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CSV to JSON

▸About this tool

Convert CSV data to JSON format with automatic delimiter detection and header support. Paste CSV or upload a file.

▸Privacy and details

Your files never leave your device.

Fast browser processing with no account required.

Optimized for desktop and mobile with accessible controls.

▸How to use
  1. Paste your CSV data into the input area or upload a .csv file.
  2. Select the delimiter (comma, semicolon, tab, pipe) or use Auto-detect.
  3. Toggle "First row is header" to use column names as JSON keys.
  4. The JSON output appears instantly. Copy or download as .json.
▸Why use this tool

CSV is ubiquitous in spreadsheets and data exports, but APIs and modern applications work with JSON. This converter handles quoted fields, mixed delimiters, and nested data, running entirely in your browser with no file uploads.