Updated: August 2026 • Verified v1.2

CSV to JSON & JSON to CSV Converter

Developer Tools

Bi-directional tabular data converter between CSV/TSV spreadsheets and structured JSON arrays with custom delimiter support.

Local Browser Execution: Your input is processed locally in your browser and is not sent to UTL servers.

RFC 4180 Tabular Tokenizer & Serializer

Understanding Your Results

Auto-detects column headers, infers numeric and boolean types, and handles custom delimiters (commas, tabs, semicolons, pipes).

Ensure the first line contains unique column header names. Use the delimiter dropdown if parsing European semicolon CSVs.

Technical Scope & Calculation Limitations

Deeply nested JSON objects are flattened during JSON-to-CSV serialization.

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