How to open a JSON file online
Three steps, a few seconds, no software.
Open your .LNG file
Drop it on the box, choose it from your device, or paste the data straight in.
View the structure
Your .LNG 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 .LNG file?
The most common data format on the web.
An LNG file is a language (localization) resource that stores one language's worth of a program's interface text: menu labels, dialog buttons, messages. Most are plain text and open in any text editor. They belong to a specific application and do nothing outside it.
Programs that open .LNG files
| Full name | Language Definition File |
|---|---|
| Developer | Various application vendors (no single owner — a per-app convention) |
| First released | Long-standing per-application convention (1990s onward) for shipping UI translations |
| Category | Text & Code |
| MIME type | text/plain |
Related viewers
Every viewer is free to use.
Frequently asked questions
Is my .LNG file uploaded anywhere?
No. The file is opened directly from the copy you pick.
My .LNG 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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