lookup> .slim

.SLIM·File Extension

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

Data & Texttext/slim

Quick facts

Extension.slim

File typeSLIM Data & Text

MIME typetext/slim

CategoryData & Text

Charset—

Compressible—

What is .slim

What is a .slim file?

A .slim file is a SLIM 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 text/slim. When serving .slim over HTTP, set the Content-Type header as shown in Developer info below.

Related entities: it maps to text/slim and is used by Slim among others — and is delivered over HTTP via the Content-Type header.

How to open .slim files

Use VS Code or Notepad++ to open and edit .slim 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: text/slim

Common software that reads/writes .slim:

VS CodeNotepad++Sublime Textjq

Relation chain

.slimextension of

format

SLIM Data & Textserved as

mime type

text/slimsent via header

http header

Related extensions

Related MIME types

Related programming languages

Slim

.slim

Common uses

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

How to edit .slim 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 .slim files

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

Frequently asked questions

What programs can open .slim 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 .slim file?

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

What is the relationship between .slim and the text/slim MIME type?

text/slim is the media type identifier used for .slim files during network transfer (for example in the HTTP Content-Type header).

Sources & standards

Updated 2026-08-18

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