Convert JSON to CSV in Seconds
Paste a JSON array or upload a .json file, flatten nested keys, pick the columns you need, preview the result, and download a clean CSV. Everything runs in your browser.
1. Load your JSON data
Drag & drop a .json file, or click to browse
Maximum recommended size: 100 MB
2. CSV options
3. Choose columns
Load data to see available columns.
4. Preview & export
Your CSV preview will appear here after parsing.
Local-first privacy
Your JSON never leaves the browser. There is no server upload, no tracking of file contents, and no data retention.
Nested key flattening
Complex nested objects are automatically expanded into dotted columns. Keep arrays as JSON text or expand them by index.
Column control
Search, select, deselect, and invert columns with a single click. Export only the fields you actually need.
Frequently asked questions
Is Cvon free to use?
Yes, Cvon is completely free. The JSON-to-CSV converter, AI chat, and CSV editor are all available at no cost.
Is my data uploaded to any server?
No. All conversion, editing, and AI chat history happens locally in your browser. Your files and API keys never reach our servers.
Can I flatten nested JSON objects?
Yes. Cvon can flatten nested objects into dotted columns, and you can choose the separator and how arrays should be handled.
How does the AI chat work?
You provide your own OpenRouter API key. The chat sends requests directly from your browser to OpenRouter, so your key stays under your control.
Can I edit cells before exporting CSV?
Yes. After loading your JSON, click any cell in the preview table to edit its value. You can also open results in the full CSV editor.
About Cvon
Cvon is a free, privacy-first JSON-to-CSV converter created by Acetix.xyz, a single home for free, privacy-first web tools — no accounts, no uploads, no noise. Our goal is to make data conversion simple and secure: everything runs in your browser, so your sensitive data never passes through our servers.
Whether you need to flatten nested JSON, select specific columns, clean data with AI, or edit CSV rows by hand, Cvon gives you the tools to do it locally. Learn more about us at Acetix.xyz/about. For questions or feedback, email us at Acetix.team@gmail.com.