frogConvert

CSV files

Comma-separated values: one table, one type, no formatting and no formulas. Its simplicity is the reason it is universal and the reason it loses everything a spreadsheet adds.

Extension
.csv
MIME type
text/csv
Category
data
Can convert from
Yes, via the built-in JSON converter, Pandoc, SQLite
Can convert to
Yes, via the built-in JSON converter, SQLite

Convert CSV to another format

Convert another format to CSV

Converting CSV files privately

frogConvert runs the conversion engines in your browser as WebAssembly, so a CSV file is read, converted and saved without ever being sent anywhere. That matters most for the files people are least willing to upload: contracts, medical records, unreleased work, anything under an NDA.

It also means the converter works offline. Once the page has loaded, you can turn off the network and keep converting.

Common questions

Can I open a CSV file without installing anything?
Yes. frogConvert reads CSV files directly in the browser and converts them to a format you already have software for. Nothing is installed and nothing is uploaded.
Are my CSV files uploaded to a server?
No. Every conversion runs locally in your browser through WebAssembly. There is no server to send files to, and the app keeps working with the network disconnected.