The WIP specification for the dat.json meta format
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The WIP specification for the dat.json meta format.

  "title": "My paper library",
  "author": "Julian Gruber <>",
  "url": "dat://c75ffb161a9965e47323ba9b76aa11f649504b0d2d5d062dcb3438d5aeadc187"


Add a dat.json with any of those keys - all are optional - to the root of a dat archive to help tooling work with your archive more nicely:


A short but descriptive human friendly title.


A one- or two-line description of the archive.


Url of the Dat archive. This will usually be the dat:// then the archive key.


The archive's author - the packager, not necessarily the data's author as well. Can be either an object with any of those keys:

  "name": "Julian Gruber",
  "email": "",
  "web": ""

or a string with at least the name and any of the segments email and web:


like for example:

  • "Julian Gruber"
  • "Julian Gruber <>"
  • "Julian Gruber ("
  • "Julian Gruber <> ("


  • Dat-Desktop will use .title to display a nice archive name instead of just its key