Large CSV Viewer is a free online CSV viewer, reader, and editor — open any CSV file directly in your browser with no install, no account, and no file size limit. View, filter, sort, and edit millions of rows instantly on Windows, Mac, Linux, and Chrome OS.
Drag & drop your CSV here
or click anywhere to browse — any file size
By the numbers
How it works
What you can do
What people say
“Finally a tool that opens my 2 GB exports without freezing Excel.”
“The regex search and column stats alone make this worth bookmarking.”
“I use this every week to preview database dumps before importing. Nothing else comes close.”
“Converted a 500 MB CSV to JSON in under a minute. Incredibly fast.”
Common questions
A free online CSV viewer is a browser-based tool that lets you open, read, and explore CSV files without installing Excel or any other software. Large CSV Viewer is completely free — no account, no file size limit, and no hidden paywalls. Just drag your file onto the page and your data appears in a clean, sortable table in seconds.
Large CSV Viewer handles files of any size — from a few kilobytes to multiple gigabytes with hundreds of millions of rows. Files are processed in chunks using DuckDB, so you will never experience a browser crash regardless of your row count.
Your CSV is temporarily processed on our server to power fast queries, filtering, and sorting. It is never stored permanently, shared with third parties, or used for any purpose beyond your active session. Data is purged automatically when you close the tab or upload a new file.
You can view, read, search, sort, filter, and edit any CSV file directly in your browser. Features include inline cell editing with undo/redo, column highlighting, regex search, find and replace, infinite scroll, paginated views, column show/hide, column statistics, and full dataset export in CSV, JSON, or Excel format.
Yes. Double-click any cell to edit its value inline. All changes are tracked with full undo/redo support (Ctrl+Z / Ctrl+Shift+Z). Use the File menu to export your modified dataset as CSV, JSON, or XLSX at any time — no row limits on export.
Large CSV Viewer works in all modern browsers — Chrome, Firefox, Safari, and Edge. For best performance with very large files, Chrome or Edge is recommended. Because it runs in the browser, it works identically on Windows, macOS, Linux, and Chrome OS.
Yes, completely free. No account required, no file size paywalls, and no hidden limitations. Every feature — filtering, sorting, editing, regex search, and export — is available at no cost, forever.
Yes. Large CSV Viewer works as a free online CSV reader and file opener — no software needed, no account required. Open any .csv file directly in your browser by dragging it onto the page. It also doubles as a full CSV editor, letting you read, filter, and modify data inline.
Yes. Because Large CSV Viewer runs entirely in your browser, it works identically on Windows, macOS, Linux, and Chrome OS — no native app, plugin, or download required.
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