JSONL ⇄ CSV Converter
Convert newline-delimited JSON to CSV rows, or CSV back into JSONL. Works with files up to 200MB.
Or convert a file directly — supports files up to 200MB
Drag & drop a file here, or click to browse
Processed in the background, so the page stays responsive even for huge files
How to use this tool
Paste or upload your file and pick a direction — the result updates instantly as you type. JSONL → CSV reads one JSON object per line and produces a CSV with the first record's keys as headers; CSV → JSONL does the reverse, writing one compact JSON object per row. Handy for prepping datasets for spreadsheet review or for feeding CSV exports into ML/log pipelines that expect JSONL. Nothing leaves your browser.
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