What Is a .jng File? .jng Format, MIME & How to Open

Quick facts

Extension.jng

File typeJNG Image

MIME typeimage/x-jng

CategoryImage

Charset—

Compressible—

What is .jng

What is a .jng file?

A .jng file is a JNG Image. It is a raster or vector image format used for photos, web assets and design work.

In the mime-db registry it maps to image/x-jng. When serving .jng over HTTP, set the Content-Type header as shown in Developer info below.

Related entities: it maps to image/x-jng — and is delivered over HTTP via the Content-Type header.

How to open .jng files

Use Photoshop or GIMP to open and edit .jng 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: image/x-jng

Common software that reads/writes .jng:

PhotoshopGIMPPaintPreview

Relation chain

.jngextension of

format

JNG Imageserved as

mime type

image/x-jngsent via header

http header

Related extensions

Related MIME types

Common uses

Web graphics and photos
Design assets and icons
Print and photography

How to edit .jng files

Open the file with Photoshop, make your changes and save.
Most editors preserve the original formatting and encoding — avoid changing the charset.

How to create .jng files

Create a new file and save it with the .jng extension, or export this format from Photoshop.

Frequently asked questions

What programs can open .jng files?

Common options include Photoshop, GIMP, Paint. You can also open many of these files with built-in viewers or a browser.

How do I create a .jng file?

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

What is the relationship between .jng and the image/x-jng MIME type?

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

Sources & standards

Updated 2026-09-13

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