CSV to JSON
Convert CSV tables to structured JSON directly in your browser.
CSV
JSON
- File size — up to 20 MB
- Processing is instant, directly in the browser
- Quotes and commas inside fields are supported
About the CSV to JSON converter
CSV (Comma-Separated Values) is a simple text format for tabular data. It is understood by Excel, Google Sheets, Numbers and almost any database. JSON (JavaScript Object Notation) is a format used by programmers and web applications. If you need to load data from a table into code, a database or an API — converting CSV to JSON will be the first step.
Our converter transforms CSV to JSON directly in your browser. The file is not sent to the server — all processing happens on your device. This means your data remains private and no one but you has access to it.
What the converter can do
- Headers: the first CSV row becomes the keys of JSON objects.
- Quotes: fields in double quotes are handled correctly, even if they contain commas.
- Delimiters: comma, semicolon, tab and other characters are supported.
- Trimming: extra spaces at the beginning and end of fields are removed.
How to use
- Drop the CSV file into the upload area, select it via the file browser, or paste the text manually.
- Configure the options: headers, delimiter, trim spaces.
- Click "Convert to JSON".
- Copy the result or download it as a data.json file.
Frequently asked questions
Where do my files go? Nowhere. The file is processed in the memory of your browser and disappears when you close the page.
Is there a limit on the number of conversions? No. You can convert as many times as you want.
What if the CSV has no headers? Uncheck "First row — headers", and the converter will create keys like column1, column2, etc.
Which delimiter should I use? For standard CSV — a comma. For Excel files in some regions — a semicolon. You can enter any character.