Convert JSONL to CSV
Convert a JSONL (JSON Lines) file to a CSV file. Runs entirely in your browser, so your data never leaves your device.
0 chars · 0 lines
Output
The result appears here as you type.
How to use Convert JSONL to CSV
- 1. Paste your JSONL. Paste newline-separated JSON objects into the input pane, one object per line. Every key seen across the objects is collected to build a consistent set of columns.
- 2. Choose whether to include a header row. Turn on Header row to write the collected key names as the first line of the output. Leave it off if the destination tool expects data rows only.
- 3. Copy the CSV output. Copy the resulting comma-separated rows and paste them into a spreadsheet to sort, filter or chart records that were previously stored as line-delimited JSON.
When to use Convert JSONL to CSV
Convert JSONL to CSV flattens JSON Lines records into ordinary spreadsheet rows, gathering every key across the file into a shared header. It's the reverse direction from a log export or dataset that arrives as one JSON object per line.
- Analyzing a log export in a spreadsheet. A monitoring tool exported events as JSON Lines, but you want to filter and pivot the data visually. Converting to CSV opens it up to any spreadsheet application.
- Reviewing machine learning dataset examples. A JSONL file of training examples needs a quick sanity check for missing fields or bad labels. Converting to CSV makes it scannable in rows and columns instead of raw JSON.
- Reporting on bulk-exported database records. A document database's bulk export is line-delimited JSON. Converting it to CSV lets a non-technical stakeholder open the data directly in a spreadsheet for a report.
Examples
Lines become rows
Input
{"name":"Ada","age":36}
{"name":"Grace","age":45}Output
name,age Ada,36 Grace,45
About the Convert JSONL to CSV tool
Convert JSONL to CSV does its work locally, right in the browser. Convert a JSONL (JSON Lines) file to a CSV file. There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the CSV Tools collection on EditSafely, a set of 133 small, focused CSV utilities that share the same instant, private workspace.
You can shape the output with the Header row setting, and the result refreshes the moment you change it. A worked example further down the page shows exactly what the tool produces for a real input.
Running locally also makes the tool fast and dependable: results appear as you type or drop a file, there is no server outage that can take it down mid-task, and confidential data can be processed without a second thought.
Frequently asked questions
Does Convert JSONL to CSV cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.