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.FSC·File Extension

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

Data & Textapplication/vnd.fsc.weblaunch

Quick facts

Extension.fsc

File typeFSC Data & Text

MIME typeapplication/vnd.fsc.weblaunch

CategoryData & Text

Charset—

Compressible—

What is .fsc

What is a .fsc file?

A .fsc file is a FSC 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.fsc.weblaunch. When serving .fsc over HTTP, set the Content-Type header as shown in Developer info below.

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

How to open .fsc files

Use VS Code or Notepad++ to open and edit .fsc 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.fsc.weblaunch

Common software that reads/writes .fsc:

VS CodeNotepad++Sublime Textjq

Relation chain

.fscextension of

format

FSC Data & Textserved as

mime type

application/vnd.fsc.weblaunchsent via header

http header

Related extensions

Related MIME types

application/vnd.fsc.weblaunch

.fsc

Common uses

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

How to edit .fsc 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 .fsc files

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

Frequently asked questions

What programs can open .fsc 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 .fsc file?

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

What is the relationship between .fsc and the application/vnd.fsc.weblaunch MIME type?

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

Sources & standards

Updated 2026-09-13

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