Excel to CSV

Welcome to the Free Online CSV Viewer. CSV (Comma-Separated Values) is the most ubiquitous data exchange format in the world. Every major data platform — from Google Sheets and Microsoft Excel to SQL databases and data pipelines — can import and export data as CSV. However, quickly previewing a raw CSV file is notoriously difficult. Opening a massive CSV in a plain text editor gives you an incomprehensible wall of comma-separated values. Opening it in Excel requires a desktop application, a license, and significant loading time. Our instant CSV Viewer solves this by rendering any CSV file as a beautifully formatted, interactive data table directly in your browser in milliseconds.

Powerful Built-In Features

• Instant Rendering: Drag and drop any CSV file to see a fully formatted, scrollable HTML table in under a second, regardless of the number of rows or columns.
• Column Sorting: Click any column header to sort the entire dataset by that column, both alphabetically and numerically. Click again to reverse the sort order.
• Live Search & Highlighting: Type into the search bar to instantly filter all rows across every column simultaneously. Matching text within each cell is highlighted in yellow for easy spotting.
• Export as JSON: Convert your CSV data directly into a structured JSON array with one click — invaluable for web developers building REST APIs or feeding data into JavaScript applications.

RFC 4180 Compliant Parsing

Many "simple" CSV parsers fail on edge cases: fields that contain commas, multi-line values wrapped in double quotes, or fields that contain escaped quotation marks. Our CSV parser is engineered to comply with the RFC 4180 specification, correctly handling all these edge cases including quoted fields, escaped double quotes (""), and varying line endings (CRLF and LF). It reliably handles any CSV generated by Excel, Google Sheets, PostgreSQL exports, or custom data pipelines.

Your Data Never Leaves Your Device

Many CSV files contain highly sensitive information: customer databases, financial records, employee payroll data, and healthcare records. Our CSV Viewer is built with an uncompromising privacy-first architecture. When you upload a file, it is read into your browser's local memory using the browser's native FileReader API. Zero bytes of your data are ever transmitted to a server. All parsing, sorting, searching, and exporting operations happen exclusively on your local machine. Once you close the browser tab, every trace of your data is gone.