Convert a List to JSON
Create a JSON array. 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 a List to JSON
- 1. Paste your list. Put one item per line into the input pane, such as a list of tags or values you need represented as a JSON array in a config or API payload.
- 2. Choose Prettify output and Skip empty list items. Turn on Prettify output for a readable, 2-space indented array, or leave it off for a compact single line. Turn on Skip empty list items to drop blank lines from the result.
- 3. Copy the JSON array. Copy the generated array, with each item as a quoted string, into a config file, API request body, or JavaScript source file.
When to use Convert a List to JSON
Convert a List to JSON wraps each line of a plain list into a proper JSON array of strings, with an option to prettify the output or skip blank entries. Reach for Convert a List to JSON whenever a plain text list needs to become a valid array for code or a config file.
- Building a config array from a plain list. You have a list of allowed domains or feature flags and need them as a JSON array in a config file. Convert the list and paste the array directly into the config.
- Preparing a JSON fixture for a test file. A test needs an array of sample string values and you typed them faster as a plain list. Convert to JSON with prettify on for a readable fixture file.
- Sending a list of values in an API request body. You are manually constructing a request body that expects an array field. Convert your plain list to a compact JSON array and paste it into the payload.
- Removing blank lines while converting a form export. A copied list has stray empty lines from formatting and you only want real values in the resulting array. Turn on Skip empty list items before converting.
Examples
List to JSON array
Input
apple banana
Output
[ "apple", "banana" ]
About the Convert a List to JSON tool
Convert a List to JSON is a free online tool that works entirely inside your web browser. Create a JSON array. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 114 List utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
You can shape the output with 2 settings, including Prettify output (2-space indent) and Skip empty list items, and the result refreshes the moment you change one. A worked example further down the page shows exactly what the tool produces for a real input.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Does Convert a List to JSON 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.