lookup> .sus

.SUS·File Extension

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

Data & Textapplication/vnd.sus-calendar

Quick facts

Extension.sus

File typeSUS Data & Text

MIME typeapplication/vnd.sus-calendar

CategoryData & Text

Charset—

Compressible—

What is .sus

What is a .sus file?

A .sus file is a SUS 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.sus-calendar. When serving .sus over HTTP, set the Content-Type header as shown in Developer info below.

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

How to open .sus files

Use VS Code or Notepad++ to open and edit .sus 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.sus-calendar

Common software that reads/writes .sus:

VS CodeNotepad++Sublime Textjq

Relation chain

.susextension of

format

SUS Data & Textserved as

mime type

application/vnd.sus-calendarsent via header

http header

Related extensions

Related MIME types

application/vnd.sus-calendar

.sus .susp

Common uses

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

How to edit .sus 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 .sus files

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

Frequently asked questions

What programs can open .sus 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 .sus file?

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

What is the relationship between .sus and the application/vnd.sus-calendar MIME type?

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

Sources & standards

Updated 2026-09-13

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