CSV to JSON Converter
Paste CSV data and get pretty-printed JSON — supports delimiters, header toggle, and value trimming
Examples
CSV with headers → array of objects
name,age,city
Alice,30,New York
Bob,25,Boston
// Output:
[
{ "name": "Alice", "age": "30", "city": "New York" },
{ "name": "Bob", "age": "25", "city": "Boston" }
]With the 'First row is header' toggle on, each subsequent row maps to a JSON object whose keys come from the header row.
Headerless CSV → array of arrays
Alice,30,New York
Bob,25,Boston
// Output:
[
["Alice", "30", "New York"],
["Bob", "25", "Boston"]
]With headers disabled, every row becomes a plain array of strings, preserving the original column order.
Details
This tool uses the PapaParse library to reliably parse CSV text in your browser. When 'First row is header' is enabled, each data row becomes a JSON object keyed by the header names. When disabled, rows become plain arrays. Auto-delimiter detection picks the right separator automatically, or you can force comma, semicolon, or tab. The trim option strips leading and trailing whitespace from every value before serialisation. All processing happens locally — your data never leaves your browser.
About this tool
CSV to JSON Converter runs entirely in your browser on DevTools — no signup, no upload.
What this tool does not do
- CSV to JSON Converter is a free in-browser utility, not a hosted API, and keeps no server-side history.
How to use this tool
Using CSV to JSON Converter
Open CSV to JSON Converter, enter or paste your input, and copy the result.
Related guides
JSON Lines (NDJSON): Streaming JSON for Logs, Pipelines and LLMs
What makes one-object-per-line files different from JSON arrays, when NDJSON shines, and how to work with it in any language.
From Spreadsheet Rows to SQL INSERT Statements
How to turn a CSV export into typed, quoted, and safe SQL INSERT statements — and why the naive string-concatenation approach breaks on quotes, NULLs, and dates.
CSV and Markdown Tables: Bridging Spreadsheets and Documentation
How to convert CSV rows to clean GFM tables, handle pipes and newlines inside cells, and avoid the most common escaping mistakes.
JSON Formatting and Validation: Best Practices
Why strict JSON breaks so easily, the syntax errors that cause most failures, and the formatting habits that make JSON readable in diffs and reviews — with validation, minifying, and search tips.
Related tools
Base64 Toolbox
Professional Base64 workspace for text, files and images with Base64URL, MIME, Data URI, strict validation, image preview and ready-to-use snippets.
C# to VB.NET Converter
Convert a subset of C# — classes, methods, variables, loops — into VB.NET
CSV Data Viewer
Paste CSV and browse rows in a sortable table with delimiter detection
CSV to Chart
Paste or upload CSV data and generate bar, line, pie, or doughnut charts. Export as PNG.
CSV to Markdown Converter
Convert CSV to a Markdown table and Markdown tables back to CSV
CSV to SQL Converter
Generate SQL INSERT statements from CSV data