A fast, lightweight JSON formatter for *nix systems. Forked from bsouther/jsonf.

How is GNU yes so fast? helped making it faster :)

Sometimes I have to work with large JSON files (> 1GB). These are kind of hard to deal with if they're not formatted (i.e. a single line). The fastest JSON formatter I found performed at around 15 MB/s.

jsnfmt is roughly ten times faster on my system:

ψ jsnfmt large.json | pv > /dev/null
1032MiB 0:00:04 [ 158MiB/s] [     <=>                               ]

jsnfmt always writes to stdout. It can read input from stdin

echo '{"foo": [1,2,3], "bar": "baz"}' | jsnfmt

or from a file

jsnfmt ~/some.json > formatted.json

It does not have any command line switches.

Prerequisites:

• C compiler (tested with clang)
• clang-format (if you wish to contribute)
• make

After installing these, you can simply run make.

See the LICENSE file.