About TrueJSON
TrueJSON was engineered for developers, data scientists, and analysts who demand instant, reliable format conversions without putting their sensitive API keys, customer lists, or databases at risk.
100% Client-Side
All transformations run inside your browser engine using PapaParse. Your datasets are never transmitted across the wire or saved to any database.
Nested Flattening
Deeply nested JSON objects and arrays are flattened using dot notation (e.g., user.address.city) for direct compatibility with spreadsheets.
No Limits, No Paywalls
Free forever without file size limits, daily quotas, or sign-up requirements. Supported cleanly by non-intrusive standard web ads.
How It Works Under the Hood
Traditional online format converters send your data payloads to server-side backend environments (often running Node.js, Python, or PHP). This introduces severe security vulnerabilities: confidential records, PII, internal API tokens, and transactional metrics pass through third-party load balancers and web logs.
TrueJSON completely rethinks this architecture. By utilizing the browser's native V8 JavaScript engine and dedicated Web Workers, TrueJSON processes multi-megabyte datasets locally in milliseconds without main thread freezes.
- PapaParse Integration: Powered by the battle-tested PapaParse library for RFC 4180 compliance, auto-delimiter sniffing, and fast CSV generation.
- Web Worker Threading: Large files (> 5MB) are parsed inside background Web Workers, streaming status updates without blocking the browser UI.
- Dynamic Type Coercion: Numbers, booleans, and null values in CSV files can be converted automatically into native JSON data types.
TrueJSON is the 4th utility in the true* network of zero-upload, client-side web tools designed to replace data-harvesting cloud utilities: