(registered 2026-08-06, last updated 2026-08-06)

Media type name: application

Media subtype name: vnd.jupyter

Required parameters: N/A

Optional parameters: N/A

Encoding considerations: binary

Jupyter notebooks are json based

Security considerations: Jupyter Notebooks contain executable code, but requires bespoke software (kernels) to run. It is not an executable as such, but contains source code. Along side code, any kind of text content can be added to a note book.

Interoperability considerations: N/A

Published specification: https://docs.jupyter.org/en/latest/reference/mimetype.html

Applications which use this media: 

Jupyter Notebooks is an open format based on json, it is in use in the Jupyter project: 

https://jupyter.org/

Fragment identifier considerations: N/A

Restrictions on usage: N/A

Additional information:

1. Deprecated alias names for this type: N/A
2. Magic number(s): N/A
3. File extension(s): .ipynb
4. Macintosh file type code: N/A
5. Object Identifiers: N/A

Person to contact for further information:

1. Name: Jupyter Team
2. Email: projectjupyter&gmail.com

Intended usage: COMMON

Author/Change controller:

Jupyter Team
https://jupyter.org/governance/people
projectjupyter&gmail.com