Free CSV to JSON Converter — Convert Spreadsheets

Convert CSV spreadsheets and table data into structured JSON objects or arrays in seconds. Configure delimiter options, handle quoted multi-line fields, and transform spreadsheet exports into developer-ready JSON format entirely in browser memory for complete data privacy. Parse large datasets without uploading proprietary files to third-party servers, keeping your customer lists, sales figures, and records completely confidential.

100% Client-Side PrivacyZero Installation

Data Transformation

Easily convert CSV exports from your CRM (like Mailchimp or Hubspot) into JSON for API integrations or web development tasks.

How to Use

  1. 1Paste raw CSV text or upload your .csv spreadsheet file.
  2. 2Configure parsing options (headers, auto-type conversion).
  3. 3Copy or download your formatted JSON array.

Common Use Cases

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    Importing Excel and Google Sheets data into web databases and APIs.

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    Converting product tables for web application mockup state.

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    Migrating legacy spreadsheet exports to modern JSON formats.

Got Questions?

Frequently Asked Questions

Does the converter recognize commas within quotes?
Yes, it conforms strictly to RFC 4180 CSV specifications, handling quoted commas and line breaks properly.
Can it convert JSON back to CSV?
Yes, you can toggle between CSV-to-JSON and JSON-to-CSV modes.
Are spreadsheet rows uploaded to a server?
No, parsing executes in local browser memory using PapaParse.

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