Convert CSV to JSON — structured data for apps and APIs
Upload a CSV and instantly convert it to JSON arrays you can copy or download. Ideal for developers, dashboards, and data preparation tasks.
CSV to JSON Converter
How it works
This converter parses your CSV into structured JSON arrays. It is ideal for API payloads, JavaScript apps, dashboards, and data cleaning workflows. Use header mode for clean key-value objects.
- Auto-detect works for most exports; choose semicolon for many EU datasets.
- Header mode outputs an array of objects:
[{"name":"..."}, ...]. - No upload: all parsing happens in your browser.
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Tips & Troubleshooting
These quick notes help you get clean, reliable results with Convert CSV to JSON — structured data for apps and APIs—especially when you’re uploading to forms, emailing files, or preparing documents for submission.
Best results
- Use UTF‑8 encoding when converting CSV/JSON so special characters stay intact.
- Standardize headers before converting—consistent columns prevent broken outputs.
- Export a small sample first to confirm the formatting before converting a large file.
- After conversion, open the output once to confirm columns, dates, and decimals.
Troubleshooting
- If columns shift in CSV, values may contain commas—ensure they are quoted properly.
- If JSON is nested, flattening may be needed before conversion to CSV.
- If dates change formats, set the column format in Excel after import.
- If output looks garbled, re-save your source as UTF‑8 and retry.
Privacy
Privacy note: processing runs locally in your browser. Your files stay on your device unless you choose to download the result.
Related reading
FAQ
Header mode uses the first row as keys. No-header mode generates column names like col1, col2.
This tool keeps values as strings by default to avoid losing formatting. You can convert types later in your code.
Yes. Local-only conversion.