JSON Lines Viewer / NDJSON Viewer
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What is a JSON Lines / NDJSON Viewer?
A JSON Lines viewer helps you inspect newline-delimited JSON where each line contains a separate JSON object.
It is useful for logs, exports, event streams, API dumps, analytics files, and converting NDJSON into a standard JSON array.
How to use the NDJSON Viewer
- Paste JSON Lines or NDJSON into the input field.
- Choose whether to skip empty lines and pretty-print the output.
- Click Parse NDJSON.
- Review the table view and copy the JSON array if needed.
Tips
- Each line in NDJSON should be valid JSON on its own.
- Skipping empty lines helps when logs contain blank separators.
- The JSON array output is useful when another tool expects standard JSON instead of NDJSON.
- Invalid line numbers make debugging broken exports much easier.
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NDJSON checks before loading newline-delimited data
NDJSON is useful for logs, exports, and streams, but each line must be valid JSON and schema drift can hide inside large files.
Validate every line
Treat each newline as a separate JSON document and fix partial lines, trailing commas, or pasted array wrappers before import.
Watch schema drift
Compare fields across rows so missing keys, renamed properties, and mixed value types do not break downstream processing.
Handle large exports
Use sampling for quick inspection, then validate representative chunks when files come from logs, queues, or analytics pipelines.
Convert deliberately
When converting to a JSON array, confirm that consumers can handle the full memory size and expected object shape.
Privacy and usage
Built for quick checks without an account
Toolinix tools are designed for short developer tasks: paste a safe sample, inspect the result, copy what you need, and move on.
No login required
You can use the tools without creating an account, subscribing to a newsletter, or saving a workspace.
Local when possible
Formatters, generators, encoders, and text utilities generally run in your browser. Network diagnostics may need a server-assisted lookup to check public URLs, domains, or IPs.
Keep secrets out
Do not paste production passwords, private keys, access tokens, customer records, or regulated data into online tools unless your own security policy allows it.
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