Tsumiru

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Migrate manga between sources ​

Sources come and go. A site shuts down, an extension breaks, or another source has better scans. Migration moves a series in your library from one source to another without losing your place: the new entry takes over, and your reading progress, categories, and reader settings come along.

Whether you're moving one series or clearing out a dead source, it's the same flow: pick where the series should go, review the matches, then migrate or copy.

Start a migration ​

There are three ways in:

  • One series: open it, then tap Migrate (the ⋮ menu on phone, the swap-arrows button on tablet and desktop).
  • A selection: multi-select series in your library and choose Migrate.
  • A whole source: open Browse → Migrate, tap Migrate off a source, and pick the source. Tsumiru gathers every series you have on it. The picker can sort sources, Show obsolete only to find dead extensions, and select all at once. This is the way to clear a dying source in one pass.

Choose the target source ​

On the Select sources screen, move the sources you want to search from Available into Selected. The shortcuts Select pinned, Select enabled, Select all, and Select none speed this up. Tsumiru searches these sources, in the order you pick them, for a match to each series. Tap Continue.

Two helpers narrow the results: Extra search query appends text to every title before searching, and Hide entries with no match and Hide entries without new chapters trim the list to what's worth moving.

Review the matches ​

The Migrate list shows each series next to the match Tsumiru found, including its Latest chapter. Where nothing matched, it reads No match found — tap that entry to Search manually, or Skip it.

Run the whole list from the toolbar's Migrate or Copy actions, or handle one entry at a time from its menu with Migrate now and Copy now.

Copy vs migrate: Copy adds the new entry and keeps the original in your library. Migrate replaces the original with the new entry. Copy first if you want to check the new source before dropping the old one.

No undo

Migrate removes the original entry when it finishes, and it can't be reversed. Double-check you picked the right target, or Copy instead and remove the old entry yourself once you're happy.

What carries over ​

The gear on the migration list opens Data to migrate, which decides what moves with each series:

  • Migrate Chapters (on): your read status, last-read page, and bookmarks, matched to the chapters on the new source.
  • Migrate Categories (on): the new entry joins the old one's categories.
  • Migrate Tracking (off): re-point your tracker links (AniList, MyAnimeList, …) at the new entry.
  • Reader settings (on): the series' per-series reader overrides.
  • Keep-offline rule (on): the series' offline download rule.
  • Migrate Downloads (off): the downloaded chapter files themselves. Left off by default, since those came from the old source — queue fresh downloads on the new entry instead.

A few things to know about matching:

  • Reading progress is matched chapter by chapter, by number first and then by name. When two sources number their chapters differently, some read statuses may not find a match. Nothing is ever marked unread; matches are only marked read.
  • Categories are added to the new entry. Nothing is removed from the old one.
  • If your server sign-in expires mid-run, migration pauses (Paused — sign in again to continue) and picks up where it left off once you sign back in.