CSV to Excel Converter with Preview and Data Cleanup

Prepare a CSV export for Excel before you download it. Paste or upload data, inspect the parsed cells, remove empty or duplicate rows, transpose the table, and create XLSX entirely in your browser.

Paste or uploadPreview before downloadBlank and duplicate cleanupLocal browser processing

CSV source

Or paste CSV data

DelimiterFile encoding

Parsed and converted locally. The CSV never leaves this browser.

Excel preview

Add CSV data to inspect rows and columns

First row is headersRemove empty rowsRemove duplicatesTranspose table

Your parsed CSV table will appear here.

How to convert CSV to Excel with a preview

Load the source, clean only what you choose, and download a standard XLSX workbook.

Upload or paste CSV data

Drop a .csv file up to 25 MB or paste comma-, semicolon-, tab-, or pipe-delimited records into the text area.

Preview and clean the table

Check the parsed columns, then optionally remove empty rows, remove duplicate records, or transpose rows and columns.

Download for Excel

Create an .xlsx workbook with a frozen header row, filters, and readable column widths, ready for Excel or another spreadsheet app.

CSV import and cleanup controls

This workflow is for CRM, analytics, inventory, and database exports that need inspection before opening in Excel.

Control	Setting	Effect
Input	CSV file or pasted data	Handles downloaded reports and quick clipboard exports
Preview	First 12 rows	Shows delimiter errors and the final table shape before conversion
Empty rows	Optional removal	Drops records whose cells are all blank
Duplicates	Optional removal	Keeps the first identical record while preserving an optional header
Transpose	Optional rows-to-columns	Rotates the table when the source orientation is wrong for Excel analysis

Convert directly or clean CSV for Excel?

Use exact conversion when every source row must remain untouched. Use this page when the Excel-ready table needs visible cleanup first.

Characteristic	Source	Output
Best for	Direct CSV to XLSX conversion	Excel import with preview and cleanup
Source entry	Upload one CSV file	Upload a file or paste CSV text
Row handling	Preserve all source records	Optionally remove blank and duplicate rows
Orientation	Keep source rows and columns	Optionally transpose rows and columns
Privacy	Local browser processing	Local browser processing

Excel-ready output without hidden changes

Every cleanup action is explicit and reflected in the preview, so you can see the resulting row and column count before download.

Preview before Excel

The table preview and row-by-column count make delimiter mistakes visible before an XLSX workbook is created.

Explicit cleanup

Blank-row removal, deduplication, and transposition are off or clearly selected. The tool does not silently rewrite values.

Identifiers remain text

ZIP codes, SKUs, phone numbers, and long IDs keep leading zeros because the workbook does not guess numeric or date types.

No upload or retention

The converter uses the browser's file reader and ExcelJS. There is no server upload, storage period, conversion queue, or account requirement.

Related CSV and XLSX tools

Choose the exact converter for a direct format change, or reverse the workflow to export Excel data as CSV.

CSV to XLSX Converter

Convert an uploaded CSV directly to XLSX while preserving every source row.

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XLSX to CSV

Choose one workbook sheet and export it as clean UTF-8 delimited text.

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Image to Table

Extract table rows and columns from a screenshot or photographed document.

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CSV to Excel converter FAQ

How do I convert CSV to Excel online?

Upload a CSV file or paste the data, verify the preview, choose any cleanup options, and select Download XLSX. Excel can open the resulting workbook directly.

What is the difference between CSV and Excel XLSX?

CSV is plain text containing one delimited table. XLSX is an Office Open XML workbook that supports worksheets, formatting, filters, formulas, charts, and typed cells.

Can I paste CSV into Excel with this tool?

Yes. Paste CSV text into the input area, confirm the parsed table, and download it as XLSX instead of manually using Excel's Text Import Wizard.

Will removing duplicates change my header row?

No when First row is headers is enabled. Deduplication applies to the data records after the header and keeps the first copy of each identical row.

Does the converter change dates, phone numbers, or leading zeros?

No. It writes imported fields as text, avoiding automatic date conversion, scientific notation, and removal of leading zeros. You can assign Excel data types later.

Which delimiters can it import?

It supports comma, semicolon, tab, and pipe delimiters, with automatic detection and a manual override.

Can it open CSV data that uses quoted commas or line breaks?

Yes. The parser supports quoted delimiters, doubled quote escapes, and multiline quoted fields.

Is the CSV data private?

Yes. The file or pasted text is processed locally in the browser and is not uploaded to this site or retained after you close the page.

Does it work without Microsoft Excel?

Yes. Conversion only needs a modern browser. You can open the downloaded XLSX in Excel, Google Sheets, LibreOffice Calc, or Apple Numbers.

What are the conversion limits?

The tool accepts one CSV file up to 25 MB. An XLSX worksheet can contain at most 1,048,576 rows and 16,384 columns, and the browser also needs enough memory for the parsed table.

Prepare clean CSV data for Excel

Paste or upload CSV, inspect the exact result, and download a private XLSX workbook.

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