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.ZIR·File Extension

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

Data & Textapplication/vnd.zul

Quick facts

Extension.zir

File typeZIR Data & Text

MIME typeapplication/vnd.zul

CategoryData & Text

Charset—

Compressible—

What is .zir

What is a .zir file?

A .zir file is a ZIR 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.zul. When serving .zir over HTTP, set the Content-Type header as shown in Developer info below.

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

How to open .zir files

Use VS Code or Notepad++ to open and edit .zir 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.zul

Common software that reads/writes .zir:

VS CodeNotepad++Sublime Textjq

Relation chain

.zirextension of

format

ZIR Data & Textserved as

mime type

application/vnd.zulsent via header

http header

Related extensions

Related MIME types

Common uses

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

How to edit .zir 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 .zir files

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

Frequently asked questions

What programs can open .zir 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 .zir file?

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

What is the relationship between .zir and the application/vnd.zul MIME type?

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

Sources & standards

Updated 2026-09-13

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