How to open a JSON file online
Three steps, a few seconds, no software.
Open your .FTL file
Drop it on the box, choose it from your device, or paste the data straight in.
View the structure
Your .FTL 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 .FTL file?
The most common data format on the web.
An FTL file is an Apache FreeMarker template, a plain text file that mixes static content (HTML, XML, etc.) with directives and expressions that a Java application processes to produce output. Open it in VS Code or IntelliJ IDEA to edit it. To render it you need a Java project with the FreeMarker library.
Programs that open .FTL files
| Full name | FreeMarker Template Language File |
|---|---|
| Developer | Attila Szegedi (original); The FreeMarker Project; Apache Software Foundation (since 2015) |
| First released | circa 2002 (FreeMarker first release) |
| Category | Text & Code |
| MIME type | text/plain |
Related viewers
Every viewer is free to use.
Frequently asked questions
Is my .FTL file uploaded anywhere?
No. The file is opened directly from the copy you pick.
My .FTL 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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