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File Formats

Serialization

JSON

• yojson: an optimized parsing and printing library for the JSON format.
  • ppx_yojson_conv: A solid ppx_deriving solution for automatically deriving JSON serializers from types. Other solutions are not recommended.
  • yojson_ppx: Write yojson-oriented code more easily and concisely.
• jsonm: non-blocking streaming JSON codec for OCaml.
• ezjsonm: library to simplify usage of jsonm.
• jsonxy: RFC-compliant JSON library. docs.
• data-encoding: A library for JSON and binary encoding of values.

TOML

• otoml: TOML parsing, manipulation, and pretty-printing library for OCaml (fully 1.0.0-compliant)
• To.ml: an OCaml library for reading and writing TOML files

XML

• Markup: streaming, lazy parser for XML and HTML5.
• xmlm: a streaming codec to decode and encode the XML data format.
• easyxmlm: easy to use wrapper over xmlm.

YAML

• ocaml-yaml: Parse and generate yaml 1.1 files.

Others

• sexplib: a S-expression parser and printer
• biniou: extensible binary data format, like JSON but faster.
• ocaml-protoc pure OCaml implementation of Protobuf with binary, Yojson and BuckleScript JSON support.
• bin_prot efficient, type-safe binary protocol specific to OCaml.
• camlon: configuration and serialization format similar to JSON but with an OCaml feel.
• ocaml-decoders: Elm-inspired decoders for OCaml
• zipc: In-memory pure OCaml zip library.

Data Science Files

• npy: read and write the numpy file format.
• hdf5-OCaml: OCaml implementation of hdf5 reader/writer. Mostly used in data science.

Miscellaneous

• camlPDF: OCaml library for reading, writing and modifying PDF files.
• bencode: Bencode (.torrent file format) reader/writer.
• Decompress: a pure OCaml implementation of Zlib.
• Easy-xslx: read Microsoft Office Open XML files.
• hevea: library to convert LaTex to html. Used for the OCaml manual
• ocaml-pandoc: Interface to pandoc, a universal markup converter.