Developer tool
CSV to JSON Converter
Convert CSV files to JSON arrays. Free, private, no data stored.
CSV JSON
PrivConvert
Privacy-first conversion
No files stored
In-memory processing
Deleted instantly
No sign-up needed
Complete the security check to begin
Turn spreadsheet data into structured JSON
Need to feed CSV data into an API, config file, or application? Convert it to a clean JSON array with proper key-value mapping.
- Headers become keys - first row is used as JSON property names
- Clean formatting - output is pretty-printed with 2-space indentation
- Auto encoding - handles UTF-8, Latin-1, and BOM-prefixed files
Frequently Asked Questions
What JSON structure is produced?
The output is a JSON array of objects where each row becomes an object with column headers as keys.
What if my CSV has no header row?
The first row is always treated as headers. If your data has no headers, generic column names will be used as keys.
Are numbers and booleans parsed automatically?
Values that look like numbers or booleans are kept as strings to preserve the original data exactly.
Is this tool really free?
Yes, completely free with no hidden fees, no watermarks, and no sign-up required. You can convert as many files as you need.
Are my files private and secure?
Absolutely. Every conversion runs in an isolated, in-memory process. Your files never touch the disk, are never stored or shared, and are deleted from memory the moment your download is ready.