Trello export inspector.What is actually in the file.
Before you migrate, archive, or hand a board to someone else, see what a Trello JSON export contains and what it quietly leaves out: truncated comment history, files that are only links, archived work, and Power-Up data.
Runs in your browser. The file is never uploaded.
How to get the JSON file from Trello
- Open the board in Trello and click the ⋯ menu at the top right.
- Choose Print, export, and share.
- Choose Export as JSON. The browser downloads or opens a single .json file. If it opens as text, save the page with a .json name.
- Drop that file here.
Works on Trello's free plan. The JSON export includes cards, lists, labels, members, checklists, custom fields, and up to 1,000 recent actions, which is where comments come from.
What a Trello JSON export does and does not contain
The export is a snapshot of one board: its lists, cards, labels, members, checklists, custom field definitions and values, attachment records, and a slice of the activity log. It is the most complete export Trello offers, and it is available on every plan, but three things routinely surprise people.
Comments come from the activity log, and the log is capped
Trello writes comments into the board's actions and exports at most the 1,000 most recent actions. On a board with years of history the older comments are simply not in the file. The inspector shows the raw action count so you can tell when the cap has been hit.
Uploaded files are URLs, not files
Every attachment appears with its name and a link. For a web link that is the whole story. For a file someone uploaded, the link points at Trello's storage and needs a Trello login. Copying the actual files requires either Trello's workspace export with raw attachments or an importer that fetches them with your authorisation.
Archived work is still there
Archived lists and cards are exported alongside live ones with a closed flag. Most spreadsheets and imports should leave them out, which is why the converter excludes them unless you ask.
Trello export questions
Does Trello let me export to Excel or CSV for free?
No. Trello’s CSV export is part of the paid Premium plan. The JSON export is available on every plan, including Free, and contains more than the CSV does.
This tool reads that JSON export in your browser and writes Excel, CSV, or Markdown from it.
Is my Trello data uploaded anywhere?
No. The file is read by JavaScript running in your browser tab and never leaves your device. There is no server behind this page; you can disconnect from the internet after it loads and it still works.
Nothing is stored either. Reload the page and the board is gone.
Are attachments included?
Attachment names and links are included. The files themselves are not in a Trello JSON export: uploaded files appear as URLs that need a Trello login to open.
Kanera’s Trello importer can copy the uploaded files across when you connect your Trello account during the import.
Why are some comments missing?
Trello exports at most 1,000 recent actions per board, and comments are stored as actions. On a busy board the older comments are not in the file. The Inspect view shows the raw action count so you can tell when this has happened.
Can I convert several boards at once?
One board per file, because Trello exports one board per file. Drop the next file when the first download finishes; the tool resets in a click.
What does the Excel workbook contain?
Sheets for Cards, Checklists, Comments, Attachments, Lists, Labels, Members, and Custom fields. The Cards sheet has one column per Trello custom field, and dates are real Excel dates so they sort and filter.
Done converting?
Import the board itself.
Kanera imports the same JSON file with lists, labels, custom fields, members, checklists, and comments intact, and can copy the uploaded files across too. You review every mapping before anything is created.
No card required, 30-day Pro trial, free plan available after it