ToolocoTooloco

CSV to JSON Converter

Convert CSV data to JSON format online. Paste your CSV and get formatted JSON instantly.

📄

Drop a .csv file or click to upload

About this tool

CSV (Comma-Separated Values) is a common format for spreadsheet data, database exports, and data analysis files. JSON is the preferred format for web APIs and JavaScript applications. Converting CSV to JSON is a routine task in data pipelines and web development. This tool parses your CSV — treating the first row as headers — and produces a JSON array of objects where each row becomes an object with keys from the header row.

  • ✅ Free to use, no sign-up required
  • ✅ Files never leave your device
  • ✅ Instant conversion
  • ✅ Works on any browser and device

How it works

The first row of your CSV is parsed as the column headers. Each subsequent row is converted to a JSON object with those headers as keys. Values are trimmed of surrounding whitespace. The result is a JSON array of objects, one per data row. You can paste CSV directly or upload a .csv file. The output can be copied to the clipboard or downloaded as a .json file.

Frequently Asked Questions

Does the first row need to be a header row?
Yes — this tool assumes the first row contains column names, which become the keys in the JSON output objects. If your CSV has no header row, add one before converting.
What delimiter does this tool support?
The tool auto-detects comma (,) and semicolon (;) delimiters, which cover the vast majority of CSV files. Tab-separated files (.tsv) are also supported.
Can I upload a CSV file instead of pasting?
Yes — you can either drag and drop a .csv file onto the upload zone or click "Upload CSV" to choose a file. The CSV content is loaded and converted automatically.
What happens with quoted fields that contain commas?
Quoted fields (values wrapped in double quotes) are handled correctly — commas inside quoted fields are treated as part of the value, not as delimiters.

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