CSV to JSON Converter – Free Online Tool

Input

Output

Ready

Ln 1, Col 1

Convert CSV to JSON

Paste CSV exported from Excel, Google Sheets or a database, and get a JSON array with one object per row. The first row provides the keys. Because the result is JSON, you can also convert it onward to YAML, XML or code.

How to use it

Paste CSV into the Input panel (already in CSV mode), or open a .csv file.
The JSON array appears in the Output panel.
Copy or download it, or choose another format from Convert.

How CSV is converted

Delimiter detection for commas, semicolons, tabs and pipes.
Quoted fields with embedded commas, quotes and line breaks (RFC 4180).
Numbers, true/false and null become JSON types; empty cells become null.
Dotted headers like address.city become nested objects.

More JSON tools

All tools are free and run privately in your browser.

JSON FormatterBeautify, validate & convert JSON ValidatorFind errors by line and column JSON ViewerCollapsible tree with search JSON MinifierCompress JSON, see bytes saved JSON RepairFix broken JSON automatically JSONPath TesterQuery and filter JSON JSON EscapeStringify and unescape JSON JSON to YAMLReadable YAML for configs JSON to CSVArrays to spreadsheet rows JSON to XMLWell-formed XML output CSV to JSONSpreadsheets to JSON arrays JSON Schema GeneratorInfer a draft 2020-12 schema JSON to TypeScriptInterfaces with optional fields JSON to GoStructs with json tags JSON to JavaRecords with Jackson annotations JSON to KotlinData classes for kotlinx.serialization JSON to SwiftCodable structs with CodingKeys JSON to DartFlutter models with fromJson JSON to C#Classes for System.Text.Json JSON to C++Structs for nlohmann/json JSON to CTyped structs for C JSON to PHPReadonly DTO classes JSON to PythonDataclasses with type hints

CSV to JSON FAQ

How do I convert a CSV file to JSON?

Open the file with the upload icon or drop it onto the Input panel. .csv files switch the input to CSV mode automatically.

Are numbers kept as numbers?

Yes. Values that look like numbers or booleans are converted. Very long digit strings, such as IDs, stay as strings so no precision is lost.

Is my data uploaded to a server?

No. The CSV to JSON runs entirely in your browser using JavaScript. Your data is never uploaded, logged or stored, and the tool keeps working offline after your first visit.