2026-07-23
How to Merge Multiple Excel Files Without Losing Formatting
There are two genuinely different ways to merge spreadsheets, and they trade off differently.
'Merging Excel files' can mean two very different things: keeping each file as its own sheet in one workbook, or combining every file's rows into a single unified table. Which one preserves formatting depends entirely on which mode you use.
Two different merge modes
RowMint's Merge Excel Files tool offers 'separate sheets' mode and 'combine' mode. Separate sheets mode keeps each input file as its own sheet inside one output workbook — it reuses the original sheet data directly rather than rebuilding it from scratch, so formatting carried in the original file is preserved to the extent the underlying file format supports it.
Combine mode is different: it reads every file's rows into plain values and rebuilds a single flat table from scratch. This is exactly what you want when you need one unified dataset — but any cell formatting, colors, or number formats from the source files are not carried over, since the output sheet is built from raw values, not copied from the originals.
Which mode to pick
If preserving each file's original look matters — different departments' formatted reports, for example — use separate sheets mode and keep them as distinct tabs. If you need to analyze, filter, or pivot across every row as one dataset, use combine mode and accept that formatting resets to plain values.
There's no single 'correct' choice — it depends on whether you need the files to stay visually distinct or need the data unified for analysis.
Tools used in this guide
FAQ
Does combine mode require identical column headers across files?
It uses the first file's header row as the combined header and appends every other file's data rows beneath it — files should share the same column structure for the result to make sense.
Can I reorder files before merging?
Yes — you can reorder the file list before running the merge, which matters for combine mode since the first file's header becomes the output header.
Does either mode modify my original files?
No — both modes read your files and produce a new output workbook; nothing is changed in the files you uploaded.