DevToolKit

Professional CSV Viewer

Open and analyze large CSV/TSV files instantly. Features include 1M+ row support, column sorting, advanced filtering, statistics, and 100% private client-side processing.

Open CSV Spreadsheet

Drag and drop your file here or click to browse. We support CSV, TSV, and semicolon-delimited files up to 100MB.

100% Client-Side Processing
Processed locally
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How to Use

The Professional CSV Viewer is a high-performance tool designed to open, browse, and analyze large datasets directly in your browser. It uses virtualization to handle files with over a million rows without impacting system performance.

How to use the CSV Viewer

  1. Load File: Drag and drop a .csv or .tsv file into the dropzone, or click to select from your computer.
  2. Navigate & Search: Use the virtualized grid to scroll through millions of rows smoothly. Type in the filter box below any column header to instantly search that column.
  3. Sort Data: Click any column header to toggle between ascending and descending order.
  4. Analyze: Switch to the Analytics tab to see detailed statistics for every column, including averages, sums, and unique value counts.

About This Tool

Industrial-Grade Data Analysis

Most online CSV viewers crash when handling files larger than a few megabytes. Our viewer is built using an optimized Virtualized Grid architecture. By only rendering the rows visible on your screen, it can handle massive spreadsheets while maintaining 60FPS scrolling and instant filtering.

Whether you are a developer debugging a database export or a data scientist performing a quick sanity check on a large dataset, this tool provides the precision and speed of a desktop application with the convenience of a web browser.

Why Use This Tool

100% Private & Secure

Data privacy is critical when handling internal reports or user lists. Unlike other tools, we never upload your data to a server. The entire parsing and analysis process happens locally in your browser's memory using JavaScript and WebAssembly. Your data remains strictly confidential and secure on your local machine.

FAQ

How many rows can this viewer handle?
The viewer supports files with over 1 million rows using table virtualization — only the rows visible on screen are rendered in the DOM, keeping performance smooth regardless of file size.
Does it support TSV and other delimiters?
Yes. The viewer automatically detects the delimiter (comma, tab, semicolon, pipe) and applies it correctly. You can also specify a custom delimiter.
Is my data uploaded to a server?
No. The file is processed entirely in your browser. Your data never leaves your device, making it ideal for files containing sensitive information.
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