STW Data & Text — A .stw file is a STW Data & Text. It is a text-based data format widely used for configuration files, data interchange and API payloads.
Quick facts
What is .stw
A .stw file is a STW Data & Text. It is a text-based data format widely used for configuration files, data interchange and API payloads.
In the mime-db registry it maps to application/vnd.sun.xml.writer.template. When serving .stw over HTTP, set the Content-Type header as shown in Developer info below.
Related entities: it maps to application/vnd.sun.xml.writer.template — and is delivered over HTTP via the Content-Type header.
How to open .stw files
Developer info
When served over HTTP, responses should set the following header:
Content-Type: application/vnd.sun.xml.writer.template
Common software that reads/writes .stw:
Relation chain
Related extensions
Related MIME types
Common uses
How to edit .stw files
How to create .stw files
Frequently asked questions
Common options include VS Code, Notepad++, Sublime Text. You can also open many of these files with built-in viewers or a browser.
Create a new file in any text editor or the app that owns the format and save it with the .stw extension.
application/vnd.sun.xml.writer.template is the media type identifier used for .stw files during network transfer (for example in the HTTP Content-Type header).
Sources & standards
Updated 2026-08-18
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