CSV Tabs

Convert Multiple CSVs to Excel Tabs

Instantly import multiple CSV files into separate tabs (sheets) inside a single Excel workbook. 100% free and private.

Tap to select CSV files

0 / 10 files

Max total upload size: 50MB

.xlsx

How to convert CSVs to Excel Tabs

1. Upload CSV files

Drag and drop your CSV files into the upload area. You can add up to 10 files at once.

2. Review & Rename

The tool automatically cleans filenames for valid Excel tabs. Enter a custom name for your final workbook.

3. Download Excel

Click generate and your new Excel file will download instantly. All processing happens securely in your browser.

About this tool

CSV Tabs is a free, browser-based utility that converts multiple CSV files into a single Excel workbook (.xlsx) where each CSV file is placed on its own separate sheet tab — without merging, mixing, or uploading your records.

There are many "CSV Combiner" tools on the internet, but most of them work by merging your data vertically stacking the rows of multiple CSV files into one giant list.

CSV Tabs is different. It takes your multiple CSV files and imports each one into its own separate worksheet (tab) within a single Excel (.xlsx) workbook. This is perfect for organizing monthly reports, separating data by category, or keeping distinct datasets together in one file without mixing the rows.

100% Private & Secure

Your data is never uploaded to a server. All processing—parsing the CSVs and generating the Excel file happens entirely within your web browser using JavaScript. This means it's incredibly fast and completely safe for sensitive, confidential, or proprietary data.

Frequently Asked Questions

How do I convert multiple CSV files into one Excel workbook with separate sheets?
Use CSV Tabs: drag and drop your CSV files into the upload zone, and our tool automatically generates a single Excel (.xlsx) workbook where each of your CSV files is mapped to its own separate tab (sheet). The conversion process happens entirely inside your browser, so your file data remains local and secure.
Is CSV Tabs free to use?
Yes, CSV Tabs is 100% free with no sign-ups, subscriptions, or usage limits. It runs locally in your web browser.
Is my data secure when using CSV Tabs?
Absolutely. All processing (parsing the CSVs and packaging the Excel sheet) is done inside your browser memory using local JavaScript. Your files are never uploaded to any server. It is safe to use with private, financial, or sensitive business records.
What is the difference between merging CSVs and using CSV Tabs?
Most online tools merge CSVs by vertically stacking their rows into one long worksheet. CSV Tabs does not merge rows; instead, it creates a separate Excel tab/sheet for each CSV file. This keeps your datasets completely organized and distinct inside a single workbook.
What are the file size and count constraints?
You can convert up to 10 CSV files at the same time. The limits are 10MB per file and a total combined size of 50MB per session.
Is the output file compatible with Microsoft Excel and Google Sheets?
Yes. The generated file is a standard Microsoft Excel Workbook (.xlsx), fully compatible with Microsoft Excel, Google Sheets, LibreOffice Calc, Apple Numbers, and other spreadsheet programs.