AttributesToJSON 2025.10.9.21¶

Bundle¶

org.apache.nifi | nifi-standard-nar

Description¶

Generates a JSON representation of the input FlowFile Attributes. The resulting JSON can be written to either a new Attribute ‘JSONAttributes’ or written to the FlowFile as content. Attributes which contain nested JSON objects can either be handled as JSON or as escaped JSON depending on the strategy chosen.

Tags¶

attributes, flowfile, json

Input Requirement¶

REQUIRED

Supports Sensitive Dynamic Properties¶

false

Properties¶

Property	Description
Attributes List	Comma separated list of attributes to be included in the resulting JSON. If this value is left empty then all existing Attributes will be included. This list of attributes is case sensitive. If an attribute specified in the list is not found it will be emitted to the resulting JSON with an empty string or NULL value.
Destination	Control if JSON value is written as a new flowfile attribute ‘JSONAttributes’ or written in the flowfile content. Writing to flowfile content will overwrite any existing flowfile content.
Include Core Attributes	Determines if the FlowFile org.apache.nifi.flowfile.attributes. CoreAttributes which are contained in every FlowFile should be included in the final JSON value generated.
JSON Handling Strategy	Strategy to use for handling attributes which contain nested JSON.
Null Value	If true a non existing selected attribute will be NULL in the resulting JSON. If false an empty string will be placed in the JSON
Pretty Print	Apply pretty print formatting to the output.
attributes-to-json-regex	Regular expression that will be evaluated against the flow file attributes to select the matching attributes. This property can be used in combination with the attributes list property.

Relationships¶

Name	Description
failure	Failed to convert attributes to JSON
success	Successfully converted attributes to JSON

Writes attributes¶

Name	Description
JSONAttributes	JSON representation of Attributes