Google Sheet to JSON Converter
Convert Google Spreadsheets, CSV, or TSV files to clean JSON. Features type inference, custom headers, and client-side privacy. No backend.
Input Data
Configuration
JSON Output
About
This tool transforms tabular data - specifically from Google Sheets, CSV, or TSV files - into structured JSON (JavaScript Object Notation). Unlike simple split-based converters, this engine uses a lexical parser to handle edge cases like newlines within cells and escaped quotes, ensuring 100% data integrity.
Data processing happens entirely in your browser using local JavaScript APIs. This means your sensitive financial or user data is never transmitted to a server. The conversion complexity is linear, O(n), making it efficient even for datasets with thousands of rows.
Pro Tip: To import directly from Google Sheets, the sheet must be Published to the Web (File → Share → Publish to web) or you must export it as a .csv file first.
Formulas
The parser operates by iterating through the character stream S. For each character c at index i, the state T transitions based on delimiters and quote contexts.
This ensures that delimiters inside strings are treated as literals rather than separators.
Reference Data
| Feature | Supported | Notes |
|---|---|---|
| CSV/TSV Parsing | TRUE | Auto-detects delimiter |
| Quoted Fields | TRUE | Handles "New Lines" correctly |
| Type Inference | TRUE | Converts "123" to 123 |
| Max File Size | ~10MB | Browser memory limit |
| Privacy | TRUE | Client-side execution |