Spreadsheet Tools
Excel to CSV, CSV to Excel, formula generators, and spreadsheet utilities.
All 7 tools below are 100% free, need no signup, and run entirely in your browser — your files never leave your device.
Work with CSV and Excel data without opening heavy software: view and sort large CSVs, remove duplicate rows, add or reorder columns, split big files, and convert between CSV, TSV, HTML and JSON. Great for quick clean-ups before an import or a report. Your spreadsheets are parsed in the browser and never uploaded.
All Spreadsheet Tools
CSV Viewer
View CSV files as a sortable, searchable table online. Click any column to sort, filter rows instantly, paginate large files.
CSV Deduplicator
Remove duplicate rows from CSV files online for free. Deduplicate by all columns or a specific key column. Download clean CSV instantly.
CSV Column Manager
Rename, reorder, show or hide CSV columns online. Drag to reorder, toggle visibility, rename headers — then copy or download the result.
TSV ↔ CSV
Convert TSV (tab-separated) to CSV or CSV back to TSV instantly. Perfect for data pasted from Excel or Google Sheets.
CSV to HTML Table
Convert CSV data to a styled HTML table instantly. Choose styling options, preview the result live, and copy the HTML code.
CSV Splitter
Split large CSV files into smaller chunks by row count. Download each chunk separately with the header row included.
Excel Viewer Online
Open Excel spreadsheets (.xlsx, .xls, .ods, .csv) online for free — no Microsoft Excel needed. View multiple sheets, search rows, and export to CSV. 100% private.
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Frequently asked questions about spreadsheet tools
Can I open a large CSV without Excel?
Yes. The CSV viewer renders and sorts large files right in your browser — no Excel or Google Sheets needed.
Is my spreadsheet data private?
Completely. Files are parsed locally in the browser and never sent to a server.
Can I clean duplicates and columns before importing?
Yes — remove duplicate rows, drop or reorder columns, and split files, then download the cleaned CSV.