FREE CSV TO JSON

Convert CSV to JSON for Free

Use the CSV header as keys and turn each data row into a JSON object.

Your input and result are never uploaded or stored.

  1. 1Enter data
  2. 2Convert in browser
  3. 3Use result

1 · Enter data

Enter CSV

Your input and result are never uploaded or stored.

Paste CSV with a header or load a CSV file.

0 characters · 0 bytesCSV, TXT · up to 5 MB

2 · Convert in browser

JSON output settings

JSON indentation

Every CSV cell remains a string so leading zeros in postal codes and long IDs are preserved.

3 · Use result

JSON result

Convert CSV to see a JSON object array here.

FREE CSV TO JSON GUIDE

How to turn CSV into a JSON array

The first CSV row becomes the JSON keys.
1

Enter CSV

Paste a header and data rows.

2

Convert to JSON

Choose indentation and convert.

3

Use the result

Copy JSON or download the file.

PRIVATE LOCAL DATA CONVERSION

Your file stays on your device

Only the conversion work runs in a separate browser thread.

No server upload

Input and output stay only in browser memory.

Web Worker

Conversion runs away from the main interface.

Standard text output

Copy or download without extra software.

FREE CSV TO JSON FAQ

CSV to JSON FAQ

Review formats, privacy, and conversion rules.
1Is my CSV uploaded?

No. Input and output are processed only in your browser.

2Are quoted commas supported?

Yes. Quoted commas, line breaks, and doubled quote escapes are supported.

3Are numbers converted automatically?

No. Every cell remains a JSON string to preserve values such as 00123.

4How is the first row used?

It becomes object keys. Empty or duplicate header names produce an error.