Native value formatters


This feature is not available in the Apple AppStore version due to sandboxing restrictions.

Native value formatters are scripts or executables developed in different programming languages which allow to display in readable form the key values of various formats inside the value editor. You can easily implement any formatter for your own purposes as well.


Advantages: - Plugin can be developed by any software engineer (Java/C++/C#/Python/PHP/Node.js etc) - Plugin can be easily debugged

How to implement native value formatter

  1. Create directory with meaningful name. Name of the directory will be used as formatter name.
  2. Implement script or executable which meets protocol described below.
  3. Add file usage.json with usage shell command
    For example for python script it will be: ['python', '']
  4. Test your formatter in!


Formatter info:

CMD: <executable> info

STDOUT (json):

    "version": "1.0.0",
    "description": "Formatter description",
    "read-only": true

If read-only property is absent - true is used as default value for this property. If read-only property is false - formatter will be showed in Add New Key and Add Row dialogs.

Decode binary data:

CMD: <executable> decode

STDIN: <binary-data-encoded-with-base64>

STDOUT (json):

    “output”: “<decoded data for human-friendly edit>”,
    “read-only”: “false”,    
    “format”: “plain_text” // or “json”

Encode string-representation

Required only for formatters which return “read-only”: true

CMD: <executable> encode

STDIN : <edited-string-representation-encoded-with-base64>

STDOUT (json):

    “output”: “<binary-data-encoded-with-base64>”,    

Error handling:

If formatter cannot decode/encode value error response should be returned:

OUT (json):

    “error”: “Invalid CBOR data”,    


To install the formatter create formatters/ directory inside of .rdm/ settings directory which is by default located inside of your home directory or by the path you specify as --settings-dir option when you run Then copy formatter's directory into .rdm/formatters/. Or just clone the repository with examples into .rdm/ like shown below.

cd ~/.rdm/
git clone formatters

How to verify installation

To verify that the formatter is installed go to Settings and check the table titled "Custom Value View Formatters" for desired formatter presence.

How to use

Click on the key to open the value editor and choose the appropriate formatter from the "View as:" drop-down menu.

Thirdparty formatters

You can find more formatters on Github.