Input: CSV Data
Converted: JSON Output607 chars
100% Client-Side Privacy: Your spreadsheets, JSON data, and confidential records are processed entirely in browser memory. Nothing is ever sent to any remote server.
Quick answer

How to use the free CSV to JSON

To convert CSV to JSON for free, paste your CSV text or upload a .csv file. The converter automatically detects delimiters, parses numbers and booleans, and generates formatted JSON or a data table. You can also switch modes to convert JSON to CSV with 100% in-browser privacy.

Free online CSV to JSON & JSON to CSV converter

Convert comma-separated values (CSV) to JavaScript Object Notation (JSON) and vice versa with instantaneous client-side processing. Inspect your data with a live tabular preview, auto-detect delimiters, format numbers, and download formatted JSON or CSV files without uploading data to third-party servers.

How to convert CSV to JSON

  • Paste your CSV data directly into the input box or upload a .csv file.
  • The converter automatically detects your column headers and delimiter (comma, tab, semicolon, pipe).
  • Toggle numeric and boolean type parsing to convert "123" to numbers and "true" to booleans.
  • Switch to Table Preview to audit rows and columns before copying or downloading your JSON file.

Why use in-browser data conversion

Customer lists, financial records, export dumps, and internal spreadsheets often contain private or regulated information (PII). ToolCrix executes all parsing and conversions in your browser's local memory, ensuring your confidential business data is never transmitted over the internet or saved to remote databases.

Key features & benefits

  • Bidirectional conversion: switch seamlessly between CSV → JSON and JSON → CSV.
  • Smart delimiter detection: automatically handles commas, tabs, semicolons, and pipes.
  • Table preview: visual spreadsheet inspector to review formatted rows and headers.
  • 100% private & secure: data remains exclusively in your device's browser memory.
Questions

Frequently asked questions

Is my CSV or JSON data uploaded to any server?

No. All parsing, conversions, and downloads occur strictly within your web browser's memory using JavaScript. Sensitive financial, customer, or business data is never transmitted over the network.

Can I convert JSON back to CSV?

Yes. Simply click the 'JSON → CSV' button or upload a .json file. ToolCrix automatically extracts unique object keys as CSV column headers and formats rows with proper quotes and escaping.

Does this handle custom delimiters like semicolons and tabs?

Yes. You can select Auto-detect, Comma (,), Semicolon (;), Tab (\t), or Pipe (|). ToolCrix correctly splits and quotes fields based on your chosen delimiter.

Are numeric and boolean values preserved as types in JSON?

Yes. When 'Parse Numbers & Booleans' is checked, values like 100 and true are converted to native numbers and booleans rather than strings.

Is there any row or file size limitation?

No artificial limits are imposed. You can convert spreadsheets with tens of thousands of rows smoothly, bound only by your browser's memory.

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