Zero Uploads • Native XLSX Export
Convert CSV to Excel (XLSX) Online Free
Upload your raw CSV below. SheetCombine automatically parses comma, tab, and semicolon-delimited values into an interactive Excel grid. Export to native .xlsx with one click.
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Drop XLSX, CSV, TSV, Markdown (.md), or JSON here
Runs locally inside browser memory. Multi-sheet workbooks open into tabs automatically.
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Zero Uploads
Combine Two or More Columns
Merge 2+ columns cleanly without writing formulas.
Preview
Split Column by Delimiter
Remove Duplicate Rows
Find & Replace
Sort Rows
Filter or Delete Matching Rows
Quick Cleanup:
Fill, Prefix / Suffix & Extract Column
Merge Multiple Files / VLOOKUP Join Sheets
Append rows from multiple files/tabs or join two sheets by a key column.
Option A: Stack / Append All Open Sheet Tabs
Option B: VLOOKUP / Left-Join Two Sheets by Key
Format Preview & Export Converter
Column Profiler & Quick Summary
| Col | Header | Filled | Blank | Unique | Dupes | Min / Max / Avg |
|---|
Paste CSV, TSV, Markdown Table, JSON, or HTML
Confirm Action
Fixing Broken Leading Zeros and Date Formats in CSV
When opening CSV files in Microsoft Excel directly, Excel often strips leading zeros from ZIP codes (e.g. 02134 becomes 2134) or distorts date formats.
SheetCombine preserves text strings as raw values, ensuring your SKU numbers, phone numbers, and international postal codes stay intact before saving to an .xlsx workbook.
