XLSX Converter
Free XLSX converter that runs entirely in your browser. No upload, no signup — convert to XLSX or from XLSX into 200+ supported formats in one click.
Drop any file here or click to browse
All file types supported
About XLSX
XLSX
XLSX is the Microsoft Excel spreadsheet format introduced with Office 2007, based on the Office Open XML standard. XLSX stores worksheets containing rows, columns, formulas, charts, and styling in a ZIP archive of XML parts. XLSX is the most widely used spreadsheet format and is supported by Microsoft Excel, LibreOffice Calc, Google Sheets, and Apple Numbers.
- Developer
- Microsoft
- Initial release
- 2007
- Compression
- Lossless
- Color depth
- up to 24-bit
- Transparency
- Yes
Best for
- Financial and data analysis
- Storing formulas and charts
- Business spreadsheet sharing
- Collaborative data in Excel or Google Sheets
- Formatted tabular data with styling
Pros
- +Standard Excel spreadsheet format
- +Stores formulas, charts, and styling
- +ZIP-based OOXML open standard
- +Supported by Excel, Google Sheets, LibreOffice Calc, and Numbers
Cons
- −Not ideal for large pure-data interchange
- −Complex structure can be slow to parse
- −Formatting may differ across suites
- −Overkill for plain data tables
How to convert with the XLSX converter
- 1
Choose the XLSX file you want to convert from your PC, Mac or mobile device, or simply drag and drop it onto the page.
- 2
When your file is uploaded, the output format is preset to XLSX. You can add more files to batch-convert them together.
- 3
Click the gear icon and tweak codec, quality, resolution or other options if you need them, then apply to all files if you want.
- 4
Click the Convert button. When conversion completes, download the result to your computer or save it back to Google Drive / Dropbox.
Frequently Asked Questions
What is an XLSX file?▼
XLSX is Microsoft Excel's modern spreadsheet format. It stores cells, formulas, formatting, charts, and multiple sheets, and it is the standard for business and accounting data.
Why convert XLSX to CSV?▼
CSV imports cleanly into databases, banks, CRMs, and analytics tools that choke on formula-driven Excel files. CSV is also far smaller and opens in any editor.
Why convert XLSX to PDF?▼
For sharing a finished report. PDF keeps your layout and formatting frozen — perfect for invoices, statements, or printed reports where the reader should not edit.
Does XLSX keep formulas when converted?▼
If you convert to CSV, only the current values are kept — formulas are calculated and the result text is stored. Keep the XLSX original for further editing.
Are my spreadsheets uploaded when converting?▼
Never. ChameLeo converts locally in your browser — financial and client data stays on your device.
Supported Conversions
Specific converters
100% Free
No hidden fees, no subscriptions, and no limits. Enjoy complete access to all features gratis.
No Signup Required
Start converting immediately without creating an account or sharing email address.
Private & Secure
Your files never leave your device. All processing is completed locally for maximum privacy.
Batch Conversion
Convert multiple files simultaneously to save time. Fast and efficient multi-file queue.
Runs in Browser
Utilizes advanced client-side WebAssembly technology to process files directly inside your tab.
200+ Formats
Supports a wide variety of formats including images, documents, audio, video, and more.
XLSX Converter Quality Rating
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