Document Utility

CSV to JSON Converter

Upload a CSV file, convert it into a JSON array, apply delimiter, header handling, trimming, and automatic type conversion options, then copy the result or download it as a JSON file.

CSV to JSON Conversion Convert CSV row data into a JSON array structure.

Header Handling Use the first row as JSON keys or generate automatic keys such as column_1.

Copy and Download Copy the converted JSON result instantly or save it as a JSON file.

File No file

Rows 0

Columns 0

Output JSON

CSV Upload

Upload a CSV file, then choose delimiter and JSON conversion options.

CSV Drag a CSV file here or click to upload. Supports comma, tab, semicolon, and pipe delimiters, and converts CSV to JSON directly in the browser.

No CSV file has been uploaded yet.

Delimiter

If all values appear in one column, try changing the delimiter.

First Row Handling

For CSV files without headers, keys such as column_1 and column_2 are generated automatically.

JSON Indentation

Choose readable formatted JSON or compact JSON output.

Preview Rows

Number of CSV rows to display in the preview.

Trim Spaces Remove leading and trailing spaces from each cell value. Remove Empty Rows Exclude completely empty rows from the result. Automatic Type Conversion Convert numbers, true, false, and null values into actual JSON types.

Notice

If the first row used as JSON keys contains blank or duplicate values, keys may be automatically adjusted. For files without headers, using automatic key generation is recommended.

Recommended Conversion Presets

Quickly apply common conversion options based on your CSV structure and use case.

JSON Conversion Result

Check the converted JSON result, copy it, or save it as a file.

Ready

Result Rows -

Output Length -

Conversion Status Waiting

Help

When should I use CSV to JSON conversion?

Use CSV to JSON conversion when you want to turn order lists, product data, member information, or statistics downloaded as CSV into API test data, development samples, or frontend mock data.

What does using the first row as keys mean?

It means using the first row of the CSV as property names in each JSON object. For example, if the first row is name,email, each row is converted into a structure like {"name":"...","email":"..."}.

What is automatic type conversion?

CSV values are strings by default. When automatic type conversion is enabled, numbers, true, false, and null values are converted into matching JSON types. Turn it off if you want to keep every value as a string.

Is the file stored on the server?

This utility reads CSV files and converts them to JSON in the browser. In normal use, uploaded CSV files are not stored on the server.