Accidentally Created Hundreds of Cards in Anki: How to Reverse Cards in Bulk?

Abstract: Bulk reverse accidentally swapped Anki cards using the Reverse Fields add-on to fix data entry errors efficiently.

Created: 2026-09-27 by
You can reverse hundreds of Anki cards in bulk by using the "Reverse Fields" add-on, which automatically swaps front and back content for selected notes. This tool eliminates manual editing errors and saves significant time when correcting accidental data entry mistakes.

Installing the Reverse Fields Add-on

The most efficient way to fix reversed cards is through Anki’s built-in add-on system. Before you begin, ensure you have a backup of your deck. You can create one by going to File > Export and selecting "All Current Notes." This safety step ensures that if anything goes wrong during the bulk operation, you can restore your original data.

To install the necessary tool, open Anki and navigate to Tools > Add-ons. Click the Get Add-ons... button located at the bottom of the window. In the search field, enter the code 5150618993, which is the specific identifier for the Reverse Fields add-on. Once you click OK, Anki will download and install the extension. You will need to restart the application for the changes to take effect.

Selecting the Affected Cards

After restarting Anki, you must identify exactly which cards need reversing. Open the browser by clicking Browse in the main toolbar. Use the search bar to filter your notes. If all cards in a specific deck are reversed, you can search by deck:YourDeckName. If only certain tags or fields are affected, use more specific queries like tag:reversed or check the field contents directly.

Once your search results display the incorrect cards, select them all. You can do this by clicking the first card, holding Shift, and clicking the last card to highlight the entire range. Alternatively, press Ctrl+A (or Cmd+A on Mac) to select every note in the current view. It is crucial to verify that you have selected only the notes with swapped fields before proceeding.

Executing the Bulk Reversal

With the correct notes selected, look for the Add-ons menu item in the top toolbar. Click it and locate Reverse Fields in the dropdown list. Clicking this option will trigger the add-on to swap the content of the first field with the second field for every selected note. This process happens almost instantly, regardless of whether you have ten cards or ten thousand.

After the operation completes, close the browser and return to your main deck view. Perform a quick review session to verify that the front and back information now appear correctly. If you notice any anomalies, you can undo the action immediately using Edit > Undo or by restoring from your earlier export backup.

Preventing Future Data Entry Errors

To avoid accidentally creating reversed cards in the future, consider adjusting your note type settings. Many users encounter this issue because they manually type the front and back separately rather than using a single field with a separator. Configure your note types to use a single input field where you type both sides, separated by a tab or custom delimiter. The note template can then split these into front and back automatically.

Another strategy is to use templates that enforce field order. By locking the structure of your notes, you reduce the likelihood of human error during data entry. Additionally, regularly reviewing your deck statistics can help you spot unusual patterns early. If you see a sudden spike in new cards added to a specific deck, investigate immediately to ensure no bulk import errors occurred.

Alternative Manual Methods

If you prefer not to install add-ons, you can manually reverse cards, though this is tedious for large volumes. Open individual notes in the editor and cut the text from the front field, then paste it into the back field, and vice versa. This method is prone to formatting inconsistencies and is not recommended for more than a few dozen cards.

For those comfortable with CSV exports, you can export the deck as a CSV file, open it in a spreadsheet program like Excel, and use formulas to swap columns. After swapping, re-import the file into Anki. Note that this method requires careful handling of HTML formatting and separators to prevent data corruption. For detailed guidance on managing spreadsheet data, you might find Populating One Sheet by Comparing Values from Two Excel Sheets helpful for understanding data manipulation techniques.

Optimizing Your Study Workflow

Correcting reversed cards is just one part of maintaining a healthy study system. Regularly cleaning up duplicate notes and merging similar concepts can improve your retention rates. Anki’s algorithm works best when each card tests a distinct piece of information. By keeping your decks organized and free of errors, you ensure that your study sessions remain efficient and focused.

Consider using the "Find Duplicates" feature under Tools to identify redundant cards. Merging these duplicates reduces cognitive load and prevents wasted review time. Furthermore, exploring different note types can enhance how you process information. Some users find that cloze deletion notes are more effective for language learning, while standard front-back cards work better for factual recall.

Frequently Asked Questions

Will reversing fields delete my existing reviews?

No, reversing fields does not delete your review history or due dates. The add-on only swaps the text content within the fields. Your scheduling data remains intact, so you will continue seeing cards based on their previous interval status. However, the content you see on the screen will be flipped.

Can I reverse fields for only specific tags?

Yes, you can target specific subsets of cards. Before running the Reverse Fields add-on, use the Browser to search for tag:yourTag. Select only the notes associated with that tag, then execute the reversal. This allows you to fix localized errors without affecting the rest of your deck.

What if my cards have more than two fields?

The Reverse Fields add-on typically swaps the first and second fields. If your note type has additional fields, they remain unchanged. Ensure your note type is structured so that the front and back information occupy the first two fields. If your layout is complex, you may need to adjust the note type template first.

Is there a risk of losing formatting when reversing?

In most cases, HTML formatting such as bolding or images is preserved because the add-on moves the raw field content. However, if your front and back fields have different CSS styling classes applied, the visual appearance might change slightly. Always preview the cards after reversal to confirm that formatting looks correct.

How do I know if an add-on is safe to install?

Anki’s add-on repository is generally secure, but always check the description and user reviews. Look for add-ons with high ratings and recent updates. The Reverse Fields add-on is widely used and trusted by the community. You can also inspect the add-on’s source code if you are technically inclined to ensure it performs only the expected actions.

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