How to open a JSON file online
Three steps, a few seconds, no software.
Open your .DMD file
Drop it on the box, choose it from your device, or paste the data straight in.
View the structure
Your .DMD 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 .DMD file?
The most common data format on the web.
A DMD file is an Oracle SQL Developer Data Modeler design file, an XML document that anchors a database design project with entity-relationship diagrams, logical and relational models, and physical schemas. Open it with Oracle SQL Developer Data Modeler (free from oracle.com). The DMD file is only the entry point: the actual model data lives in a subfolder with the same name, and both must stay together.
Programs that open .DMD files
| Full name | Oracle SQL Developer Data Modeler Design File |
|---|---|
| Developer | Oracle Corporation |
| First released | Oracle SQL Developer Data Modeler 1.0 (circa 2007–2008) |
| Category | Text & Code |
| MIME type | application/xml |
| Signature | 3C 3F 78 6D 6C |
Related viewers
Every viewer is free to use.
Frequently asked questions
Is my .DMD file uploaded anywhere?
No. The file is opened directly from the copy you pick.
My .DMD 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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