Most commands producing output supports the --output-format parameter. It accepts the following values:

text:Text format (default). Structured data is rendered as a table.
json:JSON (single line).
json-pretty:JSON (multiple lines, nicely formatted).

Also, the following environment variables can modify output behavior:

PROXMOX_OUTPUT_FORMAT
Defines the default output format.
PROXMOX_OUTPUT_NO_BORDER
If set (to any value), do not render table borders.
PROXMOX_OUTPUT_NO_HEADER
If set (to any value), do not render table headers.

Note

The text format is designed to be human readable, and not meant to be parsed by automation tools. Please use the json format if you need to process the output.