Validate your JSON Lines data instantly - 100% client-side, secure, and fast. Check syntax, detect errors, and ensure data integrity.
Total Lines
0
Valid Lines
0
Error Lines
0
Success Rate
0%
Your data never leaves your browser. All validation happens locally for maximum security and privacy.
Validate thousands of lines instantly with optimized JavaScript parsing and error detection.
Get precise line numbers, error types, and helpful messages to fix issues quickly.
Optionally check that all records have consistent field names for data integrity.
Find duplicate ID values across your dataset to ensure data uniqueness.
Download valid lines or error reports for further processing or debugging.
Paste JSONL text, upload a file, or load an example dataset to begin validation.
Each line is parsed independently as JSON, catching syntax errors with precise line numbers.
Optional schema consistency and duplicate ID detection run on valid records.
Review statistics, error details, and download clean data or error reports.
This validator runs 100% in your browser using JavaScript. Your JSONL data is never uploaded to any server, ensuring complete privacy and security. Perfect for sensitive or proprietary data.