CSV to JSON Converter

Convert CSV into structured JSON with delimiter detection, header rows, and pretty output.

Runs locally in your browser. Your input is not uploaded.

Delimiter

Output

Pretty print

CSV input

JSON output

Converted JSON will appear here.

Intended for small and medium pasted CSV snippets. Very large files can strain browser memory.

How to use CSV to JSON

Paste CSV into the input area.
Choose auto delimiter detection or select comma, semicolon, or tab.
Choose object output when the first row contains headers, or row arrays when you want raw rows.
Convert, then copy the JSON output.

Copy patterns and edge cases worth checking.

name,role
Ada,engineer
Grace,admiral

[
  {
    "name": "Ada",
    "role": "engineer"
  },
  {
    "name": "Grace",
    "role": "admiral"
  }
]

Pick semicolon when auto detection is not enough.

campaign;clicks
Brand;120
Search;87

[
  {
    "campaign": "Brand",
    "clicks": "120"
  },
  {
    "campaign": "Search",
    "clicks": "87"
  }
]

Short answers before you paste real data.

This tool works with pasted CSV text rather than file uploads, so the contents stay in your browser.

Yes. CSV parsing is handled with Papa Parse, including common quoted-field cases.

No. This browser tool is intended for small to medium snippets. Very large files can strain browser memory.

Useful next steps that also run locally in your browser.

Format, minify, and validate JSON with calm parse errors and copy-ready output.

Encode URL components, decode percent-encoded text, and parse query parameters.

Count words, characters, sentences, paragraphs, reading time, and keyword density.