package jsonm

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Non-blocking streaming JSON codec for OCaml






Jsonm — Non-blocking streaming JSON codec for OCaml


Jsonm is a non-blocking streaming codec to decode and encode the JSON data format. It can process JSON text without blocking on IO and without a complete in-memory representation of the data.

The alternative "uncut" codec also processes whitespace and (non-standard) JSON with JavaScript comments.

Jsonm is made of a single module and depends on Uutf. It is distributed under the ISC license.

Home page:
Contact: Daniel Bünzli <daniel.buenzl>


Jsonm can be installed with opam:

opam install jsonm

If you don't use opam consult the opam file for build instructions.


The documentation and API reference is automatically generated by ocamldoc from the interfaces. It can be consulted online and there is a generated version in the doc directory of the distribution.

Sample programs

If you installed jsonm with opam, it installed the jsontrip binary which, among other things, reads JSON on stdin and rewrites it on stdout; invoke with -help for more information. Sample code is located in the directory opam config var jsonm:doc.

In the distribution sample programs are located in the test directory of the distribution. They can be built with:

ocamlbuild -use-ocamlfind test/tests.otarget

The resulting binaries are in _build/test.