Is the CSV to JSON Converter free?

Yes — the CSV to JSON Converter is completely free, with no account, subscription, signup, or usage limits.

Is my data uploaded or stored?

No. The CSV to JSON Converter processes everything locally in your browser. Your input is never uploaded, saved, or shared with any server.

Does the CSV to JSON Converter work offline?

Yes. Once the page has finished loading, the CSV to JSON Converter works without an internet connection.

Which browsers does the CSV to JSON Converter work in?

The CSV to JSON Converter works in all modern browsers, including Chrome, Firefox, Safari, and Edge — no plugins or extensions needed.

Will number values be converted to actual JSON numbers?

CSV has no type system, so all values are initially parsed as strings. The tool outputs string values by default. If you need typed numbers, you'll need to post-process the JSON in your application.

CSV to JSON Converter

Convert CSV data to JSON format with custom delimiter support.

Delimiter

First row is header

Indent

CSV Input

JSON Output

JSON output appears here

Free browser-based tool · Runs 100% on your device · Last updated July 7, 2026

What is the CSV to JSON Converter?

The free CSV to JSON Converter transforms comma-separated or delimited text into clean JSON you can use in APIs, JavaScript applications, or databases. Paste your CSV into the input panel, set the Delimiter (comma, semicolon, tab, or pipe), toggle Has Header Row to control whether the first row becomes the key names, and choose an Indent level for pretty-printing. The JSON output appears instantly — no upload, no sign-up.

→ Converting exported spreadsheet data into JSON for a web application
→ Transforming CRM or database exports from CSV into a JSON API payload
→ Converting tab-separated data files (TSV) downloaded from analytics tools
→ Building mock data fixtures from spreadsheet data for development testing

How to Use the CSV to JSON Converter

1 Paste your CSV data into the input textarea.
2 Set the Delimiter to match your data (comma, semicolon, tab, or pipe).
3 Toggle Has Header Row on if the first row contains column names.
4 Choose an Indent size (2 or 4 spaces) for pretty-printed output.
5 Copy the JSON output or click Download to save it as a .json file.

Key Features

🔀
Four delimiter options

Handles comma, semicolon, tab (TSV), and pipe delimiters.
📋
Optional header row

Toggle header detection to use the first row as JSON key names.
🎨
Configurable JSON indent

Choose 2 or 4 spaces, or minified output — whatever your project needs.
⚡
Instant output

JSON appears as you type or paste — no submit button.
🔒
Free and private

100% in-browser — your data never leaves your device.

Example Usage

Example Input

name,age,city
Alice,30,Lagos
Bob,25,Abuja

Example Output

[{"name":"Alice","age":"30","city":"Lagos"},{"name":"Bob","age":"25","city":"Abuja"}]

Frequently Asked Questions about the CSV to JSON Converter

What is the CSV to JSON Converter?: The CSV to JSON Converter is a free online tool that lets you convert CSV data to JSON format with custom delimiter support. It runs entirely in your browser, so there is nothing to install and nothing is uploaded to a server.
Is the CSV to JSON Converter free?: Yes — the CSV to JSON Converter is completely free, with no account, subscription, signup, or usage limits.
Is my data uploaded or stored?: No. The CSV to JSON Converter processes everything locally in your browser. Your input is never uploaded, saved, or shared with any server.
Does the CSV to JSON Converter work offline?: Yes. Once the page has finished loading, the CSV to JSON Converter works without an internet connection.
Which browsers does the CSV to JSON Converter work in?: The CSV to JSON Converter works in all modern browsers, including Chrome, Firefox, Safari, and Edge — no plugins or extensions needed.
Will number values be converted to actual JSON numbers?: CSV has no type system, so all values are initially parsed as strings. The tool outputs string values by default. If you need typed numbers, you'll need to post-process the JSON in your application.