Bin Column in Parquet Files Online

What is the difference between equal-width and custom bins?

Equal-width bins divide the full range of values into N intervals of identical size — for example, 0–20, 20–40, 40–60. Custom bins let you specify exact breakpoints that match your domain — for example, age groups 0–18, 18–35, 35–65, 65+.

What happens to null values in the column I am binning?

Null values are not matched by any CASE WHEN condition and result in a null in the bin column. You can fill nulls before binning using the Fill Empty Values tool if you need every row to have a bin label.

Can I bin a Parquet file column with negative numbers?

Yes. Equal-width bins handle negative numbers correctly — the range spans from the minimum to the maximum value in the column regardless of sign. For custom edges, include negative values in your comma-separated edge list.

Is my data private?

Yes — completely. Your file is never uploaded to any server. Everything runs locally in your browser using WebAssembly — processing happens entirely inside your tab. Once you close the tab, nothing is retained.

What is the maximum file size?

The free limit is 50 MB. For larger files, performance depends on your device's available memory — most modern machines handle 500 MB to 1 GB comfortably.