CSV to JSON Converter

Convert CSV to structured JSON instantly. Supports headers, custom delimiters (comma, semicolon, tab), and quote characters. 100% client‑side.

CSV to JSON Converter

CSV Input

JSON Output

Why use this converter?

Accurate Parsing

Handles quoted fields, escaped quotes, and CRLF line endings correctly.

Flexible Options

Choose header usage, delimiter (comma/semicolon/tab), and quote style.

Private & Local

All conversions happen in your browser. No uploads, no tracking.

Controls at a glance

Quickly understand what each control does so you can work faster.

⎘Copy

Copies the generated JSON to your clipboard. Perfect for pasting into code editors or API clients.

⬇Download

Downloads a .json file of your output so you can save or share it.

⛶Fullscreen

Expands the workspace for distraction‑free editing. Great for large datasets.

↔Split (Fullscreen)

In fullscreen, view CSV and JSON side‑by‑side. Toggle on/off to focus on the output.

What is CSV?

CSV (Comma‑Separated Values) is a plain‑text format for tabular data. Each row is a line; columns are separated by a delimiter (usually a comma, but semicolons or tabs are also common).

  • Pros: simple, human‑readable, broadly supported by spreadsheets.
  • Cons: no types or nesting; escaping quotes and commas can be tricky.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data‑interchange format that supports objects, arrays, strings, numbers, booleans, and null.

  • Pros: structured and nestable, great for APIs and configuration.
  • Cons: more verbose than CSV; strict syntax (quotes, commas, braces).

When should you convert CSV to JSON?

  • Importing spreadsheet data into web apps, databases, or APIs that expect JSON.
  • Preparing seed data or fixtures for frontend development.
  • Transforming reports into a format suitable for code or configuration files.

How to use this tool

  1. Paste your CSV or use Upload CSV.
  2. Choose Delimiter, Quote, and whether there is a Header row.
  3. Copy or Download the resulting JSON. Use Fullscreen (and Split) for large files.

FAQ

Does my data leave the browser?

No. Everything runs locally in your browser for privacy.

How are quotes handled?

Select single or double quotes; quoted fields can contain delimiters and escaped quotes.

Why is my JSON empty?

Check your delimiter and header settings; mismatches can yield empty objects.

Can I nest data?

CSV is flat. For nesting, post‑process the JSON or use a more expressive source format.