Tool overview
What is JSONL Validator?
A JSONL Validator is a tool that helps you validate newline-delimited JSON with per-line error reports.
Why use JSONL Validator?
It improves readability and workflow speed when you need to validate newline-delimited JSON with per-line error reports—entirely in your browser with no server uploads.
Key Features
Instant syntax highlighting and error catching, client-side privacy, and one-click copy for jSONL Validator workflows. Validate newline-delimited JSON with per-line error reports
How to Use
Follow these steps to get accurate results from the tool interface above.
- Paste newline-delimited JSON (one value per line).
- Run Process to validate every row—errors cite line numbers.
- Review the report panel for valid line counts and failure details.
- Copy clean lines or pipe valid records into CSV/JSON tools.
JSONL Syntax Reference
NDJSON rules for streaming JSON records.
| Feature / Context | Valid Syntax Example | Common Pitfall / Invalid Example |
|---|---|---|
| One JSON value per line | {"id":1}
{"id":2} | [{"id":1},{"id":2}]JSONL is not a JSON array—each line must stand alone. |
| No trailing commas | {"a":1} | {"a":1,}Trailing commas invalidate individual lines. |
| Blank lines | {"id":1}
{"id":2} | {"id":1}
undefinedBlank lines are skipped; non-JSON text fails validation. |
Frequently Asked Questions
Expandable answers for common debugging bottlenecks and data privacy questions.
Official Documentation & References
Authoritative specifications and platform documentation for this utility.