Question 1

What does each line become in the output?

Accepted Answer

Each non-skipped line becomes one element of the array, in the same order. Paste three lines apple, banana, cherry and you get ["apple","banana","cherry"]. Blank lines are dropped by default so you never end up with empty-string elements, and the order is preserved unless you turn the sort option on, which reorders alphabetically with numeric-aware collation so 10 sorts after 2.

Question 2

Should numbers be converted to a JSON number automatically?

Accepted Answer

That is what the type inference toggle decides. With it on, a line that is exactly a number, true, false or null becomes that JSON primitive, so 42 is the number 42 and true is the boolean true. With it off, every element stays a string, so you get ["42","true"]. Inference is strict: 1abc, 0x10 and a phone number with a leading plus and dashes stay strings, so it will not silently mangle IDs or codes that merely start with digits.

Question 3

How do I remove duplicate lines?

Accepted Answer

Turn on Remove duplicates. The tool keeps the first occurrence of each line and drops every later repeat, comparing the lines after trimming if trim is on. So the four lines a, b, a, c collapse to ["a","b","c"]. Pair it with Sort if you also want the result ordered. Dedupe runs before type inference, so it matches on the text you see, not on the inferred value.

Question 4

How do I split a JSON array back into lines?

Accepted Answer

Switch the direction to JSON array to list and paste your array, for example ["red","green",3,true]. You get one element per line: red, green, 3, true. String elements print without their surrounding quotes so you get plain text back, while numbers, booleans, null and nested objects print as their JSON text. If the JSON is broken, like a missing closing bracket, you get a readable error instead of a blank box.

Question 5

Will my quotes and special characters be escaped?

Accepted Answer

Yes. The output is built with real JSON serialization, so a line containing a double quote, a backslash or a tab is escaped to a valid JSON string and round-trips back to the original text exactly. You do not add quotes yourself; the tool wraps each string element for you. This is the main reason to use the tool instead of hand-typing brackets and commas, where one stray quote breaks the whole array.

Question 6

Is anything sent to a server?

Accepted Answer

No. The split, the type inference, the dedupe, the sort and the JSON serialization are plain JavaScript that runs in your browser tab. Your list never leaves the page and nothing is logged. The one thing to know: the shareable URL encodes your input in the query string, so a share link pasted into chat records that text in the recipient server log. For sensitive lists use the copy button instead of sharing the URL.

List to JSON Array Converter

What this tool does

Tool details

How to use

1. Input

2. Process

3. Copy / Download

How List to JSON Array fits into your work

Conversion jobs

Conversion checks

Good next steps

FAQ

Tool combos

List to JSON Array Converter

What this tool does

Tool details

How to use

1. Input

2. Process

3. Copy / Download

How List to JSON Array fits into your work

Conversion jobs

Conversion checks

Good next steps

FAQ

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