Merge tables
Append CSV and XLSX tables or deduplicate them by a shared key column in an isolated local worker.
ready
Processing runs on your device.
Frequently asked questions
Which files can I merge?
CSV and XLSX files. The first worksheet of an Excel file is used, and every file keeps its selected order.
How does deduplication work?
Choose a column present in every file. For identical key values, the last complete row in the selected order is kept.
Are large tables uploaded?
No. An isolated worker reads and merges everything locally. A CSV preflight plus limits of 16 MB per file and 32 MB combined and ZIP expansion, row, column, cell and 64 MB CSV output caps protect device memory. Possible spreadsheet-formula prefixes are neutralized with an apostrophe on export.