Data rarely arrives in the format you need. These converters translate between spreadsheets, JSON, columnar files, map formats and media, without uploading anything.
Every converter here runs locally in your browser. A customer export, a survey spreadsheet or an unreleased animation is parsed on your own machine and never sent to a server, which makes these tools suitable for files you would not paste into a random website.
Choose CSV or JSON for quick exchange and human inspection, Parquet when you need small, typed files for analytics, and GeoJSON or KML when the data has coordinates. Check the delimiter, encoding and header row before converting, since most conversion problems start there.
Use CSV to JSON or JSON to Parquet when moving data into a pipeline, Parquet to CSV when a colleague needs to open columnar data in a spreadsheet, GPX to GeoJSON or Shapefile to GeoJSON when a GPS track or GIS layer needs to work on the web, and the SRT/VTT or Lottie converters when subtitles or an animation need to match a different platform's expected format.