Data & Tables
CSV to JSON Converter
Convert CSV to JSON online. Turn header-based CSV rows into JSON objects locally in your browser without uploading data.
Tool
Convert CSV to JSON online. Turn header-based CSV rows into JSON objects locally in your browser without uploading data.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Use this CSV to JSON Converter to transform comma-separated rows into structured JSON. Header names become object keys, each data row becomes an object, and options can control delimiter, quote handling, empty values, and basic type detection. It is built for users who need developer-friendly data files, test fixtures, configuration records, or a cleaner format for local workflows.
Examples
- name,email,role,active Ada Lovelace,[email protected],Analyst,true Ben Ortiz,[email protected],Manager,false Cy Chen,[email protected],Designer,true
Frequently Asked Questions
Is my CSV data uploaded to a server?
No. The tool parses, transforms, previews, and exports data locally in your browser without uploading your input.
Which CSV details are supported?
The parser handles configurable delimiters, quote characters, UTF-8 text, optional BOM detection, mixed line endings, headers, and line breaks inside quoted fields.
How are data types detected?
Values can be inspected as strings first, then optionally detected as numbers, booleans, dates, or empty values. You can keep text mode when exact formatting matters.
What if the CSV has no header row?
The tool lets the user create default column keys such as column_1 and column_2, or manually promote a row to headers before export.
How are duplicate header names handled?
Duplicate headers should be reported and made unique in a predictable way, or the user should be asked to rename them before JSON export.