Excel Merge
Combine multiple spreadsheet files into one workbook (sheets or rows)
Drag & drop files here
or browse files
Pick multiple spreadsheet files at once; you can add more afterwards
About this tool
Twelve monthly reports, per-store exports, forms filled in by teammates - sooner or later they all need to become one file. This tool merges multiple .xlsx / .xls / .csv files into one workbook: by default each file becomes its own worksheet, or pick append mode to stack every row into a single sheet.
Append mode can skip the header row of each file so column names do not repeat every few dozen rows. File order is adjustable. Conversion runs locally in your browser - table data is never uploaded.
Features
- Mix .xlsx / .xls / .csv inputs freely
- Default mode: one worksheet per file, named after it
- Append mode stacks rows with optional header skipping
- Reorder files with up/down buttons
- Free, unlimited, local merging
How to use
- Drop multiple spreadsheet files at once (add more anytime)
- Reorder them with the ↑ ↓ buttons
- Pick the merge mode (per sheet / append)
- Click Merge and download merged.xlsx
Frequently asked questions
- Columns do not line up across files - now what?
- Per-sheet mode keeps files independent; append mode concatenates rows as-is and pads shorter rows with blanks. For strict column alignment, normalize column order in the sources first.
- Do headers repeat in append mode?
- With "skip header row of each file" checked, only the first file keeps its header and later ones are skipped; unchecked, every header row is kept.
- Can CSV files merge together with xlsx?
- Yes - all three formats are processed in the chosen order, and CSV files get automatic encoding detection (UTF-8 / GB18030).
- Are styles or formulas preserved?
- Per-sheet mode keeps original cell values (styles not guaranteed); append mode is value-based with numbers written as text to protect long IDs. Formulas are stored as their calculated values.