HEJ2 Image — A .hej2 file is a HEJ2 Image. It is a raster or vector image format used for photos, web assets and design work.
Quick facts
What is .hej2
A .hej2 file is a HEJ2 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/hej2k. When serving .hej2 over HTTP, set the Content-Type header as shown in Developer info below.
Related entities: it maps to image/hej2k — and is delivered over HTTP via the Content-Type header.
How to open .hej2 files
Developer info
When served over HTTP, responses should set the following header:
Content-Type: image/hej2k
Common software that reads/writes .hej2:
Relation chain
Related extensions
Related MIME types
Common uses
How to edit .hej2 files
How to create .hej2 files
Frequently asked questions
Common options include Photoshop, GIMP, Paint. You can also open many of these files with built-in viewers or a browser.
Create a new file in any text editor or the app that owns the format and save it with the .hej2 extension.
image/hej2k is the media type identifier used for .hej2 files during network transfer (for example in the HTTP Content-Type header).
Sources & standards
Updated 2026-08-18
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