trellotrello-cards
Upon editing a Trello card description, Trello selects the whole text, which makes it pretty easy to accidentally delete the whole description and save it.
I have accidentally done this a few times, but unlike when editing the title of the card, Trello doesn't seem to log card description updates. How can I revert such an accidental deletion of potentially important infos?
In the top right select Show menu
Then click More
Then click Archived Items
You then click the Send to Board button on the item and it will be reinstated to your board.
They are logged in the JSON export of the card.
The current description under the desc key, and the previous revisions of the card are under the actions key, look for old -> desc.
Best Answer
Open the card and add ".json" to the end of the URL
You're now facing the "raw data" of everything Trello knows about this card. It's JSON-formatted data and it's pretty hard to read for a human, so it might come handy to either pretty-print it, use a JSON viewer extension, or use Firefox that prettify JSON by default (like I do)
The description edition should be under the "action" key. Just scroll down to it and locate the action containing the whole deleted text
You can now copy-paste it back into the card description. Accident undone!