There's a C# CLI app in the repo: https://github.com/j-brooke/FracturedJson/blob/main/Fracture...

  Output is to standard out, or a file specified by the --outfile switch.  Input is from either standard in, or from a file if using the --file switch

It looks like both the JavaScript version and the new Python C# wrapper have equivalent CLI tools as well.

RCL (https://github.com/ruuda/rcl) pretty-prints its output by default. Pipe to `rcl e` to pretty-print RCL (which has slightly lighter key-value syntax, good if you only want to inspect it), while `rcl je` produces json output.

It doesn’t align tables like FracturedJson, but it does format values on a single line where possible. The pretty printer is based on the classic A Prettier Printer by Philip Wadler; the algorithm is quite elegant. Any value will be formatted wide if it fits the target width, otherwise tall.

I don't know, but you can always use <() process substitution to create a temp file.

You can (usually) specify the input file name as “-“ (single hyphen) to read from stdin

this would be amazing to be chained with jq, that was my first thought as well.