Best for

• Those who have the opened product
• Those who are comfortable using a spreadsheet
• Those who enjoy typing in card names one at a time

Steps

1. (Skip this step if you’ve already submitted before. Just use a copy of a previous CSV.) To ensure you have a Deckbox-compatible CSV, either download a CSV export of your Deckbox inventory, or download one of the CSVs in this resource. Clear all the contents except the header row.
2. Ensure that only these columns are present, and in the following order: Count, Name, Foil, Card Number, Edition. Please do not include Language or Condition, as these will be set by the end user.
3. Fill in all the information for each card. You can skip the card number except when the card has more than one artwork variation in that edition, such as with basic lands.
   • If a card is foil, enter foil into that column; otherwise, leave that column blank.
   • If you aren’t sure on Deckbox’s naming convention for a given edition, you can find it on the Editions page.
4. Ensure you are following this guide’s best practices (see below).

Best for

• Those who want to keep their product sealed
• Those who can verify via other methods, such as an unboxing video
• Those who prefer following a series of process steps as opposed to entering cards individually

Prerequisites

You must either

• feel comfortable backing up, deleting, and reinstating your inventory; or
• have access to an additional dummy account on Deckbox (this is allowed if you obtain permission from Deckbox staff, as long as you never use the dummy account for trading/selling; see rule 1.1)

Steps

TL;DR — This list of 9 steps may feel much more complicated than the “by hand” approach, but once you've done it a couple times, it takes FAR less time than manual entry.

1. (Skip if you’re using a dummy account) Export your current inventory to CSV; save in a safe place. Go to Tools > Remove Everything to clear your online inventory.
2. Copy the decklist from any reputable source. (I know wikis have a bad rap, but I've found that MTG Wiki is generally pretty reliable.)
   • Note any important info, such as which cards are foil, alternate art face cards (which often have their own edition on Deckbox), any included oversized cards or tokens, etc. These details can be manually changed / entered later.
3. Paste the decklist into Add Cards > Add Card List.
4. Switch the default edition to the correct one, and click Import.
5. Important — Multiple edition precons: Many precons, like Challenger Decks and Intro Packs, include cards from multiple editions. Check your decklist source for which editions cards can come from (MTG Wiki often will list this info). If your precon has multiple editions, follow these steps:
   • Repeat steps 3–4 for each possible edition. (This will add duplicates to your inventory.)
   • In Search & Filter, add the No Edition Set filter and Apply.
   • Tick the topmost checkbox to select all cards on that page, then choose Card Actions > Remove Selected. Repeat until no more cards are displayed. Clear the filter.
   • If the total cards in inventory (you may have to refresh the page) is greater than the decklist, that means one or more cards was added from more than one valid edition. Sort by Name to see which ones. You’ll have to use an unboxing video to determine which version is actually included in the deck. If you do not plan to verify, please clear the edition completely from the card rather than choose one blindly.
6. The following steps can be completed in any order, depending on whether you prefer working within Deckbox or a spreadsheet:
   • Sort inventory by edition (E/#), then go to Tools > Export.
   • Perform all necessary manual changes on the cards, such as splitting basic lands into their correct artwork counts, setting the foil flag on face cards, adding cards not included in the decklist (such as oversized cards and tokens), etc.
7. Ensure that the exported CSV contains only these columns, and in the following order: Count, Name, Foil, Card Number, Edition. Please do not include Language or Condition, as these will be set by the end user.
8. Ensure you are following this guide’s best practices (see below).
9. Clear your online inventory. Re-import your original inventory from the CSV you exported in step 1.

• It is preferred that the CSV is sorted by edition and collector number, though doing so is not necessary, as it will not negatively affect import nor break compatibility with other CSVs.
• As an exception to the above, if the deck has a "face card" (such as a commander or the foil face cards of Intro/Planeswalker decks), it is preferred that this card is listed at the top of the CSV, directly below the header row.
• If a precon has multiple parts, such as the two separate decks of the Duel Deck series or the main deck and sideboard of Challenger Decks, it is preferred that you keep them separated in the CSV file with a blank line.
• If a card appears in more than one section (such as a playset being split between maindeck and sideboard), enter accurate counts for that card for each section. Deckbox will combine them.

I have an opened deck! I’ll just look at that.

Careful. If you don’t feel 100% confident that the opened deck you have is completely unaltered from when you first opened it, there’s no shame in that, but please don’t go with your gut or best guess and mark the file as verified. It would be much better to allow another user down the line to verify the CSV’s contents than to accidentally allow several dozen downloads of an inaccurate CSV.

No worries, I know for a fact that the contents have never been altered.

Cool. But you are not exempt from user error! Take your time and double check your entries. In particular, make sure any foil cards match the picture on Deckbox. They are sometimes alternate art promos (Intro Packs and Clash Packs both had these) that have their own special edition on Deckbox. Also double check the counts of each basic land artwork, comparing the picture on Deckbox to the one in your hand. It’s easy to get the counts of those mixed up.

I don’t have an unopened version of the deck. How can I verify it?

The best resource I’ve found are unboxing videos on YouTube. That said, many content creators assume the basic lands and tokens are of no interest to anyone, and either don’t show them at all or just skip through them in a clump. Those videos are useless. You’ll have to find videos where all the cards are actually displayed, even if just partially (enough that you can match the snippet of visible artwork to actual cards). You may have to slow down the video to 50% or even 25% speed. Make no assumptions! For instance, basic lands sometimes show up in weird orders, especially in older precons, so you need to actually track how many of each you see.