CSV to JSON

This CSV to JSON converter is a lightweight, efficient, and user-friendly web tool that lets you transform structured CSV data into clean, structured JSON in seconds.

How It Works?

The tool features a two-pane interface:

• On the left, users can input or paste CSV data.
• On the right, a real-time preview shows the converted JSON output.

As soon as you enter or modify the CSV, the tool parses and renders the equivalent JSON immediately.

CSV Parsing Options

To give users control over how data is interpreted, the tool includes a comprehensive CSV Parsing Options panel:

• Delimiter Selection: Choose between comma, tab, semicolon, or other custom delimiters.
• First Row as Headers: If checked, the tool treats the first row of the CSV as header fields.
• Numeric Value Parsing: Automatically detects and converts strings like "123" to actual numbers.
• Boolean Parsing: Converts "true" and "false" (case-insensitive) to their boolean counterparts.
• Trim Whitespace: Ensures cleaner field names and values by removing unnecessary leading/trailing spaces.
• Skip Empty Lines: Helps clean noisy data by ignoring blank rows.
• Unflatten Nested Objects: A powerful feature that converts headers like address_city into nested JSON:

These options are ideal for developers needing fine-tuned control over data structure during transformation.

Fetch CSV from Web

You can load CSV directly from a public URL with CORS support. This is especially helpful for users pulling datasets from online sources or APIs. Just paste the URL, click Fetch CSV, and the tool will load and convert the file instantly.

Export

Once your CSV is converted, the JSON can be:

• Copied directly from the interface.
• Downloaded using the Export button

The JSON output is pretty-printed for readability, making it easy to inspect and ready for use in code, APIs, or storage.