Upload dataChoose an Excel workbook or CSV file.
Data transformer
Clean and reshape spreadsheet data without formulas.
Upload Excel or CSV, apply practical cleanup actions, compare the original and transformed data, then download a clean workbook.
🔒 Temporary and private
Drop your spreadsheet hereExcel or CSV up to 10 MB
Before and after
01
02
03
Turn inconsistent rows into dependable spreadsheet data.
Remove duplicates, trim spaces, normalize dates, fix text case, convert numeric text, and reshape columns while reviewing every change.
Apply transformationsSelect cleanup actions and configure the affected columns.
Review and exportCompare before and after, then download Excel or CSV.
Before
| Name | City | Revenue |
|---|---|---|
| john smith | new york | $ 1,250 |
| ANNA LEE | Boston | 980 |
| ANNA LEE | Boston | 980 |
→
After
| Name | City | Revenue |
|---|---|---|
| John Smith | New York | 1250 |
| Anna Lee | Boston | 980 |
Common transformations
XL
workbook.xlsxReady
Data loaded
01
Choose transformations
Apply one or more actions. You can undo everything at any time.
02
Transformation options
Choose which columns and settings to use.
03
Before and after preview
Review the first rows before downloading the transformed file.
Clean, normalize, split, merge, and reshape spreadsheet data before the next step.
Compare source and transformed data side by side, apply practical operations, and export a separate workbook without changing the original.
1,240Rows processed
4Operations
0Source changes
| Original value | Operation | Transformed value | Status |
|---|---|---|---|
| new york | Trim + Proper Case | New York | Ready |
| smith, alex | Split name | Alex | Smith | Ready |
| 07/12/26 | Normalize date | 2026-07-12 | Ready |
The preview reflects the actual conversion workflow: upload, inspect the detected structure, then download a separate output file.
Complete the conversion in three clear steps.
Upload the source file
SheetWise reads the supported structure and prepares a temporary preview.
Review the detected data
Confirm rows, columns, worksheet selection, and available conversion settings.
Download the separate output
Export the converted file while the original remains unchanged.
Built for real files people move between systems.
CRM and customer-list cleanup
Use a repeatable workflow with preview and separate output instead of rebuilding the process manually.
Finance imports and monthly consolidation
Use a repeatable workflow with preview and separate output instead of rebuilding the process manually.
Operations, inventory, and reporting preparation
Use a repeatable workflow with preview and separate output instead of rebuilding the process manually.
Replace repetitive conversion steps with one guided workspace.
Convert and troubleshoot by hand
Create helper columns, write formulas, copy values, inspect rows, and repeat for every new file.
Preview first and export with confidence
Choose transformations, preview the result, and export a separate cleaned workbook.
Common questions about this converter.
Does Data Transformer overwrite my source file?
No. It creates a separate transformed output.
Can I split and merge columns?
Yes. Supported operations include common reshaping tasks.
Can I preview before exporting?
Yes. Compare source and transformed values before download.
What file types are supported?
The tool supports the spreadsheet and CSV formats shown in the upload workspace.