CSV to JSON Converter
Convert CSV to JSON
What Is This Tool?
The CSV to JSON Converter parses CSV data — using the first row as column headers — and turns each subsequent row into a JSON object, producing a clean JSON array. It correctly handles quoted fields containing commas, quotes, or newlines, so real-world spreadsheet exports convert reliably. All parsing happens locally in your browser.
How to Use
Paste CSV data with a header row into the input box.
Click Convert to parse it into JSON.
Copy the result or download it as a .json file.
Features
- RFC 4180-aware parsing of quoted fields
- Handles embedded commas, quotes, and newlines in cells
- Uses the first row as JSON object keys
- Copy to clipboard or download as a file
- 100% client-side — nothing leaves your browser
Examples
Before (CSV):
name,age,city Ada Lovelace,36,London Grace Hopper,85,"New York, NY"
After (JSON):
[
{ "name": "Ada Lovelace", "age": "36", "city": "London" },
{ "name": "Grace Hopper", "age": "85", "city": "New York, NY" }
]
Common Use Cases
- Importing a spreadsheet export into an application
- Converting bank or analytics CSV exports into JSON for scripts
- Preparing seed data for a database or test fixture
- Turning a CSV log file into structured JSON records
Frequently Asked Questions
Does it handle quoted fields with commas inside them?
Yes. The parser follows RFC 4180 rules: a field wrapped in double quotes can contain commas and newlines, and doubled quotes inside a quoted field represent a literal quote character.
Are all values converted to strings?
Yes, every CSV cell becomes a JSON string, since CSV has no native type information. You can post-process the JSON if you need numbers or booleans.
What if rows have fewer columns than the header?
Missing trailing cells are filled in as empty strings so every object has the same set of keys as the header row.
Does it support different delimiters like semicolons?
Currently only comma-delimited CSV is supported. Semicolon or tab-delimited files would need to be converted to commas first.
Is my data uploaded anywhere?
No. Parsing happens entirely in your browser using JavaScript. Nothing is sent to a server.
Can I download the result?
Yes, click Download to save the JSON output as a data.json file.