Merge Excel Files Online — Free
Combine two or more CSV, XLS or XLSX files into a single spreadsheet — entirely in your browser, nothing uploaded, nothing stored.
Accountants and e-commerce sellers routinely need to combine monthly sales reports, GST data exports, or inventory sheets from multiple sources into one file for reconciliation. Copy-pasting rows between spreadsheets is slow and error-prone — a mismatched column or an accidentally-skipped row can throw off totals silently. This tool reads every file's actual header row, aligns matching columns automatically, and produces one clean merged file in seconds.
Common uses: combining monthly Amazon/Flipkart/Meesho sales reports into one annual file, merging TCS reports across periods, or consolidating purchase data from multiple vendors before reconciliation.
Frequently Asked Questions
Does this upload my files anywhere?
No. Every file is read and merged inside your own browser using JavaScript — nothing is sent to a server. You can even disconnect from the internet after the page has loaded and it will still work.
Do the files need identical columns?
No. The merged file's header row is built from every column found across every file you upload. If one file is missing a column another file has, that cell is simply left blank for those rows — nothing is misaligned or dropped.
What file types are supported?
CSV, XLS, and XLSX. You can mix formats in the same merge — for example, combine two XLSX exports with one CSV export in a single pass.
Is there a limit on how many files or rows I can merge?
There's no artificial limit imposed by this tool. In practice you're bounded by your browser's available memory, since the merge happens in-memory on your device — for typical sales-report or GST-data sized files (thousands to tens of thousands of rows), it runs in well under a second.
Will merging change my data or formatting?
Cell values are preserved as read from each source file. This tool focuses on combining rows correctly, not preserving cell styling, formulas, or conditional formatting — the output is a clean data sheet, not a formatted report.