CSV to JSON & JSON to CSV Converter – Instant Private Tool

✓ Runs locally in your browser — Your data isn't uploaded Supports CSV, TSV, Pipe, & Semicolon

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Input Code

Ln: 1 Col: 1 0 chars

Output

Ready Ln: 1

Client-Side CSV & JSON Data Converter — Features & Guide

Nadhebe CSV to JSON Converter transforms tabular spreadsheet data into structured JSON object arrays instantly inside browser memory.

When to use this tool

Convert exported Excel or Google Sheets CSV files into JSON for frontend web applications
Transform database export CSV files into JSON array payloads for REST API testing
Convert JSON arrays into downloadable `.csv` files for business reporting
Process pipe (`|`) or semicolon (`;`) delimited data files without opening spreadsheet software

Supported features

Multiple Delimiters: Auto-detects and parses comma (,), tab (\t), pipe (|), and semicolon (;) delimited data.
Two-Way Transformation: Convert CSV to JSON or export JSON array payloads to formatted CSV files.
Local File Processing: Drag and drop local .csv or .tsv files directly into the workbench.

Related tools

Format converted JSON objects with JSON Formatter, or generate TypeScript interfaces from your CSV data using JSON to TypeScript Generator.

Frequently Asked Questions

Common questions about this tool.

Is my uploaded CSV data stored on any server? ▼

No, 100% of calculations and file conversions execute locally in your browser memory. Your raw data is never uploaded or logged on any external server.

Can I convert tab-separated values (TSV) into JSON? ▼

Yes, select the tab delimiter option or upload a `.tsv` file to convert tab-separated data into formatted JSON objects.

Can I convert JSON back into CSV format? ▼

Yes! Click the "Convert to CSV" button in the workbench header to export JSON arrays of objects back into tabular CSV string format.

How are CSV headers handled during conversion? ▼

The first row of the CSV is automatically parsed as property keys for the resulting JSON object array. If headers are missing, numeric index keys are assigned.

What is the maximum CSV file size I can convert? ▼

Because processing happens entirely in browser JavaScript memory, files up to 50MB (over 100,000 rows) convert in seconds without network timeout limits.