CSV JSON

CSV to JSON Converter

Convert CSV to JSON in your browser. Free, private, and fast. Turn spreadsheet exports into an array of JSON objects ready for any API or codebase.

Drag & drop your CSV file here

or

Max file size: 50 MB · Your file stays in your browser

Your file is processed locally in your browser — nothing is ever uploaded.

Why Convert CSV to JSON?

Spreadsheets and database exports arrive as CSV, but applications and APIs want JSON. This converter reads the header row as keys and produces an array of JSON objects — quoted fields, embedded commas, and multiline values are handled correctly.

Common use cases

  • You have a CSV file and need it in JSON format.
  • The target software or platform requires JSON but your file is in CSV.
  • Typical use of JSON: REST API payloads and configuration files.
  • You want to reduce file size or improve compatibility without using desktop software.
Keep in mind: JSON has no comments, no date type, and gets hard to read when deeply nested or minified — formatting and conversion tools help.

How to Convert CSV to JSON

  1. Upload or drop your CSV file into the converter above.
  2. Adjust any output settings for JSON if needed.
  3. Click Convert and download your converted file instantly.

About the Formats

CSV (Comma-Separated Values)

CSV is a plain-text format for tabular data where each line represents a row and commas separate column values. It is the most universal data-exchange format — virtually every database, spreadsheet application, CRM, and analytics tool can import and export CSV files without any special configuration.

Compatibility: Universal — supported by Excel, Google Sheets, LibreOffice, every database system, and virtually all data tools.

JSON (JavaScript Object Notation)

JSON is the standard data-interchange format of the web. It represents structured data as nested objects and arrays in plain text — human-readable, language-independent, and natively supported by every programming language and API in common use.

Compatibility: Universal — every programming language, browser, and modern tool reads JSON.

100% Private & Browser-Based

Your files never leave your device. All conversion happens locally in your browser — nothing is uploaded to any server. No sign-up required.

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Need the reverse?

JSON to CSV Converter

FAQ

Frequently Asked Questions

Yes — completely free with no sign-up, no watermarks, and no size limits for typical files.

Quality depends on the output settings. For lossless output, choose the highest quality setting available.

Your file is processed entirely within your browser using local JavaScript. It is never uploaded to any server. Only you can access your file.

For browser-based conversion, files up to 50 MB work best. Very large files may take longer depending on your device. We recommend splitting very large files before converting.

Currently, AintoB converts one file at a time to keep the browser-based process simple and private. Reload the page to convert another file.