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Data Sparrow
Local-first • uploads need consent

Data Sparrow

Known boundaries

Data Sparrow works with tables, but it is not a full spreadsheet editor or an online database. Very large files may be too big for a device.

File size and memory

Limits depend on your browser and device. A large file or a task that creates many rows can run out of memory. When available, the app may offer a smaller sample or ask permission to process the file online. It never uploads silently.

Spreadsheet features

Spreadsheet imports use cell values and saved formula results only. Formulas, macros, formatting, charts, links, and embedded objects are not run or preserved. Some older spreadsheet types can be opened but not downloaded in the same format.

Automatic detection can be wrong

The app may guess the wrong column type, separator, heading row, text encoding, or date order. Review the file settings before making changes.

Hiding sensitive data

Hiding or replacing values can reduce exposure, but it does not guarantee that people cannot be identified. Consider the other information in the file and who will receive it.