CSV / JSON Converter Formula-Safe

Two-way converter powered by Papa Parse. Preserves leading zeros in codes/ZIPs by default, handles quoted commas and newlines, and offers formula-safe CSV export against spreadsheet injection.

100% Client-Side

Preserve Leading Zeros

Input CSV

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Output JSON

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Formula Injection Protection: When exporting to CSV, fields beginning with =, +, -, or @ can trigger formula execution in Excel or Google Sheets. The "Formula-Safe" option prefixes such cells with a single quote to prevent code execution.