All Tools
11 free tools to view, convert, merge, and clean spreadsheets. Powered by a browser-based spreadsheet engine — your files never leave your device.
Open and view .xlsx and .xls files directly in your browser — no Office needed. Switch sheets, sort columns, search data.
Spreadsheet ToolsConvert Excel spreadsheets to CSV. Pick a sheet, preview the data, and download a clean CSV file.
Spreadsheet ToolsConvert CSV files to .xlsx format. Drop a CSV or paste data — download a ready-to-use Excel file.
Spreadsheet ToolsConvert Excel spreadsheets to JSON arrays. Pick a sheet and get formatted JSON output — copy or download.
Spreadsheet ToolsConvert JSON arrays to Excel .xlsx files. Paste your JSON data and download a formatted spreadsheet.
Spreadsheet ToolsCombine multiple CSV files into one. Auto-matches columns by header — handles mismatched schemas.
Spreadsheet ToolsSplit a multi-sheet Excel file into separate .xlsx or .csv files — one per sheet. Download individually or as a ZIP.
Spreadsheet ToolsRemove duplicate rows from spreadsheets and CSV files. See exactly what was removed and download the cleaned data.
Spreadsheet ToolsConvert Excel files to styled HTML tables. Copy the HTML code or preview the rendered table — perfect for embedding.
Spreadsheet ToolsConvert tab-separated values to comma-separated. Drop a .tsv file or paste tab-delimited data and get clean CSV output.
Spreadsheet ToolsDelete, reorder, rename, and filter columns in any spreadsheet or CSV. Visual drag-and-drop column management.
Free online spreadsheet tools that run 100% in your browser. View Excel files without installing Office, convert between Excel, CSV, JSON, TSV, and HTML formats, merge multiple files, remove duplicates, and edit columns — all without uploading your data to any server. Your files stay on your device, processed locally using a powerful browser-based spreadsheet engine.
Most online spreadsheet converters upload your files to a remote server for processing. That means your data — financial reports, customer lists, business metrics — passes through someone else's infrastructure. These tools work differently: everything runs locally in your browser using a client-side spreadsheet engine. No upload, no server, no data collection. Open a 50MB Excel file or convert sensitive CSV data with zero privacy risk.
These tools support .xlsx (modern Excel), .xls (legacy Excel), .csv (comma-separated values), .tsv (tab-separated values), and JSON arrays. Convert freely between any of these formats, or export to HTML tables for embedding in websites and emails.
Yes. Every tool is mobile-friendly and works on any device with a modern browser — phones, tablets, laptops. No app install required. Just open the tool and drop your file.