SheetRows
100% Free Private Excel tools | Zero data leaves your device
What it does
Collection of free online tools for CSV and Excel files. Merge, split, subtract, compare, combine, update data, add country codes, and convert between Excel and PDF. The key difference? Every operation runs 100% in your browser. Your files never leave your device, no uploads, no servers, no sign-ups. Just drag, drop, and download. Built for marketers, data analysts, and anyone who works with spreadsheets daily but doesn't want to install software or trust cloud services with sensitive data.
Does the same job
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I built CSV GB+ by Data.olllo, a local data tool that lets you open, clean, and export gigabyte-sized CSVs (even billions of rows) without writing code. Most spreadsheet apps choke on big files. Coding in pandas or Polars works—but not everyone wants to write scripts just to filter or merge CSVs. CSV GB+ gives you a fast, point-and-click interface built on dual backends (memory-optimized or disk-backed) so you can process huge datasets offline. Key Features: Handles massive CSVs with ease — merge, split, dedup, filter, batch export Smart engine switch: disk-based "V Core" or RAM-based "P…
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DataMani — Free Data Manipulation ToolsJul 2026 · data-mani.com · ▲3Merge, split & convert Excel/CSV — zero uploads, zero cost
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