Check every nonblank line as its own JSON value. This validation-only tool reports line numbers and errors; it does not format, minify, or convert your records.
Validate NDJSON without changing your data. Get a line-by-line report of valid JSON values, invalid records, and skipped blank lines.
Check every nonblank line as its own JSON value. This validation-only tool reports line numbers and errors; it does not format, minify, or convert your records.
{"id":1,"event":"created"}
{"id":2,"event":"updated","active":true}
["heartbeat",1712345678]Checked 3 NDJSON lines: 3 valid JSON values, 0 invalid lines, and 0 blank lines ignored. Showing all 3 line results.
No. The transformation runs in your browser. URL import contacts only the address you explicitly enter.
The editor marks the likely location and keeps stale output out of the result pane.
The report includes record counts and physical line numbers. Invalid records include a likely column. Blank lines are marked as ignored, not valid JSON values.
This checks syntax, not an application schema. Reports show at most 200 line details, prioritizing errors, with a summary of all checked lines. A final newline is a delimiter, not an extra blank record.