Add Percent of Total to Arrow Files Online
Add a percentage-of-total column to Arrow files directly in your browser. Show each row's share of the grand total, or the share within each group — no upload required.
Drop your .arrow file here
or click to browse — max 50 MB
Frequently Asked Questions
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.
Related Tools
Convert CSV to Arrow Online
Convert CSV files to Arrow format directly in your browser. No upload required — your data never leaves your device.
Convert Parquet to Arrow Online
Convert Parquet files to Arrow format directly in your browser. No upload required — your data never leaves your device.
Convert JSON to Arrow Online
Convert JSON files to Arrow format directly in your browser. No upload required — your data never leaves your device.
Convert NDJSON to Arrow Online
Convert NDJSON files to Arrow format directly in your browser. No upload required — your data never leaves your device.
Convert TSV to Arrow Online
Convert TSV files to Arrow format directly in your browser. No upload required — your data never leaves your device.