aeson-pretty

A JSON pretty-printing library compatible with aeson as well as a command-line tool to improve readability of streams of JSON data.

The library provides the function "encodePretty". It is a drop-in replacement for aeson's "encode" function, producing JSON-ByteStrings for human readers.

The command-line tool reads JSON from stdin and writes prettified JSON to stdout. It also offers a complementary "compact"-mode, essentially the opposite of pretty-printing.