Online CSV Viewer
Open, read, and convert multi-gigabyte CSV files instantly
Online CSV Viewer launched on March 29, 2026.
What it does
Open massive CSV files (up to 2GB) without crashing your browser. 100% private, client-side CSV viewer & editor. No server uploads. Fast and secure.
Open, filter, and analyze CSV files up to 2GB directly in your browser. Powered by 100% client-side processing. No Excel limits. No browser crashes. Six browser-based tools to view, convert, split, and merge CSV data. Everything runs locally — zero cloud risk, zero cost. Instantly view gigabyte-sized CSVs in a fast, virtualized grid. Filter, sort, and export — zero lag, zero crash. Convert massive CSV datasets to minified or formatted JSON arrays and objects. 100% client-side, zero upload. Flatten nested JSON API responses or objects into a clean, downloadable CSV file in seconds. Convert raw CSV text into native Microsoft Excel (.xlsx) format without uploading sensitive data anywhere.…from onlinecsvviewer.com
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CSV GB+ by Data.olllo – Open and Process CSVs Locally2025 · apps.microsoft.com · ▲51I 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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