JSON to CSV Converter
Paste JSON, get clean CSV — or flip it and turn CSV back into JSON. Convert, copy, or download, all without leaving your browser.
How to use the JSON/CSV converter
- Choose a direction: JSON to CSV or CSV to JSON.
- Paste your data. JSON should be an array of objects; CSV should have a header row.
- Click Convert. Errors are explained in plain language, not cryptic codes.
- Copy the result or download it as a file.
Moving data between formats
JSON and CSV are the two lingua francas of data, and converting between them is a daily chore for developers, analysts, and marketers. APIs speak JSON; spreadsheets speak CSV; and every data pipeline eventually needs a translator. Going JSON to CSV, this tool collects every key across all objects as column headers, so ragged data with missing fields still converts cleanly — empty cells where a field is absent. Fields containing commas, quotes, or line breaks are properly quoted and escaped per the CSV standard, so the output opens correctly in Excel and Google Sheets instead of exploding into extra columns. Going the other way, quoted fields are parsed properly and the header row becomes your object keys. Because conversion happens locally, you can safely convert API responses containing real customer data without sending it to some random website.
Frequently asked questions
What JSON shape does it accept?
An array of objects works best, e.g. [{"a":1},{"a":2}]. A single object is also accepted and becomes a one-row CSV.
What about nested objects or arrays inside my JSON?
Nested values are converted to compact JSON strings inside their cell, so no data is lost. Truly flat data converts most cleanly.
Will the CSV open correctly in Excel?
Yes. Fields with commas, quotes, or line breaks are quoted and escaped to the CSV standard, and output is UTF-8.
Is my data uploaded anywhere?
No. Conversion runs entirely in your browser — safe for API keys, customer records, and anything else sensitive.