Open XLSX File Online - Free Online Excel Viewer (XLSX, XLS, CSV) - Open Excel File Online

Click to select XLSX / XLS file, or drag and drop here

Supports clicking to browse, drag and drop, or copying a file and pressing Ctrl + V to paste

.XLSX .XLS .CSV Privacy First (No Server Upload) Local In-Browser Only

📖 How to Quickly Open XLSX Files Online?

XLSX is the standard OpenXML-based spreadsheet format used by Microsoft Excel 2007 and newer. Without downloading bulky Office software or registering an account, this online viewer enables you to open and view spreadsheet contents directly on any device.

Step-by-Step Guide to Opening XLSX Files

Select and Import File

Click the "Import XLSX File" button or dropzone above to choose your .xlsx, .xls, or .csv spreadsheet. For the fastest experience, there are 3 easy import methods: copy & paste, drag & drop, and click to browse.

Instant Spreadsheet Preview

The local browser engine automatically parses and renders the entire workbook data within seconds, supporting multi-sheet switching and fullscreen viewing.

3 Easy Ways to Import XLSX Files

Click to Browse

Click "Import XLSX File" or the workspace to pick your local .xlsx, .xls, or .csv file from your file explorer.

Drag & Drop

Drag your spreadsheet file from your desktop, folders, or file manager and drop it into the browser window to load immediately.

Paste via Ctrl + V

Copy an Excel file or tabular text in your OS, then press Ctrl + V on this page to instantly parse and open.

Cross-Platform & Zero Installation

Built with modern web standards and Web Component technology, all processing runs locally on your device across all major platforms:

🖥️ Windows (11 / 10 / 8 / 7) 🍎 macOS (MacBook / iMac) 🐧 Linux (Ubuntu / Debian / CentOS) 📱 Android (Phones & Tablets) 📱 iOS (iPhone / iPad) 💻 ChromeOS & HarmonyOS

100% Local Privacy & Secure Parsing

Unlike cloud-based conversion tools, this tool never uploads your spreadsheets to any remote server. All financial data, business metrics, and personal records are parsed entirely within your local browser memory, ensuring maximum data privacy.

⚡ Key Features Supported by Online Excel Viewer

This online Excel viewer delivers high-performance spreadsheet inspection comparable to desktop applications without installing Office or WPS suites:

📑

Multi-Sheet Switching

Fully parses and displays all sheets in the workbook. Easily switch between sheets via the bottom tab bar.

📁

XLSX & Legacy XLS Compatible

Seamless support for modern .xlsx formats, legacy .xls workbooks, and delimited .csv / .tsv tables.

🔍

Search Cells & Content

Quickly search keywords across all cells with instant highlight and jump navigation in large tables.

📋

Multi-Cell Selection & Copy

Select ranges of cells with your mouse and use keyboard shortcuts (Ctrl + C) to copy data directly.

🔍

Zoom & Fullscreen View

Zoom in or out on sheets and toggle fullscreen mode for maximum data visibility on monitors and laptops.

🎨

Rich Styles & Merged Cells

Accurately restores merged cells, font colors, background fills, text alignment, and bold formatting.

↔️

Resizable Columns & Rows

Drag header borders to adjust column width and row height with smooth bidirectional scrolling.

🖼️

Embedded Images & Large Preview

Supports Office 365 / WPS cell embedded images (DISPIMG) and drawing shapes with double-click large preview.

❓ Frequently Asked Questions (FAQ)

📌 1. Which spreadsheet formats are supported?

Full support for modern Excel spreadsheets (.xlsx), classic Excel workbooks (.xls), and comma-separated value tables (.csv, .tsv).

📌 2. Will viewing large multi-sheet workbooks lag?

The tool utilizes a virtualized rendering engine that only paints visible cells, ensuring smooth scrolling and fast loading even with tens of thousands of rows.

📌 3. How can I get a wider spreadsheet view?

Click the "Fullscreen" button on the toolbar to expand the spreadsheet across your full screen for an immersive inspection experience. Click again to exit.