lookup> .aso

.ASO·File Extension

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

Data & Textapplication/vnd.accpac.simply.aso

Quick facts

Extension.aso

File typeASO Data & Text

MIME typeapplication/vnd.accpac.simply.aso

CategoryData & Text

Charset—

Compressible—

What is .aso

What is a .aso file?

A .aso file is a ASO 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.accpac.simply.aso. When serving .aso over HTTP, set the Content-Type header as shown in Developer info below.

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

How to open .aso files

Use VS Code or Notepad++ to open and edit .aso 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.accpac.simply.aso

Common software that reads/writes .aso:

VS CodeNotepad++Sublime Textjq

Relation chain

.asoextension of

format

ASO Data & Textserved as

mime type

application/vnd.accpac.simply.asosent via header

http header

Related extensions

Related MIME types

application/vnd.accpac.simply.aso

.aso

Common uses

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

How to edit .aso 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 .aso files

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

Frequently asked questions

What programs can open .aso 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 .aso file?

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

What is the relationship between .aso and the application/vnd.accpac.simply.aso MIME type?

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

Sources & standards

Updated 2026-09-13

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