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NDJSON to JSON

Convert newline-delimited JSON to a pretty JSON array in your browser. Combine NDJSON records into one array instantly, with no upload.

NDJSONJSON array

Runs entirely in your browser — nothing you enter is uploaded or stored.

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NDJSON to JSON

Convert newline-delimited JSON to a pretty JSON array in your browser. Combine NDJSON records into one array instantly, with no upload.

Paste your ndjson on the left and the result is produced instantly — entirely in your browser. Your data never leaves the page, which you can confirm from the Network panel or our privacy policy.

Frequently asked questions

How do I use the NDJSON to JSON?

Paste or type your ndjson on the left and the json array appears on the right — copy or download it. Everything runs in your browser.

Is my data uploaded anywhere?

No. This tool runs entirely in your browser — your input is never sent to a server. You can verify it in the Network tab or in our Content-Security-Policy.

Is the NDJSON to JSON free?

Yes — completely free, no sign-up and no limits. Everything happens client-side.

NDJSON to JSON

Frequently asked questions

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