About excelSplit
Excel shows only the first 1,048,576 rows of a file, and saving it drops the rest. Open the whole export here (CSV, TSV, Parquet or JSON lines, several GB are fine), tick the columns you need, keep only the rows you want, and get Excel files back: one file if it fits now, a file per million rows, a file per month, store or account, or a summary with counts and totals. Dates stay dates and numbers stay numbers. The file never leaves your computer: it's read from your disk and the Excel files are written inside your browser tab. No formulas or SQL needed.
Runs entirely in your browser: your SQL and files are not uploaded. Signed-in members can keep a history of runs and results.
Built on open-source libraries: DuckDB-Wasm, fflate.
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