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.GRE·File Extension

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

Data & Textapplication/vnd.geometry-explorer

Quick facts

Extension.gre

File typeGRE Data & Text

MIME typeapplication/vnd.geometry-explorer

CategoryData & Text

Charset—

Compressible—

What is .gre

What is a .gre file?

A .gre file is a GRE 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.geometry-explorer. When serving .gre over HTTP, set the Content-Type header as shown in Developer info below.

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

How to open .gre files

Use VS Code or Notepad++ to open and edit .gre 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.geometry-explorer

Common software that reads/writes .gre:

VS CodeNotepad++Sublime Textjq

Relation chain

.greextension of

format

GRE Data & Textserved as

mime type

application/vnd.geometry-explorersent via header

http header

Related extensions

Related MIME types

application/vnd.geometry-explorer

.gex .gre

Common uses

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

How to edit .gre 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 .gre files

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

Frequently asked questions

What programs can open .gre 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 .gre file?

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

What is the relationship between .gre and the application/vnd.geometry-explorer MIME type?

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

Sources & standards

Updated 2026-09-13

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