File Converter

Convert data files in the browser. We support JSON arrays and objects, CSV or TSV spreadsheets, and plain text lists. Everything runs locally, so your information never leaves your device.

Upload a file

Up to 5 MB. Nested objects are encoded as JSON inside cells. Duplicate headers and uneven rows are rejected.

Or paste your content

Detected format

Convert to

File name

We’ll use this name for the converted download.