JSON to CSV Converter Free Online
Convert JSON to CSV with nested flattening, column selection, delimiter options, and privacy-safe local processing. Paste JSON, adjust columns, and export clean CSV instantly.
No uploads. Everything runs locally in your browser.
What is this tool
This JSON to CSV converter transforms JSON objects or arrays into structured CSV you can open in spreadsheets, BI tools, or databases. It flattens nested objects with dot notation, keeps arrays readable, and discovers all keys across records so mixed or irregular objects still align into a consistent header. Because everything runs locally in your browser, sensitive API responses, analytics exports, or app logs stay private鈥攏o uploads or servers involved.
CSV remains one of the fastest ways to move data into Excel, Google Sheets, databases, or analytics pipelines. This tool preserves first-seen column order, lets you include or exclude columns, reorder them, and rename headers, so the CSV you download matches the shape you need. Delimiter controls (comma, semicolon, tab) make it easy to adapt for regional Excel settings or downstream parsers.
It handles boolean, number, null, and empty values cleanly, escapes commas, quotes, and newlines, and leaves missing values blank instead of breaking the file. Use it as a privacy-safe alternative to upload-based converters when working with production data, customer exports, or internal telemetry.
How to use
- Paste your JSON or load an example, including nested objects or arrays.
- Choose delimiter (comma, semicolon, or tab) and review detected columns.
- Include/exclude, reorder, or rename headers, then click Convert.
- Preview the table, copy the CSV, or download it as a .csv file.
Features
- Nested JSON flattening with dot notation and readable array values
- Column include/exclude, reorder, and header rename controls
- Delimiter options: comma, semicolon, or tab
- Table preview with row and column counts plus CSV text output
- Copy or download CSV; runs entirely in your browser for privacy
Use cases
- Export API responses to CSV for quick filtering in spreadsheets without writing scripts.
- Flatten nested app data (profiles, addresses, metadata) for analytics or BI tools.
- Prepare CSV for Excel or Sheets from JSON logs, telemetry, or webhook payloads.
- Clean and align mixed JSON records before importing into databases or CRM tools.
- Convert JSON to CSV for data reviews alongside JSON Formatter or compare changes with JSON Diff.
- Transform nested arrays into readable cells for documentation or data handoffs.
- Prepare CSV extracts for teams who prefer table views over raw JSON when triaging bugs.
- Swap delimiters (comma/semicolon/tab) to match locale-specific spreadsheet defaults.
Popular ways to use this tool
- Convert JSON arrays from APIs into CSV for import into Sheets or Excel with one click.
- Flatten nested JSON for CSV while keeping comments and metadata readable in cells.
- Exclude sensitive columns and rename headers before sharing CSV exports internally.
- Reorder columns to match an existing schema and download a ready-to-import CSV.
- Pair CSV output with JSON/YAML/XML Converter or Text to Table Converter when building documentation.
- Parse URL payloads with URL Query String Parser and then align fields in CSV for quick audits.
FAQ
What is a JSON to CSV converter?
It turns JSON data into a CSV file by flattening objects, aligning keys as columns, and outputting rows for each record.
Can this tool convert nested JSON?
Yes. Nested objects are flattened with dot notation and arrays are preserved as readable cell values.
Is my data uploaded anywhere?
No. Conversion runs locally in your browser; nothing is sent to a server.
Can I choose which columns to include?
Yes. You can include/exclude columns, reorder them, and rename headers before exporting.
Can I download the CSV file?
Yes. Copy or download the generated CSV instantly as a .csv file.
Does this work on mobile?
Yes. The layout is mobile-friendly with scrollable previews and tap-ready controls.