BI-DIRECTIONAL DATA MAPPER

CSV ↔ JSON CONVERTER

Convert tabular CSV spreadsheets into JSON objects or flatten JSON arrays into downloadable CSV files directly in your browser.

1. INPUT CSV DATA

DROP FILE HERE OR PASTE TEXT BELOW

accepts direct file uploads or raw code text

ACCEPTED FORMATS:.CSV / .TXT

100% PRIVATE • LOCAL MEMORY EXECUTION ONLY

0 CHARACTERS • 1 LINES

2. CONVERTED JSON OUTPUT

INDENT:

DELIMITER:

AUTO TYPES

CONVERTED OUTPUT WILL APPEAR HERE IN REAL-TIME

HOW TO CONVERT CSV & JSON DATA IN 3 STEPS

Select Direction & Input

Choose CSV to JSON or JSON to CSV mode. Drop a file into the workspace or paste raw code directly into the editor.

Configure Formatting

Adjust JSON indentation spacing, auto-detect data types, choose custom delimiters, or select nested object flattening.

Copy or Export

Copy the syntax-highlighted output to your clipboard or trigger a direct file download (`.json` or `.csv`).

100% CLIENT-SIDE

Data parsing runs strictly inside browser JS memory. Zero network uploads.

AUTO TYPE DETECTION

Automatically casts string numbers (`"42"`) to numeric and booleans to native JSON types.

DOT-NOTATION FLATTENING

Optionally flattens deeply nested JSON structures into tabular `user.address` CSV headers.

CUSTOM DELIMITERS

Full support for Commas, Semicolons, Tabs, and Pipe-delimited database files.

FREQUENTLY ASKED QUESTIONS

When converting nested JSON objects (e.g. {'user': {'name': 'Alice'}}), Dot Notation creates flattened spreadsheet column headers like 'user.name'. Alternatively, you can choose 'Stringify Objects' to output the JSON string directly into a single cell.