CSV to JSON Converter
Convert CSV spreadsheets to structured JSON data or JSON arrays instantly in your browser. Supports custom delimiters, header mapping, and Excel TSV. 100% free & private.
How to Use CSV to JSON Converter
Upload or Paste CSV Data
Paste your raw CSV string or drag-and-drop a .csv or .tsv file directly into the input editor.
Select Options & Delimiter
Choose your delimiter (Comma, Tab, Semicolon, or Pipe) and toggle whether the first row represents header column names.
Copy or Download JSON
The converted JSON array generates in real-time. Click "Copy" or "Download" to export your clean JSON dataset.
Capabilities & Standards
Programmatic Implementation & Code Snippets
Automating this workflow in your backend services, build scripts, or terminal pipelines? Copy these verified, idiomatic code examples:
import pandas as pd
# Read CSV file
df = pd.read_csv('input.csv')
# Export to JSON array of records with 2-space indentation
df.to_json('output.json', orient='records', indent=2)
print("CSV successfully converted to JSON!")import fs from 'fs';
import Papa from 'papaparse';
const csvContent = fs.readFileSync('input.csv', 'utf8');
const parsed = Papa.parse(csvContent, {
header: true,
skipEmptyLines: true,
});
fs.writeFileSync('output.json', JSON.stringify(parsed.data, null, 2));python3 -c "import csv, json; print(json.dumps(list(csv.DictReader(open('input.csv'))), indent=2))" > output.jsonFrequently Asked Questions
How do I convert CSV to JSON safely without uploading data? ▼
ToolNara executes the conversion entirely inside your browser using PapaParse and client-side JavaScript. Your confidential business spreadsheets and data never touch our servers.
Can this tool parse Tab-Separated Values (TSV) or Excel files? ▼
Yes. Set the delimiter to "Tab (TSV / Excel)" or simply drag your exported TSV spreadsheet file into the dropzone to convert it to JSON.
What is the structure of the converted JSON? ▼
When "First row has headers" is enabled, each row becomes an object whose keys match your column names: [ { "id": 1, "name": "ToolNara" } ].
Does this converter work completely offline? ▼
Yes! Once the webpage is loaded in your browser, all conversions execute locally with zero internet dependency.
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JSON to CSV Converter
Convert JSON to CSV or CSV to JSON instantly in your browser. Supports nested objects, custom delimiters, Excel TSV export, and drag-and-drop file upload. 100% free, no upload, no limits.