CSV to JSON Converter – Free Online Tool
Convert CSV files or pasted text into structured JSON objects or arrays in seconds. Our free CSV to JSON Converter handles headers automatically and supports any delimiter.
The Challenge
You exported data from a spreadsheet or database as CSV but your application needs JSON. Manually restructuring the data means adding quotes, commas, and braces for every row. This tool parses your CSV and converts it to a JSON array of objects using the header row as keys.
Input Support:
- • Comma-separated values
- • Semicolon delimiters
- • Tab-separated values
- • Pipe-delimited files
Features:
- • Auto-detect delimiter
- • Type inference
- • Quote handling
- • File upload support
Conversion Steps
Paste CSV
Enter CSV data or upload a file
Configure
Set delimiter and output format
Convert
Get JSON array output instantly
About CSV to JSON Converter
CSV files from spreadsheets and databases need to become JSON for web applications. This converter handles the transformation automatically, detecting delimiters and converting data types. Export your CSV data as JSON arrays or objects keyed by the first column.
How the conversion works
Paste your CSV data in the input box. The tool auto-detects the delimiter or you can specify it manually. Choose your output format: array of objects or object keyed by first column. Click Convert and the CSV becomes structured JSON.
The first row is treated as headers. Values are converted to appropriate types: numbers become numbers, true/false become booleans. Empty cells become null. Use Copy or Download to export the result.
When you'd use this
You exported data from Excel or a database and need it in JSON format for your app. Or you're importing spreadsheet data into a web application. This tool also helps when migrating from legacy systems that use CSV.
CSV has limitations compared to JSON. It can't represent nested structures or arrays within cells. For complex data, consider exporting directly to JSON from your source system.
Questions
Does this handle quoted fields?
Yes, CSV fields with commas or newlines should be quoted. The parser handles standard CSV quoting correctly.
What delimiters are supported?
Comma, semicolon, tab, pipe, and custom delimiters. Auto-detect usually figures it out from your data.
How are data types handled?
Numbers and booleans are auto-converted. Strings stay as strings. Empty values become null in the JSON output.
Can I convert JSON back to CSV?
Yes, use our JSON to CSV tool for the reverse conversion. Flat JSON arrays convert best to CSV format.
What about CSV files with no headers?
The first row is always treated as headers. Add a header row to your CSV or use array output format.