Convert CSV to JSON
Convert CSV to a JSON array of objects online — headers become keys, numbers detected, pretty-printed output.
How to use CSV to JSON
The header row becomes the keys and every following row becomes an object in a JSON array — the format seeding scripts, APIs and config files ask for. Numeric detection is optional: on, and "42" becomes 42; off, and everything stays a string, which protects IDs, phone numbers and codes with leading zeros.
- Drop your file into the box above, or click it to browse. You can also paste from the clipboard.
- Adjust the options to taste — the defaults are sensible for most cases.
- Press Process and watch the progress bar; everything runs on your device.
- Download your result — individually, or as a ZIP when there are several files.
Like every tool on ImageCompressorKits, this runs 100% in your browser: your file is never uploaded to any server, which makes it safe to use even with private documents — and it keeps working if you go offline after the page loads.
Frequently asked questions
Should I turn number detection on or off?
On for measurement/analytics data you'll do math on; off whenever columns contain IDs, phone numbers or zero-padded codes, which must stay strings to survive.
What if my CSV has no header row?
Columns are then named col1, col2, … so the structure is still valid JSON, and you can rename keys downstream.
Is this tool really free?
Yes — completely free, with no signup, no watermark, and no file limits beyond what your device's memory can handle.
Are my files private?
Yes. Processing happens locally in your browser via JavaScript; nothing is transmitted or stored. See our privacy policy for the full picture.