JSON → CSV
JSON to CSV converter
convertexa converts JSON files to CSV locally in your browser using a dedicated data engine. Nothing is uploaded: the file is read, converted and handed straight back to you as a download.
- Free, no sign-up
- Nothing is uploaded
- Works offline
- Quality
- Re-encoded
- Runs
- In your browser
- Max input
- 25 MB
- Status
- stable
Drop a file to convert
Everything happens on your device — nothing is uploaded.
or paste with Ctrl+V
How to convert JSON to CSV
- 1 Drop your JSON file here.
- 2 Choose the output format.
- 3 Convert and download the result.
About JSON and CSV
JSON is parsed and re-serialised, so key order is preserved and whitespace is normalised.
CSV is plain text; the first row is treated as the header.
JSON files are read by the convertexa engine that ships with this page, so the conversion is identical whether you use this tool or the general converter. The output is produced with the same codec settings for every visitor, which means the same input always produces the same result.
Limitations
- The top level must be an array of objects; nested objects become empty cells.
Frequently asked questions
How do I convert a JSON file to CSV?
Add your JSON file to the box above. convertexa detects the format from the file content, applies the JSON to CSV conversion and gives you the result to download. The whole operation runs inside your browser.
Are my JSON files uploaded anywhere?
No. The conversion runs in a sandboxed worker on your own device. Your file never leaves the browser, and nothing is stored on a server.
Is the JSON to CSV conversion lossless?
No. CSV is a re-encoded format, so some data is discarded to reach the target format. JSON is parsed and re-serialised, so key order is preserved and whitespace is normalised.
Is there a size limit?
For reliable results keep the input under 25 MB. Very large files run out of memory in the browser rather than failing quietly.
Which browsers are supported?
Any current version of Chrome, Edge, Firefox or Safari on a desktop. The conversion engines need WebAssembly and Web Workers, both of which are standard since 2018.