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from $30.00 / 1,000 conversion completeds

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JSON <> CSV Converter

Try for free

Convert between JSON arrays and CSV in both directions. JSON objects are flattened (nested keys become dot-notation columns), CSV values get light type inference (numbers, booleans, nulls).

Pricing

from $30.00 / 1,000 conversion completeds

Rating

0.0

(0)

Developer

Luqin Wang

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Total users

Monthly active users

2 hours ago

Last modified

JSON ↔ CSV Converter

Convert data between JSON and CSV in both directions, with sensible defaults:

JSON → CSV: nested objects become dot-notation columns (e.g. address.city), arrays become JSON strings in a single cell. Header row is the union of all keys.
CSV → JSON: light type inference — empty cells become null, true/false become booleans, numeric cells become numbers, everything else stays a string.

Input

Field	Description
Direction	`JSON -> CSV` or `CSV -> JSON`
Input file URL	Public URL of a JSON or CSV file
Or: paste input text	Paste the JSON or CSV content directly
CSV delimiter	`,` `;` tab or `
Flatten nested JSON objects	On by default (JSON → CSV only)

Output

Dataset: one item per converted row/object
Key-value store OUTPUT.csv / OUTPUT.json: the converted file

Large converted files are stored as bounded parts. In that case the normal output key contains a small pointer to a manifest that identifies the parts in concatenation order.

Reliability and limits

Input is admitted up to 8 MiB and URL responses are read in bounded chunks.
Billing intent and an exact source snapshot are stored before each charge.
A charge failure stops conversion; charged batches are checkpointed before a later batch is charged.
Partial billing preserves every unpaid source item and publishes a separate preservation report.
CSV parsing is strict: headers must be nonempty and unique, and every row must have the header's field count. CR, LF, CRLF, and mixed endings work.

Pricing (pay-per-event)

$0.03 per conversion run
$0.0001 per row/item converted

Run via API

curl -H "Authorization: Bearer $APIFY_TOKEN" \
     -H "Content-Type: application/json" \
     -d '{"direction": "jsonToCsv", "inputText": "[{\"a\": 1}, {\"a\": 2}]"}' \
     "https://api.apify.com/v2/acts/<username>~json-csv-converter/runs?waitForFinish=60"

Local development

mkdir -p storage/key_value_stores/default
# put {"direction": "jsonToCsv", "inputText": "..."} in storage/key_value_stores/default/INPUT.json
APIFY_LOCAL_STORAGE_DIR=./storage python3 -m src.main

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