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Table converters · CSV

CSV to JSON converter

Paste CSV and get a clean JSON output. Nothing leaves your browser.

Runs in your browser No signup Free forever
Convert
CSV

Switch the target to jump straight to any of the 28 CSV converters.

Input csv
Table 0 rows
Dimensions: 0 x 0
Output json
Nothing is uploaded
Same source, other targets

Convert CSV to anything else

ActionScript .as ASCII .txt ASP .asp Avro .avro BBCode .bb DAX .dax Excel .xlsx Firebase .json HTML .html INI .ini LaTeX .tex Markdown .md MATLAB .m MediaWiki .wiki Pandas DataFrame .py Protobuf .proto Qlik .qvs R DataFrame .r RDF .rdf reStructuredText .rst SQL .sql Textile .textile TOML .toml TracWiki .wiki TSV .tsv XML .xml YAML .yml

All table converters

How it works

Three steps, no account

1

Paste or drop your CSV

Comma-separated values with a header row works best. You can also upload a .csv file directly.

2

Review the table

Transpose it, delete blank rows, or remove duplicates before you generate output.

3

Pick a format and generate

Choose from 28 output formats, then copy the result or download it as a file.

FAQ

Common questions

Is my data uploaded anywhere?
No. Parsing, editing, and generating output all run in your browser using JavaScript — the CSV you paste or upload never touches a server.
How large a file can I convert?
There's no server-side limit because there's no server involved — your browser's own memory is the ceiling.
What happens if a row has the wrong number of columns?
The parser expects every row to have the same number of comma-separated values as the header row and flags "Invalid CSV format" if one doesn't — fix the mismatched row and it'll re-parse as you type.
Can I edit the data before converting?
Yes — the table below the input lets you transpose rows and columns, delete blank rows, or remove duplicate rows before you generate the final output.
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How to Convert CSV to JSON Online?

Transform your CSV (Comma-Separated Values) data into structured JSON format with our online converter. Perfect for data integration, API development, or converting spreadsheet data into a programmable format.

1. Upload or paste your CSV

Just paste your CSV data or drag-and-drop your CSV file into the textarea of Data Source. The converter will automatically detect the delimiter and structure of your data.

2. Customize your JSON output

Configure your conversion settings to get the exact JSON structure you need:

  • Choose column headers as keys
  • Select custom delimiters (comma, tab, semicolon)
  • Specify data types for columns
  • Array or object output format
  • Pretty print or minified output

3. Copy the converted JSON

The JSON code is generated instantly as you make changes. Preview the output in real-time and copy the formatted JSON to your clipboard with a single click.

Note: Your data is secure. All conversions are performed locally in your web browser, and we do not store any of your data.

What is CSV?

CSV (Comma-Separated Values) is a simple file format used to store tabular data, such as a spreadsheet or database. Each line of the file is a data record, with each field separated by commas.

Supported CSV Formats

  • .csv
  • .tsv
  • .txt
  • Excel exported CSV

What is JSON?

JSON (JavaScript Object Notation) is a lightweight, text-based format for storing and transporting data. It's easy for humans to read and write and easy for machines to parse and generate.

Supported JSON Formats

  • .json
  • .jsonl
  • .geojson