How it works
How to use CSV to Excel online
- Choose a CSV file or paste CSV text into the input area.
- Select automatic or explicit delimiter handling and enter the worksheet name.
- Create the XLSX workbook in your browser and download the Excel file.
Data tool
CSV to Excel
Create an XLSX workbook from CSV data.
- Input
- Choose a CSV or text file or paste text
- Output
- Excel files
- Limits
- 1 file · 100 MB max
Processing runs on your device when supported. Network requests may load the app and supporting assets. Privacy details
Add your input
Your file stays in this browser.
Good to know1 file · 100 MB max
Choose a CSV or text file or paste textResult: Excel files
- Your file stays in this browser while the tool runs.
- Large table previews are capped; downloads keep the complete processed output.
- The first CSV row is treated as headers, and empty lines are skipped. Use distinct column names.
- Parsed CSV values are written as text cells. This preserves identifiers such as 00123; convert calculation columns to numbers in your spreadsheet app when needed.
- CSV does not contain workbook styles, charts, or multiple worksheets. This tool creates a new one-sheet XLSX workbook.
- Fix unclosed quotes, inconsistent row lengths, or duplicate column names before converting. The tool stops instead of exporting an ambiguous table.
Overview
Convert CSV data into an Excel XLSX workbook
Turn one CSV file or pasted table into an XLSX workbook on your device. Parsed values are stored as text, including leading-zero codes and long identifiers. Choose the delimiter and worksheet name, then download a new one-sheet workbook.
Compare your options
PrivConvert vs Microsoft Excel for CSV conversion
Get an XLSX file without opening Excel.
For a straightforward CSV-to-XLSX job, PrivConvert keeps the choice simple: select a CSV or paste a table, choose the delimiter, and download a workbook. No Excel installation or account is needed. Your codes stay text by default, including the zeros that belong at the front.
Scroll the table sideways to see all columns.
| What matters | PrivConvert | Excel's documented import workflow |
|---|---|---|
| Starting point | Open this browser tool and choose a CSV or paste its text. Processing runs on your device. | Microsoft's guide starts in Excel and uses Data > From Text/CSV and the query editor. |
| Leading zeros and long IDs | Parsed CSV values are stored as text by default. Identifiers keep the characters that are present in the source. | Documents setting identifier columns to Text, plus automatic-conversion controls in supported versions. |
| Control over column types | A text-first conversion. Change calculation or date columns deliberately in your spreadsheet app afterward. | Documents choosing data types for individual columns during import. |
| Repeatable transformations | A focused, one-table conversion into a new XLSX workbook. No Power Query-style transformation editor. | Documents a Get & Transform workflow that can refresh data and reapply transformations. |
Choose PrivConvert: You need an Excel-compatible file now, not a spreadsheet setup session. Convert a valid CSV, keep identifiers as text, and take the XLSX straight to your next task.
When the alternative fits: Use Excel's documented import workflow when you already work in Excel and need per-column types or reusable transformations. Neither route can recover digits that were removed before you received the CSV.
Create your XLSX in the browserEditorial comparison by PrivConvert. Competitor details describe their public documentation, not hands-on testing. Features and policies may change. Reviewed .
Keep leading zeros and long identifiers as text
Codes such as 00123 are identifiers, not quantities. This converter writes parsed CSV values as text cells instead of guessing numeric or date types. This preserves the characters present in a valid CSV input; it cannot restore digits already lost before conversion.
- Keep the original CSV and compare a few identifiers after conversion.
- For sums or calculations, convert only the relevant quantity columns to numbers in your spreadsheet app.
- A value that looks like a date remains text; it is not automatically turned into an Excel date.
CSV data is not workbook formatting
CSV stores rows and fields, not Excel fonts, colors, charts, or multiple sheets. Creating an XLSX from CSV gives the data a workbook container; it does not recover formatting from an earlier spreadsheet.
- Use a header row with distinct column names.
- Choose a delimiter explicitly when automatic detection does not match the source.
- This interface converts one CSV or pasted table at a time, not a batch of separate workbooks.
Input
Choose a CSV or text file or paste text
Output
Excel files
Limits
1 file · 100 MB max
Best for
CSV to Excel use cases
- Open a CSV export as a standard Excel workbook.
- Give imported table data a clear worksheet name.
- Convert private spreadsheet data locally before sharing.
Processing
What happens in your browser
PrivConvert uses Papa Parse and SheetJS for this workflow. 2 adjustable settings. No special browser capability is required for typical inputs
Your file stays in this browser while the tool runs.
Related tools
Keep working with this file
Guides & tests
Understand the output before you choose
CSV to Excel Without Losing Leading Zeros — Preserve identifiers such as 00123, distinguish text from numbers, and verify the downloaded workbook with a small public sample.
FAQ
CSV to Excel questions
Is CSV to Excel free to use?
Yes. This tool is free to use in your browser and does not require an account.
Is processing local?
CSV to Excel uses Papa Parse and SheetJS in the browser. Selected input is processed on your device when the required browser features are available. Application, library, model, security, and limited analytics requests may use the network.
What limits should I know about?
1 file · 100 MB max. The first CSV row is treated as headers, and empty lines are skipped. Use distinct column names.
Will CSV to Excel keep leading zeros such as 00123?
The converter stores parsed CSV values as text cells, so 00123 remains 00123 in the XLSX output. The original CSV must still contain the zeros; conversion cannot recover digits removed by an earlier program.
Are numbers and dates automatically converted to Excel types?
No. Parsed CSV values are stored as text. Convert quantity or date columns deliberately in your spreadsheet app when you need calculations or date operations, while keeping identifier columns as text.
Can CSV to Excel detect commas, semicolons, or tabs?
Yes. Use Auto to detect the delimiter, or select comma, semicolon, or tab explicitly.
Can I choose the Excel worksheet name?
Yes. Enter a worksheet name before conversion, or leave it blank to use the default.