jsoncsv (with mkexcel) is a command tool to convert json file to csv/xlsx file.

It's simple, and no need user to specify the keys.

Just use them.

• Python 3.11 or higher

Cat the raw.json to csv/xls use command line tool

cat raw.json | jsoncsv | mkexcel > output.csv
cat raw.json | jsoncsv | mkexcel -t xls > output.xls

Each line of raw json text file is a json object

{"id":1, "name":"A", "year": 2015}
{"id":2, "name":"S", "zone": "china"}

Jsoncsv will output a csv file

id,name,year,zone
1,A,2015,
2,S,,china

This is easily and needn't care the different keys from any two object.

If input file is an json_array, use -A/--array to decode it

cat raw.json | jsoncsv -A | mkexcel > output.csv

Input File

[
    {"id":1, "name":"A", "year": 2015},
    {"id":2, "name":"S", "zone": "china"}
]

Output File

id,name,year,zone
1,A,2015,
2,S,,china

jsoncsv raw.json expand.json
mkexcel expand.json -t xls output.xls

get more options with --help.

jsoncsv --help
mkexcel --help

Using pip (recommended):

pip install jsoncsv

Using uv (faster):

uv pip install jsoncsv

For development:

git clone https://github.com/alingse/jsoncsv
cd jsoncsv
uv pip install -e ".[dev]"

Just expand/restore the json, the expand json is one layer json.

jsoncsv raw.json expand.json
jsoncsv -r expand.json raw.json
cat raw.json | jsoncsv | jsoncsv -r > raw2.json

mkexcel the expanded json (one layer)

mkexcel expand.json output.csv
mkexcel -t xls expand.json > output.xls
mkexcel -t csv expand.json > output.csv

expand json, 展开 json

jsoncsv -e raw.json expand.json
cat raw.json expand.json
{"s":[1,2,{"w":1}]}
{"s.2.w": 1,"s.0": 1,"s.1": 2}

{"s":[1,2,{"w":1}]} will transformed to {"s.2.w": 1,"s.0": 1,"s.1": 2}

the output "expand.json" is only one layer json, it can be easy change to csv or xlsx (with mkexcel)

restore the expanded json 重构被展开的json

jsoncsv -r expand.json raw.json
cat expand.json raw.json
{"s.2.w": 1,"s.0": 1,"s.1": 2}
{"s": [1, 2, {"w": 1}]}

{"s.2.w": 1,"s.0": 1,"s.1": 2} change to {"s":[1,2,{"w":1}]}

separator used to combine the keys in the tree

default separator is .

on safe mode, use escape separator to avoid confilct

expand:

['aa', 'bb', 'www.xxx.com'] --> 'aa\\.bb\\.www.xxx.com'

restore:

'aa\\.bb\\.www.xxx.com' --> ['aa', 'bb', 'www.xxx.com']

Lint and format:

ruff check .
ruff format .

Run tests:

pytest

Type checking:

mypy jsoncsv

Build package:

python -m build

Apache License 2.0