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Lines to JSON

Turn a list of lines or CSV rows into a JSON array with optional headers and type inference.

Turn lines into JSON

Items: 0 · Fields: 0 · Size: 0 bytes
Rows are parsed and typed on your device, and nothing is uploaded.

How to use the Lines to JSON

  1. Paste one item per line or a block of CSV rows.
  2. Pick the input format and decide whether the first row is a header.
  3. Copy the generated JSON array with a single click.

Features

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Frequently Asked Questions

Common questions about the free online lines to json.

Paste one item per line and pick the line format. The tool wraps every line in quotes and returns a JSON array that you can copy.
Yes. Choose the comma or tab format, keep the header option on, and each data row becomes an object keyed by the header names.
It converts values that look like numbers, true, false or null into real JSON types instead of leaving them as quoted strings.
Repeated column names get an underscore appended, so a second name column becomes name_ and no key is ever overwritten.
Missing cells are filled with an empty string, which keeps every object the same shape and avoids undefined values.
The parser keeps each cell intact per line. For heavy quoting needs with embedded commas, split the data first and paste clean rows.
No. Everything is parsed inside your browser, so your lines and rows never leave your device.
Yes. The result is produced with JSON.stringify, so it parses cleanly in any JSON reader or programming language.
Yes. The converter is fully responsive and works on phones, tablets and desktop browsers.
Yes. It is completely free with no account, no sign-up and no cap on how many lines you convert.

Last updated: October 10, 2026