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any-json can be used to convert (almost) anything to and from JSON.

NPM version

Install from npm

npm install any-json -g



# Prints as JSON to standard out 
any-json package.json5
# Writes the contents from `package.json` to `package.json5` as JSON5 
any-json package.json package.json5
# Same as above (the `convert` command is default). 
any-json convert package.json5
any-json convert package.json package.json5


# Prints an JSON array containing an item for every JSON file in directory 
any-json combine *.json
# Combines A.json and B.json, writing the result to C.json 
any-json combine A.json B.json --out C.json
# Create a csv from a collection of flat YAML files 
any-json combine *.yaml --out=data.csv


# Creates a JSON file for each row in the CSV where the name is based on the `product_id` column 
any-json split products.csv prod-{product_id}.json

Formats and Data Safety


When only JSON features are used, conversion should not result in any data loss when using these formats.

  • cson
  • hjson
  • json
  • json5
  • yaml


Some loss of information may occur. Improved parsers/serializers could provide better compatibility, but implementation is provided as-is. Known issues are listed below the format.

  • ini
    • All numbers are converted to strings (the ini library would need to quote strings in order be recognize numbers)
    • In the unlikely case an object was not an array but has only has sequential, numeric members starting at zero it will be decoded as an array.
  • toml
    • Top-level array and date objects are not supported
      • It would be non-standard, but this could be worked around by wrapping the content in an object (then discarding the object when decoding).
  • xml


These formats are conceptually different and only work on a limited basis. With effort, conventions could be established to provide a more complete transfer but there will be some impedance.

Tabular formats:

  • csv
  • xls
  • xlsx


Command Line

usage: any-json [command] FILE [options] [OUT_FILE]

any-json can be used to convert (almost) anything to JSON.

This version supports:
    cson, csv, hjson, ini, json, json5, toml, yaml

This version has is beta support for:
    xls, xlsx

The beta formats should work, but since they are new,
  behavior may change in later releases in response to feedback
  without requiring a major version update.

    convert    convert between formats (default when none specified)
    combine    combine multiple documents
    split      spilts a document (containing an array) into multiple documents

    -?, --help              Prints this help and exits.
    --version               Prints version information and exits.
    --input-format=FORMAT   Specifies the format of the input (assumed by file
                            extension when not provided).
    --output-format=FORMAT  Specifies the format of the output (default: json or
                            assumed by file extension when available).

  combine (additional options):
    --out=OUT_FILE          The output file.


const anyjson = require('any-json')
const obj = await anyjson.decode(/* string to parse */, /* format (string) */)
const str = await anyjson.encode(/* object to encode */, /* desired format (string) */)


Contributions welcome! If any-json is not meeting your needs or your have an idea for an improvement, please open an issue or create a pull request.


For detailed release history, see Releases.

  • v3 Re-written to be Promise-based and bi-directional (serialization capabilities as well as parsing).
  • v2 removed the experimental/unreliable format detection.