Convert JSONL to CSV

Convert JSONL to CSV in your browser. Paste line-delimited JSON, extract fields, and export clean CSV with headers. Works instantly and safely offline.

Paste your input above or import a file below.
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Supported file types: .jsonl, .txt, .json
Total characters: 0
Options
Skip invalid lines
Maximize output

How to Use:

  • Paste your JSONL input into the Input JSONL box or import a .jsonl, .json, or .txt file using Choose File
  • Toggle Skip invalid lines to ignore lines that can’t be parsed as valid JSON
  • Use Maximize output to enlarge the output area for easier review and copying
  • Click Convert or just edit the input output updates live and flashes when refreshed
  • Use Copy Output to copy the CSV to clipboard or Export to File to download it
  • Press Clear All to reset the tool, including input, output, and toggles

What Convert JSONL to CSV can do:

Convert JSONL to CSV reads newline-delimited JSON data (where each line is its own JSON object) and transforms it into a standard CSV format. It automatically extracts keys from the objects to form the header row, fills in missing values as blanks, and optionally skips malformed lines. If your JSONL data contains nested fields or arrays, it handles them as-is unless flattened. Everything runs in the browser with no server, no install, and no risk of leaking data.

Example:

Input:

{ "name": "Alice", "age": 30, "city": "London" }
{ "name": "Bob", "age": 25, "city": "Paris" }
{ "name": "Charlie", "age": 35, "city": "New York" }

Output:

name,age,city
Alice,30,London
Bob,25,Paris
Charlie,35,New York

Common Use Cases:

This tool is ideal for working with exports from APIs, logging systems, or big data tools that provide newline-delimited JSON. It helps developers, analysts, and engineers convert JSONL into structured CSV for use in Excel, Sheets, databases, or analysis pipelines without writing scripts or using third-party tools.

Useful Tools & Suggestions:

If you’re working with nested data, Flatten a JSON Object can simplify it before converting. And once it’s in CSV, Convert CSV to JSONL gets you right back if you need to reverse the format.

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