DTNDailyToolNest

Free · No sign-up · On device or on server

Data tools

Tabular data converters for developers, analysts, and operators. Convert CSVs to structured JSON records or flatten JSON arrays into clean CSV tables entirely within your browser.

CSV to JSONTurn a spreadsheet export into JSON.JSON to CSVTurn JSON records into a spreadsheet you can open in Excel.

Protect customer and internal data

Never paste customer data, internal analytics, or financial exports into untrusted cloud converters. DailyToolNest converts data client-side in memory with Papa Parse and native JSON streams.