How do I convert Excel to CSV?

Drag and drop your Excel spreadsheet (.xlsx, .xls, .xlsm) into the upload box or click to select it from your device. Choose your worksheet and desired CSV options, review the live table preview, and click 'Convert & Download CSV'.

Is this Excel to CSV converter free?

Yes, this converter is completely free with no registration, no subscription, and no hidden file size limits.

Are my Excel files uploaded to your servers?

No. Your Excel files are parsed and converted 100% locally within your web browser using client-side JavaScript. Your file data never leaves your device and is never uploaded to TryggMontis or any third party.

Can I convert both XLSX and older XLS files?

Yes. The converter supports modern OpenXML workbooks (.xlsx, .xlsm) as well as legacy Excel 97-2004 binary workbooks (.xls).

Can I convert multiple worksheets?

Yes. You can select any individual worksheet from the dropdown to preview and export, or choose 'All Worksheets' to download separate CSV files for each sheet.

Does CSV preserve formulas and formatting?

CSV is a plain-text tabular format that stores data values only. Visual styling (colors, fonts, borders) and charts are not supported by the CSV standard. Cell formulas are exported using their cached calculated values.

Can I open the converted CSV in Google Sheets or Excel?

Yes. The generated CSV files follow RFC 4180 standards and can be imported immediately into Microsoft Excel, Google Sheets, LibreOffice Calc, Apple Numbers, MySQL, PostgreSQL, and data analysis tools.

Spreadsheet Utility

Excel to CSV Converter

Convert Excel spreadsheets to CSV directly in your browser. Inspect worksheets, preview tabular data, customize delimiters and encodings, and download clean CSV files with 100% privacy.

Drop Excel spreadsheet here

or choose a workbook file from your device

Supports XLSX, XLS, XLSM • Max 150MB

Processing Spreadsheet

Reading workbook data...

Please keep this tab open while parsing.

spreadsheet.xlsx

0 MB • 1 worksheet

Worksheet:

Sheet Preview

Loading rows...

⚙️ CSV Output Configuration

Delimiter

Character Encoding

Line Endings

Field Quoting

Date Format

Export Scope

Output File Name

Include first row as CSV table header

How to Convert Excel to CSV Online

Select or Drop Your Excel File: Upload your .xlsx, .xls, or .xlsm workbook directly into the conversion zone.
Choose Worksheet & Options: If your workbook contains multiple tabs, select the sheet you want to export. Adjust delimiter (comma, semicolon, tab, pipe) and character encoding (UTF-8 or UTF-8 with BOM).
Preview & Download: Inspect the live preview table to confirm rows and columns, then click Convert & Download CSV. Your clean CSV file will download instantly.

XLSX vs CSV: Key Differences

While Microsoft Excel workbooks (.xlsx) and Comma-Separated Values (.csv) both store structured data, they serve fundamentally different purposes in modern computing:

Feature / Capability	Excel Workbook (XLSX)	CSV File
Data Format	Zipped XML binary compound package	Plain human-readable text
Multiple Worksheets	Yes (multiple tabs per workbook)	No (single flat tabular sheet per file)
Visual Styling & Colors	Yes (fonts, borders, fills, alignments)	No (raw data only)
Formulas & Macros	Yes (dynamic calculations, VBA, XLSM)	No (stores evaluated static values only)
Charts & Visualizations	Yes (embedded pivot charts, graphs)	No
Database & API Ingestion	Requires dedicated parsing libraries	Universal native support across all databases
File Size & Portability	Larger overhead	Ultra-lightweight, compact, streamable

What is a CSV File?

A CSV (Comma-Separated Values) file is a standard plain-text format for storing tabular data where each line represents a data record, and each record consists of fields separated by a delimiter (typically a comma).

CSV is the industry standard format for:

Database Ingestion & Migration: Bulk importing records into MySQL, PostgreSQL, SQLite, Oracle, and MongoDB.
SaaS & Cloud Interoperability: Moving customer lists, invoices, and analytics between CRM systems (HubSpot, Salesforce) and spreadsheet tools (Google Sheets, Microsoft Excel).
Data Science & Machine Learning: Loading datasets cleanly into Python (Pandas, NumPy), R, and Jupyter notebooks.
Automated Workflows: Parsing server logs, transactional data, and accounting exports.

Formula & Date Handling in Browser Conversion

Formula Evaluation: Formula cells in your spreadsheet are exported using their cached/calculated values stored in the workbook. Formulas are not recomputed in the browser, ensuring exact numerical fidelity with your saved Excel file.

Excel Date Handling: Excel stores dates internally as serial numbers counted from January 1, 1900. Our converter automatically maps date cells to readable calendar dates or standard ISO 8601 strings (YYYY-MM-DD) according to your selected configuration.

Special Characters & UTF-8 BOM: When exporting non-English text, Hindi (Devanagari), European accents, or currency symbols (₹, €, £), selecting UTF-8 with BOM ensures Microsoft Excel displays characters correctly upon double-clicking the CSV file.

Frequently Asked Questions

How do I convert an Excel spreadsheet to CSV?

Upload your .xlsx or .xls file above. The tool immediately extracts and renders your worksheets in browser memory. Select your preferred sheet, verify the data in the preview table, and click "Convert & Download CSV".

Are my Excel files uploaded to any server?

No. All parsing and conversion occurs 100% locally on your computer inside your web browser. TryggMontis never receives, uploads, transmits, or stores your spreadsheet data.

Can I convert multi-sheet Excel files?

Yes. You can switch between any worksheet tab to convert it individually, or choose "All Sheets" under Export Scope to download a distinct CSV file for every tab in your workbook.

Does CSV conversion preserve cell formulas and formatting?

CSV files only store raw plain-text data. Visual styling like font colors, borders, and highlights are discarded. Formula cells are exported using the last evaluated values saved in the workbook.

What is UTF-8 with BOM, and when should I use it?

A Byte Order Mark (BOM) is a special 3-byte sequence (0xEF, 0xBB, 0xBF) placed at the beginning of a UTF-8 file. It signals to Microsoft Excel on Windows that the CSV contains Unicode characters (such as Hindi, Arabic, Chinese, or European accents), preventing garbled text encoding.

Can I convert large Excel files?

Yes. The tool processes spreadsheets up to 150MB with tens of thousands of rows smoothly. To ensure fast UI performance, the preview table displays the first 100 rows, while the full dataset is converted during download.

Can I use the exported CSV in Google Sheets or MySQL?

Yes. The exported CSV files comply strictly with RFC 4180 standards and can be directly imported into Google Sheets, Microsoft Excel, MySQL (LOAD DATA INFILE), PostgreSQL (\copy), and Pandas.