Excel spreadsheets have no inherent page structure — they can span thousands of rows and hundreds of columns. Converting to PDF requires the engine to respect print areas, page break settings, fit-to-page scaling, column widths, and row heights. LibreOffice Calc's print renderer evaluates all of these settings before paginating the content, producing a PDF that mirrors what you would see when printing directly from Excel.
Free Excel Converter — Online
Convert Excel XLSX to PDF, CSV & ODS
Convert Microsoft Excel spreadsheets to PDF for sharing, CSV for data pipelines, or ODS for LibreOffice Calc. Accurate formula and table rendering via LibreOffice.
XLSX, XLS & CSV input
PDF, CSV & ODS output
Formulas evaluated before export
Drop your file here
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Up to 100 MB free • Outputs: PDF, CSV, ODS, TXT
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Files deleted in 2h
Fast processing
No signup needed
Simple & Fast
How to Use Excel Converter
Convert your files in three simple steps — no software, no signup.
01
Upload Your Spreadsheet
Drop an .xlsx, .xls, or .csv file. All sheets, formulas, and formatting are loaded.
02
Choose Output Format
PDF for a print-ready document, CSV for raw data extraction, or ODS for open-source editing.
03
Download Converted File
Your spreadsheet is converted server-side and ready to download in seconds.
Features
Why Use Excel Converter?
XLSX & XLS Support
Full support for modern .xlsx (Excel 2007+) and legacy .xls (Excel 97–2003) formats as input.
CSV Data Extraction
Extract raw spreadsheet data as comma-separated CSV, ready for databases, Python, R, or any data tool.
Print-Ready PDF
Convert each sheet to a PDF page with correct column widths, number formatting, and print area settings.
Formulas Evaluated
LibreOffice evaluates all formulas before export, so output CSV and PDF contain calculated values not formula strings.
Secure & Private
Spreadsheet data is never stored beyond the conversion session. Files deleted within 2 hours of upload.
Multi-Sheet Handling
Multi-sheet workbooks export to PDF with one sheet per page, or CSV with one file per sheet in a ZIP archive.
Compatibility
Supported Formats
All the formats you need, all in one place.
| Format | Description | Extension | Best Used For |
|---|---|---|---|
| XLSX → PDF | Excel to print-ready PDF document | .pdf |
Financial reports, invoices, sharing |
| XLSX → CSV | Excel to comma-separated values | .csv |
Databases, data pipelines, analytics |
| XLSX → ODS | Excel to OpenDocument Spreadsheet | .ods |
LibreOffice Calc, open-source editing |
| XLSX → TSV | Excel to tab-separated values | .tsv |
Bioinformatics, scientific data exchange |
| XLS → XLSX | Legacy Excel to modern format | .xlsx |
Modernise old Excel files |
| CSV → XLSX | CSV data to formatted Excel workbook | .xlsx |
Visualise CSV data with Excel features |
| ODS → XLSX | LibreOffice to Excel format | .xlsx |
Share with Microsoft Office users |
FAQ
Frequently Asked Questions
Yes. LibreOffice calculates all formulas before rendering to PDF, so the PDF shows the computed values (not formula strings) — just like printing from Excel.
When exporting a multi-sheet workbook to CSV, each sheet becomes a separate CSV file. All files are bundled into a single ZIP archive for download.
Yes. Charts, images, and sparklines are rendered in the PDF. Complex conditional formatting and chart types unsupported by LibreOffice may render slightly differently.
CSV files are exported in UTF-8 encoding with BOM to ensure correct display in Excel on Windows. Delimiter is comma by default — select Tab-Separated (TSV) for tab delimiter.
Sheet-level protection (view-only passwords) can be bypassed by LibreOffice for conversion. Workbook-level encryption requires the password — enter it in the options field.
CSV stores raw values only — number formatting (currency symbols, decimal places, date display) is not preserved in CSV. The raw underlying values are exported accurately.
Real-World Uses
Who Uses Excel Converter?
From everyday users to professionals — see how people rely on this tool every day.
Finance Analyst
Share Financial Reports as PDF
Convert formatted Excel P&L or budget sheets to PDF for stakeholder distribution without exposing formulas.
Data Engineer
Excel to CSV for Database Import
Convert XLSX data exports to CSV for bulk import into PostgreSQL, MySQL, or any relational database.
Team Collaborator
Share with LibreOffice Users
Convert XLSX to ODS for colleagues using LibreOffice Calc — all formulas and formatting transfer accurately.
Developer
Modernise Legacy XLS Files
Upgrade .xls (Excel 97–2003) workbooks to modern .xlsx format to remove binary format limitations and improve compatibility.
Business Analyst
Snapshot Reports for Audit Trail
Export Excel models to PDF to create a non-editable audit snapshot that captures calculated values at a specific point in time.
Data Scientist
Extract Data for Analysis
Convert multi-sheet Excel workbooks to individual CSV files — one per sheet — for processing in Python, R, or Julia.
Why TransmuteBox?
TransmuteBox vs. Alternatives
See how we compare to desktop software and other online converters.
| Feature |
Our Tool TransmuteBox |
Adobe Acrobat | Other Online |
|---|---|---|---|
| XLSX → PDF conversion | |||
| XLSX → CSV export | |||
| XLSX → ODS (LibreOffice) | |||
| Formulas evaluated before export | Varies | ||
| Multi-sheet support | |||
| XLS (legacy) input support | Varies | ||
| No watermark | |||
| Free to use |
Under the Hood
Technical Specifications
Built on industry-standard open-source tools for maximum quality and reliability.
Limits & Restrictions
- Max file size: 100 MB (free)
- Input: XLSX, XLS, ODS, CSV
- Output: PDF, CSV, ODS, TSV, XLSX
LibreOffice
Excel
XLSX
XLS
CSV
ODS
Spreadsheet
Conversion Engine
LibreOffice 7.x Calc headless — evaluates all formulas before export
Output Quality
Full formula evaluation · print area respected · charts rendered in PDF output
Average Speed
Typical: 3–8 s per workbook; multi-sheet CSV ZIP generation slightly longer
Data Security
HTTPS transfer · isolated temp dir · auto-purged in 2 h
Input formats
XLSX, XLS, ODS, CSV, TSV
Output formats
PDF, CSV, ODS, TSV, XLSX
Multi-sheet
Each sheet exported separately in ZIP
Complete Guide
Excel Conversion Deep Dive: From XLSX to PDF, CSV, and ODS with LibreOffice Calc
Excel workbooks are among the most complex document formats in widespread use. Accurate conversion requires understanding formulas, named ranges, multi-sheet structures, and the differences between output formats.
Why Excel-to-PDF Is More Complex Than Word-to-PDF
Formula Evaluation Before Export
Before any export, LibreOffice Calc re-calculates the entire workbook. This means that formulas using VLOOKUP, SUMIF, array formulas, and financial functions are all resolved to their current values. The exported CSV or PDF always contains computed results, never formula strings — preventing the common problem of CSV files showing =SUM(A1:A10) instead of the actual total.
Multi-Sheet Workbooks and CSV Export
A single XLSX file can contain many worksheets. When exporting to CSV, each sheet becomes a separate CSV file, named after the original sheet name. These files are bundled into a ZIP archive for download. When exporting to PDF, each sheet becomes one or more pages in the PDF, in the same order as the workbook. Hidden sheets are excluded from both outputs.
ODS — The Open Spreadsheet Standard
ODS (OpenDocument Spreadsheet) is the ISO 26300-standardised format for spreadsheet data. It is the native format of LibreOffice Calc and is fully supported by Google Sheets and Apple Numbers. Converting XLSX to ODS is the best choice when collaborators use open-source office tools and need to edit the spreadsheet — not just view it. Most Excel formulas translate directly to LibreOffice equivalents.
Data Types and CSV Encoding
CSV is deceptively simple but has many edge cases. TransmuteBox exports CSV in UTF-8 with BOM (byte order mark) by default, which ensures correct display of international characters in Excel on Windows. Dates are exported in ISO 8601 format (YYYY-MM-DD) to avoid ambiguity. Numbers use a period as the decimal separator regardless of regional settings, ensuring reliable import into databases and analysis tools.