Converter
Convert CSV to JSON Online
Upload your CSV file. We fix encoding issues, parse the data, and give you clean, valid JSON. Download or copy to clipboard — all processed locally in your browser.
How CSV to JSON conversion works
Upload CSV
Drop your CSV file. We auto-detect encoding, delimiter, and format.
Auto-Fix & Parse
We fix broken encoding, quotes, BOM markers, and whitespace issues.
Download JSON
Get clean JSON — each row becomes an object with column headers as keys.
Frequently asked questions
How do I convert CSV to JSON?
Upload your CSV file to Structra. We automatically parse, fix any encoding or formatting issues, and convert each row into a JSON object with column headers as keys. Click 'Download JSON' to get the file.
What format is the JSON output?
The output is a standard JSON array of objects. Each CSV row becomes a JSON object where the keys are the column headers and values are the cell contents as strings. The output is pretty-printed with 2-space indentation.
Is my data safe?
Your file never leaves your browser. Structra processes everything client-side using JavaScript. We have zero access to your data. No servers, no uploads, no cookies.
Can you handle messy CSV files?
Yes. Before converting to JSON, we automatically fix encoding errors (UTF-8, Windows-1252, Latin-1), wrong delimiters (semicolons, tabs, pipes), broken quotes, BOM markers, and empty rows. You get clean JSON even from broken CSV.
Is there a file size limit?
The free version handles files up to 50MB. Since everything runs in your browser, performance depends on your device. Most files under 10MB convert in under 1 second.