Validate OpenAI batch requests, n8n logs or NDJSON streams before they enter a data pipeline.
Never paste production passwords, live JWT access tokens or private customer records.
No uploads, cookies, tracking or third-party scripts. Your input stays in browser memory.
Ready. Enter a test value.
A file can contain individually valid JSON objects separated by newlines but fail as one JSON document. JSONL requires one parseable JSON value per nonempty line; a stray comma or newline inside a record can break a batch. This tool identifies the exact lines and exports a standard JSON array when all lines pass.
Paste a few fictional NDJSON lines, then click Validate. Inspect line-specific errors, record counts and object/array/value types. Export JSON only when validation succeeds. For CSV/JSON table conversion, the separate free LocalCSV Lab tools may be more suitable.
This is a syntactic parser only; it does not verify OpenAI Batch schema, n8n node types or business-level data correctness. It doesn't submit your rows to any API. Avoid huge or sensitive production dumps in any third-party page.
JSONL has one complete JSON value per line. A JSON array encloses all records in [ ] with commas; this validator can produce an array only if every nonblank line parses.
It checks JSON syntax by line only, not request shape, model access or API eligibility.
No. Pasted text is parsed and converted on your device, and the download is generated locally.