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ProWebTools v2.0
Free Online Developer Utilities
Core Tool

Online CSV to JSON Converter

Instantly convert CSV files and spreadsheet data into valid, nicely indented JSON structures for web APIs, testing, and databases.

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Transforming Spreadsheets into Production-Ready JSON

Transferring data from legacy spreadsheets or exports into software engineering pipelines requires converting row-and-column data into structured JSON objects.

This utility reads CSV rows, extracts header names as keys, and automatically casts numeric values (e.g. 5.00) and boolean flags (true/false) into native JSON types rather than plain strings.

Frequently Asked Questions

How does the parser handle different delimiters like tabs or semicolons?

Our engine automatically inspects the first lines of input to infer commas, semicolons, or tab-delimited values.

Can I download the resulting JSON as a file?

Yes, click the Download (.json) button below the output window to save the parsed file directly to your disk.

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