How to Convert CSV to JSON (Free, in Your Browser)

CSV is great for spreadsheets, but code and APIs usually want JSON. Converting is quick and, with a browser-based tool, completely private.

Convert CSV to JSON in 3 steps

1. Open the free CSV to JSON converter.
2. Paste your CSV or upload the file.
3. Copy or download the JSON array.

How the conversion works

With a header row, each column header becomes a key and each row becomes an object:

name,age
Kim,30

becomes

[{ "name": "Kim", "age": "30" }]

Tips

• Inspect first. Use the CSV Viewer to confirm columns are parsed correctly, especially with commas inside quoted fields.
• Tidy the JSON. Run the result through the JSON Formatter to validate and beautify it.
• Need the reverse? Use JSON to CSV.

Frequently asked questions

Does the first row become keys? Yes, when the header option is on. Otherwise rows become arrays of values.

Are my files uploaded? No. Conversion happens entirely in your browser.