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.VSW·File Extension

VSW Data & Text — A .vsw file is a VSW Data & Text. It is a text-based data format widely used for configuration files, data interchange and API payloads.

Data & Textapplication/vnd.visio

Quick facts

Extension.vsw

File typeVSW Data & Text

MIME typeapplication/vnd.visio

CategoryData & Text

Charset—

Compressible—

What is .vsw

What is a .vsw file?

A .vsw file is a VSW 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.visio. When serving .vsw over HTTP, set the Content-Type header as shown in Developer info below.

Related entities: it maps to application/vnd.visio — and is delivered over HTTP via the Content-Type header.

How to open .vsw files

Use VS Code or Notepad++ to open and edit .vsw files.
Any text editor (Notepad, VS Code) can inspect the raw content as text.

Developer info

When served over HTTP, responses should set the following header:

Content-Type: application/vnd.visio

Common software that reads/writes .vsw:

VS CodeNotepad++Sublime Textjq

Relation chain

.vswextension of

format

VSW Data & Textserved as

mime type

application/vnd.visiosent via header

http header

Related extensions

Related MIME types

application/vnd.visio

.vsd .vst .vss

Common uses

Configuration files
Data interchange between systems
API request and response payloads
Logs and data exports

How to edit .vsw files

Open the file with VS Code, make your changes and save.
Most editors preserve the original formatting and encoding — avoid changing the charset.

How to create .vsw files

Create a new file and save it with the .vsw extension, or export this format from VS Code.

Frequently asked questions

What programs can open .vsw files?

Common options include VS Code, Notepad++, Sublime Text. You can also open many of these files with built-in viewers or a browser.

How do I create a .vsw file?

Create a new file in any text editor or the app that owns the format and save it with the .vsw extension.

What is the relationship between .vsw and the application/vnd.visio MIME type?

application/vnd.visio is the media type identifier used for .vsw files during network transfer (for example in the HTTP Content-Type header).

Sources & standards

Updated 2026-09-13

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