Modern MTG Arena no longer writes your collection to its log file, so it can't be read automatically. Use our small exporter to read your collection straight from the running game, then import the file it makes. About 30 seconds each time you want to refresh.

1. 1. Download the exporter and save it anywhere.
   ⬇ Download exporter (.py)
   Requires Python 3 and, once, pip install pymem requests (Windows).
2. 2. Open MTG Arena and go to the Decks or Collection screen (leave the game running).
3. 3. Run the exporter — double-click it, or in a terminal: python arena_collection_exporter.py It writes mtga_collection.txt next to the script.
4. 4. Import that file here:
   ⬆ Import mtga_collection.txt

The exporter only reads your own collection from the game's memory and writes a local text file — nothing leaves your PC except the file you choose to import.

For sleeved cards, borderless prints, or bulk-entering a known list.