To convert CSV to Excel, choose your CSV data files above, adjust the options if needed and press "Convert to XLSX". The XLSX downloads instantly: free, with no sign-up, and the file never leaves your device.
About the CSV to Excel Converter
This CSV to XLSX converter turns data files from CSV into XLSX without installing software or uploading anything. It solves a common problem: CSV has no formatting, no sheets and no data types. Converting to XLSX gives you an Excel workbook, ideal for working with data in Excel, Google Sheets and accounting or GST software.
Spreadsheets are read and written with SheetJS, the open-source spreadsheet engine used by thousands of data apps, so every sheet, row and value is handled accurately. Because everything happens on your own device, your data files are never uploaded, stored or seen by anyone else, which makes it safe for customer lists, salary sheets, GST data and API exports.
What to expect: the delimiter and text encoding are detected automatically; formulas are exported as their calculated values, while text such as PIN codes and phone numbers with leading zeros stays intact.
How to use the CSV to Excel Converter
- Click "Choose files" or drag your CSV data files onto the box. You can add several at once.
- Choose whether to convert all sheets or only the first one.
- Press "Convert to XLSX". The conversion runs on your device and shows its progress.
- Download each XLSX file, or use "Download all (ZIP)" when you converted several.
- Open the result in Microsoft Excel or Google Sheets to check it; your original CSV is never changed.
Tips & benchmarks
- Every sheet is kept and numbers stay numeric, so SUM and sorting work straight away in Excel.
- Merged cells are unmerged and their value is kept in the first cell, which keeps the data easy to filter and import.
- Keep the file name simple (letters, numbers and hyphens) if you plan to upload the XLSX to a website or government portal.
Frequently asked questions
How do I convert CSV to XLSX?
Click "Choose files", select your CSV data files, adjust the options if you want, and press "Convert to XLSX". The XLSX downloads immediately; with several files you can download everything as one ZIP.
Is this CSV to XLSX converter free and safe?
Yes. It is completely free, with no sign-up, no daily limit and no watermark. The conversion runs inside your browser, so your data files never leave your phone or computer and nothing is stored on News Appite's servers.
Are formulas, formatting and all sheets kept?
Every sheet is converted (or only the first, if you choose). Formulas are exported as their current values, and cell colours and fonts are not carried over because formats such as CSV, JSON and SQL cannot store them.
Can I convert several CSV files at once?
Yes. Add as many CSV files as you like; they are converted one after another and you can download them individually or together as a ZIP.
Does it work on iPhone, Android and Mac?
Yes. The converter works in any modern browser, including Chrome, Safari, Edge and Firefox, on Android, iPhone, iPad, Windows, macOS and Linux. No app is needed.
What is the difference between CSV and XLSX?
CSV (Comma-Separated Values) is a plain-text table best suited to importing data into databases, CRMs, Tally, mailing tools and Python or R. XLSX (Microsoft Excel Workbook (Office Open XML)) is a spreadsheet workbook best suited to working with data in Excel, Google Sheets and accounting or GST software.
Is there a file size limit?
There is no upload limit, because nothing is uploaded. The practical limit is your device's memory: files of a few hundred megabytes work on most computers, and phones handle smaller files comfortably.
How do I convert CSV to Excel in Excel?
Open the file in Excel via Data → From Text/CSV (choose UTF-8 for Hindi or ₹), then use File → Save As. This converter does it instantly and keeps leading zeros such as PIN codes.
CSV ko Excel kaise kare?
Is page par "Choose files" dabaiye, apni CSV file chuniye aur "Convert to XLSX" par click kijiye. XLSX file turant download ho jaati hai. Ye bilkul free hai, sign-up nahi chahiye, aur aapki file kisi server par upload nahi hoti.
CSV vs XLSX: format comparison
| CSV | XLSX | |
|---|---|---|
| Full name | Comma-Separated Values | Microsoft Excel Workbook (Office Open XML) |
| Type | Plain-text table | Spreadsheet workbook |
| Created by | Described in RFC 4180 (2005) | Microsoft, Excel 2007 |
| Compression | None (text) | ZIP-compressed XML |
| File extension | .csv | .xlsx |
| MIME type | text/csv | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |
| Best for | Importing data into databases, CRMs, Tally, mailing tools and Python or R | Working with data in Excel, Google Sheets and accounting or GST software |
| Opens in | Excel, Google Sheets, Notepad, MySQL, pandas and every CRM | Microsoft Excel, Google Sheets, WPS Office, LibreOffice Calc and Apple Numbers |
What is a CSV file?
CSV stores a single table as plain text, one row per line with values separated by commas. Every spreadsheet, database, CRM and programming language can import it, which makes it the universal format for moving data.
What is a XLSX file?
XLSX has been Excel's default format since 2007. One workbook can hold many sheets, formulas, number formats and up to 1,048,576 rows by 16,384 columns per sheet.
Need it the other way round? Use the Excel to CSV Converter.
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