Need to convert multiple files?
Use our batch converter to process multiple XLSX files at once with individual progress tracking and ZIP download.
AI assists for this conversion
Smarter XLSX → CSV
AI-assisted cleanup
Detect malformed CSV/JSON/XML before conversion, fix delimiters, and suggest column types or date normalization.
AI mapping templates
Save field mappings per user or industry and auto-apply them on the next upload with a 1-click repeat conversion.
Live privacy badge
All processing stays in-browser with no uploads; view the open-source conversion snippet below.
Free XLSX to CSV Converter Online - No Registration Required
Extract data from Excel workbooks to universal CSV format for data portability.
Why Use Our XLSX to CSV Converter?
100% Free
No registration, no hidden fees, unlimited conversions
Secure & Private
Files processed in your browser, never uploaded
Lightning Fast
Instant conversion with no waiting in queues
No Limits
Convert files of any size, any time
How to Convert XLSX to CSV
- 1
Upload Your XLSX File
Click the upload area above or drag and drop your XLSX file directly into the converter. You can also paste file content if applicable.
- 2
Automatic Conversion Process
Our tool instantly processes your file in your browser. No server upload means your data stays private and the conversion is lightning fast.
- 3
Download Your CSV File
Once conversion is complete, download your CSV file immediately. The converted file maintains all data integrity and formatting.
Common Use Cases for XLSX to CSV Conversion
💼 Business & Enterprise
Convert data exports, reports, and business documents between XLSX and CSV formats for integration with various business systems and workflows.
👨💻 Developers & IT
Transform data structures, API responses, and configuration files between XLSX and CSV for application development and system integration.
📊 Data Analysis
Prepare data for analysis tools and databases by converting between XLSX and CSV formats while maintaining data structure and relationships.
Frequently Asked Questions
Is this XLSX to CSV converter really free?▼
Yes, absolutely! Our converter is completely free with no hidden costs, registration requirements, or usage limits. Convert as many files as you need, whenever you need.
How secure is the conversion process?▼
Extremely secure. All file conversions happen directly in your browser using JavaScript. Your XLSX files never leave your device or get uploaded to any server, ensuring complete privacy and data security.
What file sizes can I convert?▼
There are no file size restrictions. However, very large files (100MB+) may take longer to process depending on your device's performance, since all processing happens locally in your browser.
Will my data format be preserved accurately?▼
Yes, our converter is designed to maintain data integrity throughout the conversion process. All fields, structures, and formatting are preserved when converting from XLSX to CSV.
Do I need to install any software?▼
No installation required! This is a web-based tool that works in any modern browser (Chrome, Firefox, Safari, Edge). Just visit this page and start converting.
Can I convert multiple files at once?▼
Currently, files are converted one at a time to ensure optimal performance and accuracy. However, you can convert as many files as you need in succession without any limitations.
About XLSX and CSV Formats
Converting between XLSX and CSV formats is a common need across many industries and use cases. Our tool handles this conversion efficiently while maintaining the integrity of your data.
Whether you're a developer working with APIs, a data analyst preparing datasets, or a business professional managing documents, this free converter provides a fast, secure, and reliable solution for all your XLSX to CSV conversion needs.