Convert a text list to JSON array (trim, empty lines, quick checks)

What a “good” JSON array looks like

A JSON array is a list of values wrapped in brackets: ["a","b","c"]. For lists, the safest choice is an array of strings. Keep it predictable: one line → one string element.

Cleaning rules that prevent surprises

• Trim leading/trailing whitespace.
• Ignore empty lines (they rarely mean “empty string”).
• Optional: deduplicate if your downstream consumer expects unique values.

Where lists come from

You might copy from spreadsheets, docs, or logs. Those sources often introduce invisible whitespace or empty rows. A local converter that trims and drops empty lines saves debugging time.

Practical checklist (fast)

If you’re stuck, use this quick checklist to narrow the problem before you try “random fixes”. Start by validating the input format (syntax first), then confirm shape expectations (array vs object, headers vs rows). Convert a small sample, inspect the output, and only then export the full result.

• Validate: confirm the input is strict JSON/XML/CSV (no stray characters).
• Confirm shape: arrays vs objects; headers vs row lengths; repeated tags vs arrays.
• Test a sample: first 20–50 rows/items are enough to detect parsing issues.
• Export: copy/download the output and re-check it in the consumer (script/spreadsheet/API).

This workflow is privacy-first by design: All processing happens locally in your browser. Files are never uploaded.

FAQ

Should I keep numbers as numbers? Only if you’re sure. Strings are safer for IDs because leading zeros matter.

Is it safe to convert keyword lists online? Keyword research can be sensitive—use no-upload tools.

Trust note: All processing happens locally in your browser. Files are never uploaded.

Local verification snippet

Run a quick local check before export/convert:

const text = input.trim();
const value = JSON.parse(text);
console.log(Array.isArray(value) ? 'array' : typeof value);