CSV to JSON Converter Online
Convert CSV files to JSON format instantly in your browser. Our converter uses RFC 4180 compliant parsing to correctly handle quoted fields, embedded commas, newlines inside quotes, and escaped characters that break simpler tools.
- File upload or paste: Drag and drop .csv files or paste data directly
- Auto-detect delimiter: Automatically recognizes comma, semicolon, tab, and pipe separators
- 4 output formats: Array of Objects, Array of Arrays, Column-keyed, and JSON Lines (NDJL)
- Type inference: Automatically converts numbers, booleans, and null values
- RFC 4180 compliant: Handles quoted fields with embedded commas and newlines correctly
Looking for the reverse? Use our JSON to Sheets tool. For tab-separated data from spreadsheets, try Sheets to JSON.
How to convert CSV to JSON
Converting your CSV data takes just a few seconds:
- Paste your CSV data or drag and drop a .csv file onto the input area
- The tool automatically detects the delimiter (comma, semicolon, tab, pipe)
- Choose your output format from the toolbar: Objects, Arrays, Columns, or NDJL
- Toggle "First row is header" and "Infer data types" in Options if needed
- Copy or download the JSON result
Use the "Preview" tab to inspect the first 10 rows in a table, or the "Stats" tab to see row/column counts, detected types per column, and file size.
Frequently Asked Questions
Common questions about converting CSV data to JSON format.
What is a CSV to JSON converter?
A CSV to JSON converter transforms comma-separated values data into JSON format. It parses rows and columns from CSV files and outputs structured JSON objects, arrays, or other formats suitable for APIs, databases, and web applications.
How do I convert CSV to JSON online?
Paste your CSV data or upload a CSV file into the input area. The tool automatically detects the delimiter and converts it to JSON in real time. Choose your preferred output format (objects, arrays, columns, or NDJL) and copy or download the result.
Does it handle commas inside CSV fields?
Yes. The tool uses RFC 4180 compliant parsing, which correctly handles quoted fields containing commas, newlines, and escaped quotes. For example, "New York, NY" in a quoted field is parsed as a single value, not split into two columns.
Does it detect data types automatically?
Yes. When type inference is enabled, the tool automatically converts numeric strings to numbers, "true"/"false" to booleans, and empty values to null. You can toggle this off to keep all values as strings.
Is this CSV to JSON converter free?
Yes, completely free with no signup, no file size limits, and no ads. All processing happens in your browser, so your data never leaves your device.
How to convert a CSV file to JSON
Step-by-step guide to converting CSV data to JSON format.
- Open the CSV to JSON converter at limeconvert.com/csv-to-json
- Paste your CSV data or drag and drop a .csv file onto the input area
- The tool auto-detects the delimiter and parses the data
- Choose your output format: Objects, Arrays, Columns, or NDJL
- Copy or download the JSON result
How to convert semicolon-delimited CSV to JSON
Convert European-style semicolon CSV files to JSON.
- Open the CSV to JSON converter
- Paste or upload your semicolon-separated CSV data
- The auto-detect feature will recognize the semicolon delimiter
- If not detected, select semicolon from the delimiter options in the toolbar
- Copy the resulting JSON output
