How to open a JSON file online
Three steps, a few seconds, no software.
Open your .TDF file
Drop it on the box, choose it from your device, or paste the data straight in.
View the structure
Your .TDF file opens as a tidy, foldable tree, with the exact line of any error pointed out.
Search, copy or download
Search keys and values, copy any path or value, switch to a table, or download a clean copy.
What is a .TDF file?
The most common data format on the web.
A TDF file is a plain text data file used by the 1997 real-time strategy game Total Annihilation, storing terrain features, faction data, sounds, and UI definitions. Open it with any text editor; Notepad or VS Code work fine. TDF files carry no executable content and pose no security risk.
Programs that open .TDF files
| Full name | Total Annihilation Features Data File |
|---|---|
| Developer | Cavedog Entertainment (now community-maintained) |
| First released | 1997 (Total Annihilation release) |
| Category | Text & Code |
| MIME type | text/plain |
Related viewers
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Frequently asked questions
Is my .TDF file uploaded anywhere?
No. The file is opened directly from the copy you pick.
My .TDF file is invalid. Can you fix it?
We show the exact line and column of the first error. For common problems like comments, trailing commas, single quotes or Python-style True/False/None, click Try to repair and download the fixed file.
How large can the file be?
Up to 50 MB. The tree only builds the branches you open, so even multi-megabyte files stay responsive.
What is JSONPath?
A path like $.orders[3].customer.email that points to one value inside the data. Click any node to see its path and copy it for code, jq or your API docs.
Can I see my data as a table?
Yes. Any array of objects can be shown in the Table view and downloaded as CSV.
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