Free Spreadsheet Tools - XLSX to CSV, CSV to Excel & More
Csv Stats
Analyze CSV files with detailed statistics. View row/column counts, data types, unique values, missing data, min/max. Browser-based data profiling.
CSV to Excel Converter
Convert CSV files to Excel spreadsheets (XLSX) instantly in your browser. Auto-detect delimiters, format columns. No uploads, works offline.
Csv To Xlsx
Convert CSV files to Excel spreadsheets (XLSX) instantly in your browser. Auto-detects delimiters, preserves data formatting. Private, no uploads.
Csv To Ods
Convert CSV files to OpenDocument Spreadsheet (ODS) format for LibreOffice and OpenOffice. Auto-detect delimiters. No uploads required.
Csv To Tsv
Convert CSV files to TSV (tab-separated values) format. Change delimiter from comma to tab. No uploads, all processing in browser.
CSV Viewer
View CSV and TSV files in a sortable, filterable table. Edit cells, add rows, and export. No uploads, works offline. Fast and private.
Xlsx Chart Extractor
Extract chart information from Excel files. View chart types, titles, data ranges, and series. Export chart metadata to JSON.
Xlsx Formula Extractor
Extract and analyze Excel formulas with function statistics, cell references, and dependencies. Export formula audit reports. Browser-based.
Xlsx Formula Viewer
View all formulas in Excel XLSX files at once. Audit spreadsheets, understand calculations, export formula list. No Excel needed.
Excel Merger
Merge multiple Excel files into one workbook. Combine sheets or append rows. No software installation, works in your browser.
Xlsx Stats
Analyze Excel files for statistics and data quality. Get row counts, column types, blank cells, duplicates. Browser-based, private analysis.
Excel To Csv
Convert Excel spreadsheets (XLSX, XLS) to CSV format instantly in your browser. Select sheets, customize delimiters. No uploads, works offline.
Xlsx To Html
Convert Excel (XLSX, XLS) to HTML tables for web embedding. Add Bootstrap styling, responsive tables, clean markup. Works offline, no uploads.
Xlsx To Json
Convert Excel spreadsheets (XLSX, XLS) to JSON format instantly. Select sheets, customize output format, preview data. No uploads, works offline.
Xlsx To Markdown
Convert Excel spreadsheets to Markdown tables. Select sheets, format columns, copy or download. No uploads, works offline.
Excel Viewer
View Excel XLSX files without Microsoft Office. Switch between sheets, search data, copy cells. Fast, private, browser-based viewer with no uploads.
Json To Xlsx
Convert JSON to Excel spreadsheet (XLSX) in your browser. Handles nested objects and arrays with flattening options. Free, private, no uploads required.
Ods To Csv
Convert OpenDocument Spreadsheet (ODS) files to CSV format instantly in your browser. Select sheets, customize delimiters. No uploads required.
Ods To Xlsx
Convert OpenDocument Spreadsheet (ODS) files to Microsoft Excel XLSX format. Preserve data, sheets, formatting. No uploads, works in browser.
Tsv To Csv
Convert TSV files to CSV (comma-separated values) format. Change delimiter from tab to comma. No uploads, all processing in browser.
Tsv Viewer
View TSV files in a sortable, filterable table. Handles tab-delimited data with proper column alignment. Fast, private, browser-based viewing.
Xlsx To Ods
Convert Microsoft Excel spreadsheets (XLSX) to OpenDocument Spreadsheet (ODS) format for LibreOffice. No uploads, works in browser.
Spreadsheet Format Conversion
Spreadsheet conversion enables data exchange between different office suites and systems. Whether you're migrating from Excel to Google Sheets, importing data into a database, or sharing files with users on different platforms, format conversion bridges compatibility gaps.
Excel Formats (XLSX, XLS)
XLSX is Microsoft Excel's modern format, introduced in Office 2007. It's an XML-based format stored in a ZIP container, supporting multiple sheets, formulas, charts, formatting, and pivot tables. XLSX files are smaller than legacy XLS and are widely supported.
XLS is the legacy binary format from earlier Excel versions. While still readable by modern software, it has size limitations (65,536 rows) and lacks newer features.
OpenDocument Spreadsheet (ODS)
ODS is the open standard used by LibreOffice Calc, OpenOffice, and Google Sheets (for export). As an ISO-standardized format, it ensures long-term accessibility and vendor independence.
CSV for Data Exchange
CSV is the universal exchange format for tabular data. It exports a single sheet as plain text with comma-separated values. While CSV loses formatting and formulas, it's readable by virtually any software including databases, programming languages, and text editors.
Conversion Scenarios
- Excel to CSV: Export data for database import or data analysis tools
- CSV to Excel: Add formatting, formulas, and charts to raw data
- XLSX to ODS: Share files with LibreOffice users or migrate away from Microsoft Office
- Multi-sheet export: Convert workbooks to multiple CSV files or ZIP archives