JSONL / NDJSON Formatter & Validator
Validate and format JSON Lines (JSONL / NDJSON) data online — line-by-line error reporting, compact and pretty-print modes
JSONL Input
0 lines | 0 valid | 0 invalid
Output
Paste JSONL to validate and format
Frequently asked questions
What does JSONL / NDJSON Formatter & Validator do?
Validate and format JSON Lines (JSONL / NDJSON) data online — line-by-line error reporting, compact and pretty-print modes
What should I check in the result?
Test a small known example and an invalid input. Review generated code or decoded data before using it in a project; inspection alone does not establish correctness or authenticity.