Frequently asked questions
- Is my data uploaded to a server?
- No. Every operation runs inside your browser using JavaScript. Nothing you paste or open is sent to our servers, stored or logged. You can disconnect from the network after the page loads and the tool keeps working.
- Does it handle commas and newlines inside fields?
- Yes. The reader follows RFC 4180, so quoted fields may contain the delimiter, line breaks and escaped double quotes.
- Are values converted to numbers automatically?
- By default yes: numbers, true, false and empty cells become JSON numbers, booleans and null. Turn type inference off to keep every value as a string.
Related tools
Stuck on an error?
Every common JSON parse error is explained separately, with the cause and the fix: common JSON errors.
How your data is handled
Everything happens on your device. There is no upload, no storage and no logging, and only your interface preferences - theme, indentation, font size and word wrap - are kept between visits. Closing the tab clears the document.