

CSV

Auto-detect columns (title, status, rating, dates, platform, …).
Adjust mappings; map non-Backloggd labels (e.g. Notion / Plus-style statuses) to canonical values.
Manual vs auto mappings are labeled; only manual choices are remembered for next time.
Continue to the same Review → Import flow as JSON.

Matching & review

Titles resolve via Backloggd autocomplete; hits fill game_id / slug.
Match cache reuses previous title → game lookups (skips network on hits).
Duplicate titles in the file are deduped before match; the summary reports what was removed.
Your library is indexed so rows already logged can be marked and left unchecked by default (Import existing off).
Unmatched rows: paste a Backloggd game_id or /games/slug/ URL to resolve manually.
Filters: your log (existing / new), match status, cache vs live, selection; search by file or Backloggd title.
Progress shows parallel in-flight title chips while reading.

Writing logs

Creates logs with the same form fields as the native editor (CSRF + user id from the page session).
Parallel writes use the same concurrency setting as Read / Cleanup.
Live log: progress bar, active game chips, ok / fail / skip counters, elapsed time.
Skips (e.g. already in library) are separate from failures.
Sign-in required; if user id cannot be inferred, the panel asks for it.

Cleanup

After imports (or anytime), open Cleanup:

Scan your library for games with more than one log.
Expand a card to see each log (rating, platform, dates / badges).
Open logs on Backloggd to merge or delete duplicates manually.

Scanning uses the same parallel request pool as import (library pages + per-game probes).

Cache, history & settings

Cache

Stores successful and negative title → game matches (with TTLs).
Meter shows approximate fill vs a soft budget; stats for hits/misses, history, CSV maps, settings.
Clear game cache, or Clear all cache (matches + history + CSV maps; settings kept).

History

Keeps the latest transfer sessions so you can see what you imported recently.

Settings

Setting	Notes
Language	Auto, English, or Russian
Import delay	Pause between network waves (ms)
Parallel requests	Concurrent lookups / library / import (1–8)
Debug mode	Extra detail on Review (e.g. indexed library sources)

Transfer format

Full specification: docs/transfer-format.md.

Minimal document:

{
  "format": "backloggd-transfer",
  "version": 2,
  "exportedAt": "2026-07-18T12:00:00.000Z",
  "source": {
    "platform": "custom",
    "label": "my-library.json"
  },
  "entries": [
    {
      "game_id": null,
      "title": "Raft",
      "slug": "",
      "log": {
        "game_liked": false,
        "is_play": true,
        "is_playing": false,
        "is_backlog": false,
        "is_wishlist": false,
        "status": "completed",
        "total_hours": null,
        "total_minutes": null,
        "time_source": 1,
        "override_cover_id": null
      },
      "playthroughs": [
        {
          "title": "Windows PC",
          "rating": 5,
          "review": "",
          "review_spoilers": false,
          "platform": 6,
          "start_date": "2024-08-02",
          "finish_date": "2024-08-03"
        }
      ],
      "dates": []
    }
  ]
}

`log.status`	Meaning on Backloggd
`wishlist`	Wishlist
`backlog`	Backlog
`playing`	Playing
`played`	Played (nothing specific)
`completed`	Completed (main objective)
`shelved`	Shelved
`abandoned`	Abandoned
`retired`	Retired

Ratings use Backloggd’s 1–10 half-star scale. game_id may be null — the Read step resolves it from title.

External tools and future source adapters should emit this JSON; the Backloggd importer stays shared. Notion already has native export — this project does not scrape Notion.

Development

Same toolchain as backloggd-plus: Vite + vite-plugin-monkey.

npm install
npm run dev      # Vite serve — install the "dev:" userscript from the open URL
npm run build    # Production → dist/ + copy to root install artifacts
npm run ci       # build + verify dist ↔ committed .user.js / .meta.js

Requires Node.js 20+ (see .nvmrc).

Path	Role
`src/main.js`	Bootstrap
`src/format/`	Schema, parse, serialize, CSV, status maps
`src/destinations/backloggd/`	Search, create-log, library, multi-log scan
`src/features/`	Panel, import, cleanup, cache, settings, toast
`src/i18n/`	en + ru
`docs/transfer-format.md`	Format spec
`backloggd-data-transfer.user.js`	Canonical install artifact (generated)

Edit under src/, then npm run build. Version source of truth: package.json → drives @version, in-app version, and CI artifact checks. User-visible changes: bump version + CHANGELOG.md, then rebuild. See AGENTS.md for conventions.

Roadmap

Project scaffold + transfer format (v2)
Backloggd search + live log import
CSV import with column / value mapping
Match cache + history + settings
Multi-log cleanup scan
Parallel read / library / import
Export library from Backloggd → transfer JSON
Additional source adapters as needed

License

MIT

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