Combine spreadsheets into one file — columns matched by header, duplicates removed if you want, exported as CSV or Excel. All without your data leaving your device.
Many spreadsheets. One truth.
Sales exports, signup lists, bank statements — combined in your browser, never uploaded.
📊 Drop 2–20 spreadsheet files here, or click to choose
CSV, TSV or Excel (.xlsx) · columns are matched by their header names
Twelve monthly exports that need to be one yearly sheet. Signup lists from three campaigns. Statements from two banks. Combining spreadsheets by hand means copy-paste, misaligned columns and duplicated rows you find weeks later. This merger does it properly: columns are matched by their header names — even when files have them in a different order or one file has extra columns — and exact duplicate rows can be removed automatically, with a count of what was cleaned.
Drop your CSV, TSV or Excel files into the tool above, keep 'First row is a header' checked, and click Merge. Columns are aligned by header name and the result downloads as CSV or Excel — free, nothing uploaded.
Yes — mix .xlsx, .xls, .csv and .tsv files in one merge. Everything is read in your browser and combined into a single sheet.
Yes — leave 'Remove duplicate rows' checked and exact duplicates are removed automatically, with a count shown so you know what was cleaned.
Safer than upload-based tools: your files are processed entirely on your own device and never sent to any server. You can verify by loading the page and switching off your connection.
Everything on AIMerger brings things together — here is what pairs with this one.