Convert Excel (XLSX) to CSV Online Free
Drop your Excel workbook below to preview, edit, or clean columns, then click "Export Format > CSV Comma (.csv)" (or TSV / Markdown) to download instantly.
Drop XLSX, CSV, TSV, Markdown (.md), or JSON here
Runs locally inside browser memory. Multi-sheet workbooks open into tabs automatically.
Combine Two or More Columns
Merge 2+ columns cleanly without writing formulas.
Split Column by Delimiter
Remove Duplicate Rows
Find & Replace
Sort Rows
Filter or Delete Matching Rows
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
Why Use SheetCombine Instead of Online Cloud Converters?
Traditional file conversion websites require you to upload your sensitive spreadsheets to their third-party servers. Your company financial sheets, payroll numbers, and customer email databases sit on unknown servers.
SheetCombine is different. Using WebAssembly and client-side JavaScript, the parsing and conversion happen inside your browser's local sandbox. Your file never travels over the network, ensuring complete confidentiality.
